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geminidb_umn_20240905

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Reviewed-by: Wagner, Fabian <fabian.wagner@t-systems.com>
Co-authored-by: Ru, Li Yi <liyiru7@huawei.com>
Co-committed-by: Ru, Li Yi <liyiru7@huawei.com>
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Ru, Li Yi 2024-10-10 10:30:44 +00:00 committed by zuul
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<a name="nosql_01_0003"></a><a name="nosql_01_0003"></a>
<h1 class="topictitle1">Regions and AZs</h1>
<div id="body0000001074203515"><div class="section" id="nosql_01_0003__section9706184519384"><h4 class="sectiontitle">Concepts</h4><p id="nosql_01_0003__p1970613452387">A region and availability zone (AZ) identify the location of a data center. You can create resources in a specific region and AZ.</p>
<ul id="nosql_01_0003__ul3706194513817"><li id="nosql_01_0003__li470644533813">A region is a physical data center. Each region is completely independent, improving fault tolerance and stability. After a resource is created, its region cannot be changed.</li><li id="nosql_01_0003__li370654543815">An AZ is a physical location using independent power supplies and networks. Faults in an AZ do not affect other AZs. A region can contain multiple AZs, which are physically isolated but interconnected through internal networks. This ensures the independence of AZs and provides low-cost and low-latency network connections.</li></ul>
<div id="body0000001074203515"><div class="section" id="nosql_01_0003__section9706184519384"><h4 class="sectiontitle">Concepts</h4><p id="nosql_01_0003__p1970613452387">The combination of a region and an availability zone (AZ) identifies the location of a data center. You can create resources in a specific AZ in a region.</p>
<ul id="nosql_01_0003__ul3706194513817"><li id="nosql_01_0003__li470644533813">Regions are defined by their geographical location and network latency. Public services, such as Elastic Cloud Server (ECS), Elastic Volume Service (EVS), Object Storage Service (OBS), Virtual Private Cloud (VPC), Elastic IP (EIP), and Image Management Service (IMS), are shared within the same region. Regions are classified as universal regions and dedicated regions. A universal region provides universal cloud services for common tenants. A dedicated region provides only services of the same type or provides services only for specific tenants.</li><li id="nosql_01_0003__li370654543815">An AZ is a physical location where resources use independent power supplies and networks. A region contains one or more AZs that are physically isolated but interconnected through the internal network. The fault of an AZ will not affect other AZs. The internal network provides economical connection with low latency.</li></ul>
</div>
</div>
<div>

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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="nosql_06_0001.html">Instance Connection Methods</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_06_0003.html">Creating a GeminiDB Cassandra Instance</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_02_0006.html">Connecting to a GeminiDB Cassandra Instance Over Private Networks</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_02_0007.html">Connecting to a GeminiDB Cassandra Instance Over Public Networks</a></strong><br>

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<h1 class="topictitle1">Configuring Security Group Rules</h1>
<div id="body1568079458237"><div class="section" id="nosql_02_0004__section3152058916230"><h4 class="sectiontitle"><strong id="nosql_02_0004__b16218454114513">Scenarios</strong></h4><p id="nosql_02_0004__p199191161250">The default security group rule allows all outgoing data packets. <span id="nosql_02_0004__text84651218553">ECS</span><span id="nosql_02_0004__text154659184517"></span>s and <span id="nosql_02_0004__text346516182514">GeminiDB</span> instances in the same security group can access each other. After a security group is created, you can create different rules for that security group, which allows you to control access to the <span id="nosql_02_0004__text24651218954">GeminiDB</span> instances that in it.</p>
<p id="nosql_02_0004__p43222116204125">The following describes how to set security groups.</p>
<p id="nosql_02_0004__p43222116204125">The following describes how to configure security groups.</p>
</div>
<div class="section" id="nosql_02_0004__section9456131432010"><h4 class="sectiontitle"><strong id="nosql_02_0004__b622952211485">Precautions</strong></h4><ul id="nosql_02_0004__ul10612183218515"><li id="nosql_02_0004__li8531887277">If the ECS and DB instance are in the same security group, they can communicate with each other by default. No security group rule needs to be configured.</li><li id="nosql_02_0004__li06121321516">If the ECS and DB instance are in different security groups, you need to configure security group rules for the ECS and DB instance separately.<ul id="nosql_02_0004__ul13612732951"><li id="nosql_02_0004__li4571145411248">To allow access to the <span id="nosql_02_0004__text20661161562618">GeminiDB Cassandra</span> instance, you need to configure an inbound rule for the security group that the instance nodes belong to.</li><li id="nosql_02_0004__li14612163220515">By default, the security group allows all outbound data packets, so you do not need to configure a security rule for the ECS. If not all access from the ECS is allowed, you need to configure an outbound rule for the ECS.</li></ul>
<div class="section" id="nosql_02_0004__section9456131432010"><h4 class="sectiontitle"><strong id="nosql_02_0004__b622952211485">Precautions</strong></h4><ul id="nosql_02_0004__ul10612183218515"><li id="nosql_02_0004__li8531887277">If the ECS and DB instance are in the same security group, they can communicate with each other by default. No security group rule needs to be configured.</li><li id="nosql_02_0004__li06121321516">If the ECS and DB instance are in different security groups, you need to configure security group rules for the ECS and DB instance separately.<ul id="nosql_02_0004__ul13612732951"><li id="nosql_02_0004__li4571145411248">To allow access to a <span id="nosql_02_0004__text20661161562618">GeminiDB Cassandra</span> instance, you need to configure an inbound rule for the security group that the instance nodes belong to.</li><li id="nosql_02_0004__li14612163220515">By default, the security group allows all outbound data packets, so you do not need to configure a security rule for the ECS. If not all access from the ECS is allowed, you need to configure an outbound rule for the ECS.</li></ul>
</li></ul>
<ul id="nosql_02_0004__ul11655735142317"><li id="nosql_02_0004__li18793238132312">By default, you can create up to 500 security group rules. However, too many rules increase network latency for initial access, so it is recommended that you add no more than 50 rules for each security group.</li></ul>
</div>

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<a name="nosql_02_0005"></a><a name="nosql_02_0005"></a>
<h1 class="topictitle1">Connecting to a <span id="text19728925133719">GeminiDB Cassandra</span> Instance Over Private Networks</h1>
<h1 class="topictitle1">Connecting to a <span id="text1938753116712">GeminiDB Cassandra</span> Instance Over Private Networks</h1>
<div id="body1568078909894"><div class="section" id="nosql_02_0005__section46429645141251"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_02_0005__p1112805719352">This section uses the Linux operating system as an example to describe how to connect an <span id="nosql_02_0005__text1164264675114">ECS</span><span id="nosql_02_0005__text168815020519"></span> to a <span id="nosql_02_0005__text86721610121615">GeminiDB Cassandra</span> instance over private networks.</p>
</div>
<div class="section" id="nosql_02_0005__section135810251275"><h4 class="sectiontitle">Constraints</h4><ul id="nosql_02_0005__ul53814073144559"><li id="nosql_02_0005__li109347144559">The DB instances must be in the same VPC subnet as the <span id="nosql_02_0005__text2085319140529">ECS</span><span id="nosql_02_0005__text14958111717525"></span>.</li><li id="nosql_02_0005__li09011230251">The <span id="nosql_02_0005__text7888182617523">ECS</span><span id="nosql_02_0005__text6640929105219"></span> must be allowed in a security group that has access to the DB instances.<ul id="nosql_02_0005__ul53121930773"><li id="nosql_02_0005__li92211747371">If the security group that the target DB instance belongs to is the default security group, you do not need to configure security group rules.</li><li id="nosql_02_0005__li14221947274">If the security group that the target DB instance belongs to is not the default security group, check whether the security group rules allow the <span id="nosql_02_0005__text04782401524">ECS</span><span id="nosql_02_0005__text182091844135212"></span> to connect to the DB instance. For details, see section <a href="nosql_02_0004.html">Configuring Security Group Rules</a>.<p id="nosql_02_0005__p1798910425117">If the security group rules allow the access from the <span id="nosql_02_0005__text13715175975217">ECS</span><span id="nosql_02_0005__text971732105318"></span>, the ECS can connect to the DB instance.</p>
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</li></ul>
</li><li id="nosql_02_0005__li7354102612436">The default port of the <span id="nosql_02_0005__text46739248164">GeminiDB Cassandra</span> instance is 8635.</li></ul>
</div>
<div class="section" id="nosql_02_0005__section45253223112"><h4 class="sectiontitle">Prerequisites</h4><ul id="nosql_02_0005__ul3360182717119"><li id="nosql_02_0005__li203601427316">Create an <span id="nosql_02_0005__text892012516537">ECS</span><span id="nosql_02_0005__text159212051115319"></span> running Linux. For details, see "Creating <span id="nosql_02_0005__text8205123020547">ECS</span><span id="nosql_02_0005__text320510301548"></span>s" in <em id="nosql_02_0005__i1911412210188"><span id="nosql_02_0005__text3805010175417">ECS</span><span id="nosql_02_0005__text68051108547"></span> User Guide</em>.</li><li id="nosql_02_0005__li65523118612">Obtain the Cassandra client installation package from the Cassandra official website.</li><li id="nosql_02_0005__li81904414417">Before using this tool, install the Python dependency package <a href="https://pypi.org/project/cassandra-driver/" target="_blank" rel="noopener noreferrer">cassandra-driver</a> 3.11.0 or later.</li></ul>
<div class="section" id="nosql_02_0005__section45253223112"><h4 class="sectiontitle">Prerequisites</h4><ul id="nosql_02_0005__ul3360182717119"><li id="nosql_02_0005__li203601427316">Create an <span id="nosql_02_0005__text892012516537">ECS</span><span id="nosql_02_0005__text159212051115319"></span> running Linux. For details, see "Creating ECSs" in <em id="nosql_02_0005__i1911412210188"><span id="nosql_02_0005__text3805010175417">ECS</span><span id="nosql_02_0005__text68051108547"></span> User Guide</em>.</li><li id="nosql_02_0005__li65523118612">Obtain the Cassandra client installation package from the Cassandra official website.</li><li id="nosql_02_0005__li81904414417">Before using this tool, install the Python dependency package <a href="https://pypi.org/project/cassandra-driver/" target="_blank" rel="noopener noreferrer">cassandra-driver</a> 3.11.0 or later.</li></ul>
</div>
<div class="section" id="nosql_02_0005__section398995894218"><h4 class="sectiontitle">Using the Cassandra Client Tool to Connect to a DB Instance</h4><ol id="nosql_02_0005__o12386b3d9147482881ddfdfd9a3f787c"><li id="nosql_02_0005__li15904581714"><span>Log in to the <span id="nosql_02_0005__text834714311399">ECS</span><span id="nosql_02_0005__text136127447919"></span>. For details, see the section "Logging In to an <span id="nosql_02_0005__text16983116185514">ECS</span><span id="nosql_02_0005__text19709131915512"></span>" in the <em id="nosql_02_0005__i114541240152112">Elastic Cloud Server User Guide</em>.</span></li><li id="nosql_02_0005__li44786699134732"><span>Upload the Cassandra client installation package to <span id="nosql_02_0005__text108271128185510">ECS</span><span id="nosql_02_0005__text67193225516"></span>.</span></li><li id="nosql_02_0005__li19981956102810"><span>Obtain the client tool cqlsh.</span></li><li id="nosql_02_0005__lf50bb4c0b07747cfac89f74cc2b28b4a"><span>Connect to the <span class="keyword" id="nosql_02_0005__keyword16862161145215">DB instance</span> in the directory where the cqlsh tool is located.</span><p><p id="nosql_02_0005__p58615126331"><strong id="nosql_02_0005__b17344655163311">./cqlsh</strong> &lt;<em id="nosql_02_0005__i11661450153816">DB_HOST</em>&gt; &lt;<em id="nosql_02_0005__i19166195013811">DB_PORT</em>&gt; <strong id="nosql_02_0005__b5166135003817">-u</strong> &lt;<em id="nosql_02_0005__i316615063813">DB_USER</em>&gt;</p>
<p id="nosql_02_0005__p14852035134">Example:</p>
@ -20,24 +20,24 @@
</div>
<div class="section" id="nosql_02_0005__section5552123017145"><h4 class="sectiontitle"><strong id="nosql_02_0005__b1868147135515">Follow-up Operations</strong></h4><p id="nosql_02_0005__p68055368143">After logging in to the <span id="nosql_02_0005__text1258443141717">GeminiDB Cassandra</span> instance, you can perform the following operations:</p>
<ul id="nosql_02_0005__ul13646161414318"><li id="nosql_02_0005__li564614147431">Run the <strong id="nosql_02_0005__b87038376558">HELP</strong> command to view all supported commands.</li></ul>
<ul id="nosql_02_0005__ul1511182454315"><li id="nosql_02_0005__li171118245432"><strong id="nosql_02_0005__b3686329563">HELP</strong><em id="nosql_02_0005__i10790114120567"> &lt;COMMAND&gt;</em>: This command queries the usage of a command. Example: <strong id="nosql_02_0005__b5647184894712">HELP DESC</strong></li><li id="nosql_02_0005__li16722142313237">Keyspace syntax<ul id="nosql_02_0005__ul518915524342"><li id="nosql_02_0005__li2055193415351">Create a keyspace. Example:<p id="nosql_02_0005__p940934216355"><a name="nosql_02_0005__li2055193415351"></a><a name="li2055193415351"></a><strong id="nosql_02_0005__b99070472352">CREATE KEYSPACE IF NOT EXISTS nosql WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '3'};</strong></p>
<p id="nosql_02_0005__p1871773722315">Set the keyspace name to <strong id="nosql_02_0005__b4410103718484">nosql</strong>, <strong id="nosql_02_0005__b1487952219505">replication</strong> to <strong id="nosql_02_0005__b18526191625016">SimpleStrategy</strong>, and number of replicas to <strong id="nosql_02_0005__b1914519513503">3</strong>.</p>
<ul id="nosql_02_0005__ul1511182454315"><li id="nosql_02_0005__li171118245432"><strong id="nosql_02_0005__b3686329563">HELP</strong><em id="nosql_02_0005__i10790114120567"> &lt;COMMAND&gt;</em>: This command queries the usage of a command. Example: <strong id="nosql_02_0005__b5647184894712">HELP DESC</strong></li><li id="nosql_02_0005__li16722142313237">Keyspace syntax<ul id="nosql_02_0005__ul518915524342"><li id="nosql_02_0005__li2055193415351">Create a keyspace, for example:<p id="nosql_02_0005__p940934216355"><a name="nosql_02_0005__li2055193415351"></a><a name="li2055193415351"></a><strong id="nosql_02_0005__b99070472352">CREATE KEYSPACE IF NOT EXISTS test_keyspace WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '3'};</strong></p>
<p id="nosql_02_0005__p1871773722315">Set the keyspace name to <strong id="nosql_02_0005__b4410103718484">test_keyspace</strong>, <strong id="nosql_02_0005__b1487952219505">replication</strong> to <strong id="nosql_02_0005__b18526191625016">SimpleStrategy</strong>, and number of replicas to <strong id="nosql_02_0005__b1914519513503">3</strong>.</p>
</li><li id="nosql_02_0005__li0440194092519"><strong id="nosql_02_0005__b139755935016">DESC</strong> <em id="nosql_02_0005__i54071521516">&lt;keyspace_name&gt;</em>: This command verifies the creation result.</li><li id="nosql_02_0005__li10716132819307"><strong id="nosql_02_0005__b638116013522">use</strong> <em id="nosql_02_0005__i27585395218">&lt;keyspace_name&gt;</em>: This command switches to the keyspace you created.</li><li id="nosql_02_0005__li1996263723912"><strong id="nosql_02_0005__b127971840185213">DROP</strong> <strong id="nosql_02_0005__b19552184316524">KEYSPACE</strong> <em id="nosql_02_0005__i65055468529">&lt;keyspace_name&gt;</em>: This command deletes the keyspace you created.</li></ul>
</li><li id="nosql_02_0005__li15808191519345">Table syntax<ul id="nosql_02_0005__ul4145928174917"><li id="nosql_02_0005__li5633204711360">Create a table. Example:<p id="nosql_02_0005__p1128093811492"><a name="nosql_02_0005__li5633204711360"></a><a name="li5633204711360"></a><strong id="nosql_02_0005__b11608174274910">CREATE TABLE nosql_table(user_id int, age int, user_name text, PRIMARY KEY(user_id));</strong></p>
<p id="nosql_02_0005__p14202194110568">The table name is <strong id="nosql_02_0005__b824911785514">nosql_table</strong>, and the following three columns are defined: <strong id="nosql_02_0005__b113071712175516">user_id</strong>, <strong id="nosql_02_0005__b17310181614559">age</strong>, and <strong id="nosql_02_0005__b856217201556">user_name</strong>. <strong id="nosql_02_0005__b2013442805515">user_id</strong> is of the int type and indicates the user ID. <strong id="nosql_02_0005__b1762394055514">age</strong> is of the int type and indicates the age of a user. <strong id="nosql_02_0005__b471717585555">user_name</strong> is of the text type and indicates the user name. The primary key is <strong id="nosql_02_0005__b9274101855617">user_id</strong>.</p>
</li><li id="nosql_02_0005__li651814468551"><strong id="nosql_02_0005__b179941321195612">DESC</strong> <em id="nosql_02_0005__i7995192112564">&lt;table_name&gt;</em>: This command verifies the creation result.</li><li id="nosql_02_0005__li422284416563">Insert data into the table. Example:<p id="nosql_02_0005__p87659381909"><a name="nosql_02_0005__li422284416563"></a><a name="li422284416563"></a><strong id="nosql_02_0005__b31291453562">INSERT INTO nosql_table (user_id, age, user_name) VALUES (1, 10, 'user1');</strong></p>
<p id="nosql_02_0005__p12981067516"><strong id="nosql_02_0005__b14138353161">INSERT INTO nosql_table (user_id, age, user_name) VALUES (2, 20, 'user2');</strong></p>
<p id="nosql_02_0005__p1249212711518"><strong id="nosql_02_0005__b61425531665">INSERT INTO nosql_table (user_id, age, user_name) VALUES (3, 30, 'user3');</strong></p>
</li><li id="nosql_02_0005__li144811536301"><strong id="nosql_02_0005__b1780561575711">SELECT * FROM</strong> <em id="nosql_02_0005__i1773081925710">&lt;table_name&gt;</em>: This command queries table data.</li><li id="nosql_02_0005__li26671151181414">Add a column to the table. Example<p id="nosql_02_0005__p1783717131510"><a name="nosql_02_0005__li26671151181414"></a><a name="li26671151181414"></a><strong id="nosql_02_0005__b4509920141512">ALTER TABLE nosql_table ADD gender text;</strong></p>
</li><li id="nosql_02_0005__li157173354137">Insert data to the added column. Example:<p id="nosql_02_0005__p10953554175915"><a name="nosql_02_0005__li157173354137"></a><a name="li157173354137"></a><strong id="nosql_02_0005__b189541554175913">UPDATE nosql.nosql_table SET prename = 'user_prename1' WHERE user_id = 1;</strong></p>
<p id="nosql_02_0005__p29541354155916"><strong id="nosql_02_0005__b1395485425912">UPDATE nosql.nosql_table SET prename = 'user_prename2' WHERE user_id = 2;</strong></p>
<p id="nosql_02_0005__p139541154125917"><strong id="nosql_02_0005__b19954115405912">UPDATE nosql.nosql_table SET prename = 'user_prename3' WHERE user_id = 3;</strong></p>
</li><li id="nosql_02_0005__li1583971919196">Delete data in a keyspace. Example:<p id="nosql_02_0005__p7769414163513"><a name="nosql_02_0005__li1583971919196"></a><a name="li1583971919196"></a>Delete the age data of the user whose ID is <strong id="nosql_02_0005__b88051424751">1</strong>.</p>
<p id="nosql_02_0005__p650381772812"><strong id="nosql_02_0005__b9420145416353">DELETE age FROM nosql.nosql_table WHERE user_id=1;</strong></p>
</li><li id="nosql_02_0005__li15808191519345">Table syntax<ul id="nosql_02_0005__ul4145928174917"><li id="nosql_02_0005__li5633204711360">Create a table, for example:<p id="nosql_02_0005__p1128093811492"><a name="nosql_02_0005__li5633204711360"></a><a name="li5633204711360"></a><strong id="nosql_02_0005__b11608174274910">CREATE TABLE test_table(user_id int, age int, user_name text, PRIMARY KEY(user_id));</strong></p>
<p id="nosql_02_0005__p14202194110568"><strong id="nosql_02_0005__b104307285243">test_table</strong> is a table name defined by the following three columns: <strong id="nosql_02_0005__b2431202892412">user_id</strong>, <strong id="nosql_02_0005__b144313288249">age</strong>, and <strong id="nosql_02_0005__b15431172872411">user_name</strong>. <strong id="nosql_02_0005__b2013442805515">user_id</strong> indicates a user ID of the INT data type. <strong id="nosql_02_0005__b1762394055514">age</strong> indicates user age of the INT data type. <strong id="nosql_02_0005__b471717585555">user_name</strong> indicates a username of the TEXT data type. The primary key is <strong id="nosql_02_0005__b9274101855617">user_id</strong>.</p>
</li><li id="nosql_02_0005__li651814468551"><strong id="nosql_02_0005__b179941321195612">DESC</strong> <em id="nosql_02_0005__i7995192112564">&lt;table_name&gt;</em>: This command verifies the creation result.</li><li id="nosql_02_0005__li422284416563">Insert data into the table, for example:<p id="nosql_02_0005__p87659381909"><a name="nosql_02_0005__li422284416563"></a><a name="li422284416563"></a><strong id="nosql_02_0005__b31291453562">INSERT INTO test_table (user_id, age, user_name) VALUES (1, 10, 'user1');</strong></p>
<p id="nosql_02_0005__p12981067516"><strong id="nosql_02_0005__b14138353161">INSERT INTO test_table (user_id, age, user_name) VALUES (2, 20, 'user2');</strong></p>
<p id="nosql_02_0005__p1249212711518"><strong id="nosql_02_0005__b61425531665">INSERT INTO test_table (user_id, age, user_name) VALUES (3, 30, 'user3');</strong></p>
</li><li id="nosql_02_0005__li144811536301"><strong id="nosql_02_0005__b1780561575711">SELECT * FROM</strong> <em id="nosql_02_0005__i1773081925710">&lt;table_name&gt;</em>: This command queries table data.</li><li id="nosql_02_0005__li26671151181414">Add a column to the table, for example:<p id="nosql_02_0005__p1783717131510"><a name="nosql_02_0005__li26671151181414"></a><a name="li26671151181414"></a><strong id="nosql_02_0005__b4509920141512">ALTER TABLE test_table ADD gender text;</strong></p>
</li><li id="nosql_02_0005__li157173354137">Update data in a table of a keyspace, for example:<p id="nosql_02_0005__p10953554175915"><a name="nosql_02_0005__li157173354137"></a><a name="li157173354137"></a><strong id="nosql_02_0005__b189541554175913">UPDATE test_keyspace.test_table SET prename = 'user_prename1' WHERE user_id = 1;</strong></p>
<p id="nosql_02_0005__p29541354155916"><strong id="nosql_02_0005__b1395485425912">UPDATE test_keyspace.test_table SET prename = 'user_prename2' WHERE user_id = 2;</strong></p>
<p id="nosql_02_0005__p139541154125917"><strong id="nosql_02_0005__b19954115405912">UPDATE test_keyspace.test_table SET prename = 'user_prename3' WHERE user_id = 3;</strong></p>
</li><li id="nosql_02_0005__li1583971919196">Delete data from a table in a keyspace, for example:<p id="nosql_02_0005__p7769414163513"><a name="nosql_02_0005__li1583971919196"></a><a name="li1583971919196"></a>Delete the age data of the user whose ID is <strong id="nosql_02_0005__b88051424751">1</strong>.</p>
<p id="nosql_02_0005__p650381772812"><strong id="nosql_02_0005__b9420145416353">DELETE age FROM test_keyspace.test_table WHERE user_id=1;</strong></p>
<p id="nosql_02_0005__p20521197299">Delete the entire record of the user whose ID is <strong id="nosql_02_0005__b1682918501152">2</strong>.</p>
<p id="nosql_02_0005__p2040992116368"><strong id="nosql_02_0005__b164610253367">DELETE FROM nosql.nosql_table WHERE user_id=2;</strong></p>
</li><li id="nosql_02_0005__li564614457308">Clear all records in the table. Example:<p id="nosql_02_0005__p4124133673816"><a name="nosql_02_0005__li564614457308"></a><a name="li564614457308"></a><strong id="nosql_02_0005__b83562404385">TRUNCATE nosql.nosql_table;</strong></p>
</li><li id="nosql_02_0005__li1931831211318">Delete the entire table. Example:<p id="nosql_02_0005__p12912141519410"><a name="nosql_02_0005__li1931831211318"></a><a name="li1931831211318"></a><strong id="nosql_02_0005__b988016182430">DROP TABLE nosql.nosql_table;</strong></p>
<p id="nosql_02_0005__p2040992116368"><strong id="nosql_02_0005__b164610253367">DELETE FROM test_keyspace.test_table WHERE user_id=2;</strong></p>
</li><li id="nosql_02_0005__li564614457308">Clear all records in the table, for example:<p id="nosql_02_0005__p4124133673816"><a name="nosql_02_0005__li564614457308"></a><a name="li564614457308"></a><strong id="nosql_02_0005__b83562404385">TRUNCATE test_keyspace.test_table;</strong></p>
</li><li id="nosql_02_0005__li1931831211318">Delete an entire table, for example:<p id="nosql_02_0005__p12912141519410"><a name="nosql_02_0005__li1931831211318"></a><a name="li1931831211318"></a><strong id="nosql_02_0005__b988016182430">DROP TABLE test_keyspace.test_table;</strong></p>
</li></ul>
</li></ul>
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<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="nosql_02_0002.html">Creating a GeminiDB Cassandra Instance</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_02_0004.html">Configuring Security Group Rules</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_02_0005.html">Connecting to a GeminiDB Cassandra Instance Over Private Networks</a></strong><br>

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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="nosql_02_0010.html">Creating a GeminiDB Cassandra Instance</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_02_0008.html">Binding an EIP</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_02_0011.html">Configuring Security Group Rules</a></strong><br>

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<a name="nosql_02_0008"></a><a name="nosql_02_0008"></a>
<h1 class="topictitle1">Binding an EIP</h1>
<div id="body8662426"><div class="section" id="nosql_02_0008__en-us_topic_0221158678_section055104935914"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_02_0008__p1032713811296">The Elastic IP service provides independent public IP addresses and bandwidth for Internet access. After you create a <span id="nosql_02_0008__text191113494130">GeminiDB Cassandra</span> instance, you can bind an <span id="nosql_02_0008__text201121249101316"></span><span id="nosql_02_0008__text511217494132">EIP</span> to it to allow external access. If later you want to prohibit external access, you can also unbind the EIP from the DB instance.</p>
<div id="body8662426"><div class="section" id="nosql_02_0008__en-us_topic_0221158678_section055104935914"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_02_0008__p1032713811296">The Elastic IP service provides independent public IP addresses and bandwidth for Internet access. After you create a <span id="nosql_02_0008__text15547240181815">GeminiDB Cassandra</span> instance, you can bind an <span id="nosql_02_0008__text103171714709"></span><span id="nosql_02_0008__text1783910192006">EIP</span> to it to allow external access. If later you want to prohibit external access, you can also unbind the EIP from the DB instance.</p>
</div>
<div class="section" id="nosql_02_0008__en-us_topic_0221158678_section1130510262514"><h4 class="sectiontitle">Precautions</h4><ul id="nosql_02_0008__en-us_topic_0221158678_ul15712132844"><li id="nosql_02_0008__en-us_topic_0221158678_li13712152748">Before accessing a database, you need to apply for an <span id="nosql_02_0008__text878185913020">EIP</span><span id="nosql_02_0008__text207621521415"></span> on the VPC console. Then, add an inbound rule to allow the IP addresses or IP address ranges of ECSs. For details, see section <a href="nosql_02_0011.html">Configuring Security Group Rules</a>.</li><li id="nosql_02_0008__en-us_topic_0221158678_li137122023418">To change the <span id="nosql_02_0008__text8151144615"></span><span id="nosql_02_0008__text13927471815">EIP</span> that has been bound to a node, you need to unbind it from the node first.</li></ul>
</div>
<div class="section" id="nosql_02_0008__en-us_topic_0221158678_section1664218463351"><a name="nosql_02_0008__en-us_topic_0221158678_section1664218463351"></a><a name="en-us_topic_0221158678_section1664218463351"></a><h4 class="sectiontitle">Binding an <span id="nosql_02_0008__text677317341036">EIP</span><span id="nosql_02_0008__text1365018371130"></span></h4><ol id="nosql_02_0008__en-us_topic_0221158678_ol12603704105129"><li id="nosql_02_0008__en-us_topic_0221158678_li46324476105129"><span>On the <strong id="nosql_02_0008__b1212014012314">Instance Management</strong> page, click the target <span id="nosql_02_0008__text10788155761811">GeminiDB Cassandra</span> instance.</span></li><li id="nosql_02_0008__en-us_topic_0221158678_li38329011165953"><span>On the <strong id="nosql_02_0008__b111621855202311">Basic Information</strong> page, in the <strong id="nosql_02_0008__b1291573262410">Node Information</strong> area, locate the target node and click <strong id="nosql_02_0008__b1516414556239">Bind EIP</strong> in the <strong id="nosql_02_0008__b151651655182310">Operation</strong> column.</span></li><li id="nosql_02_0008__en-us_topic_0221158678_li14267104105129"><span>In the displayed dialog box, all available unbound <span id="nosql_02_0008__text17670198946"></span><span id="nosql_02_0008__text759019116412">EIP</span>s are listed. Select the required <span id="nosql_02_0008__text158311298417">EIP</span><span id="nosql_02_0008__text45317321444"></span> and click <strong id="nosql_02_0008__b176286480272">OK</strong>. If no available EIPs are displayed, click <strong id="nosql_02_0008__b38951514182820">View EIP</strong> and create an <span id="nosql_02_0008__text1216616536414"></span><span id="nosql_02_0008__text557511561347">EIP</span> on the VPC console.</span></li><li id="nosql_02_0008__en-us_topic_0221158678_li17560260102159"><span>In the <strong id="nosql_02_0008__b230629152419">EIP</strong> column, view the <span id="nosql_02_0008__text12233637355"></span><span id="nosql_02_0008__text7403640654">EIP</span> that is successfully bound.</span><p><p id="nosql_02_0008__en-us_topic_0221158678_p32760134103252">To unbind the EIP from the DB instance, see <a href="#nosql_02_0008__en-us_topic_0221158678_section1364313461356">Unbinding an EIP</a>.</p>
<div class="section" id="nosql_02_0008__en-us_topic_0221158678_section1664218463351"><a name="nosql_02_0008__en-us_topic_0221158678_section1664218463351"></a><a name="en-us_topic_0221158678_section1664218463351"></a><h4 class="sectiontitle">Binding an <span id="nosql_02_0008__text677317341036">EIP</span><span id="nosql_02_0008__text1365018371130"></span></h4><ol id="nosql_02_0008__en-us_topic_0221158678_ol12603704105129"><li id="nosql_02_0008__en-us_topic_0221158678_li46324476105129"><span>On the <strong id="nosql_02_0008__b12199193465418">Instances</strong> page, click the target <span id="nosql_02_0008__text10788155761811">GeminiDB Cassandra</span> instance.</span></li><li id="nosql_02_0008__en-us_topic_0221158678_li38329011165953"><span>On the <strong id="nosql_02_0008__b111621855202311">Basic Information</strong> page, in the <strong id="nosql_02_0008__b1291573262410">Node Information</strong> area, locate the target node and click <strong id="nosql_02_0008__b1516414556239">Bind EIP</strong> in the <strong id="nosql_02_0008__b151651655182310">Operation</strong> column.</span></li><li id="nosql_02_0008__en-us_topic_0221158678_li14267104105129"><span>In the displayed dialog box, all available unbound <span id="nosql_02_0008__text189031018043"></span><span id="nosql_02_0008__text1880702117414">EIP</span>s are listed. Select the required <span id="nosql_02_0008__text158311298417">EIP</span><span id="nosql_02_0008__text45317321444"></span> and click <strong id="nosql_02_0008__b176286480272">OK</strong>. If no available EIPs are displayed, click <strong id="nosql_02_0008__b38951514182820">View EIP</strong> and create an <span id="nosql_02_0008__text1216616536414"></span><span id="nosql_02_0008__text557511561347">EIP</span> on the VPC console.</span></li><li id="nosql_02_0008__en-us_topic_0221158678_li17560260102159"><span>In the <strong id="nosql_02_0008__b230629152419">EIP</strong> column, view the <span id="nosql_02_0008__text12233637355"></span><span id="nosql_02_0008__text7403640654">EIP</span> that is successfully bound.</span><p><p id="nosql_02_0008__en-us_topic_0221158678_p32760134103252">To unbind the EIP from the DB instance, see <a href="#nosql_02_0008__en-us_topic_0221158678_section1364313461356">Unbinding an EIP</a>.</p>
</p></li></ol>
</div>
<div class="section" id="nosql_02_0008__en-us_topic_0221158678_section1364313461356"><a name="nosql_02_0008__en-us_topic_0221158678_section1364313461356"></a><a name="en-us_topic_0221158678_section1364313461356"></a><h4 class="sectiontitle">Unbinding an <span id="nosql_02_0008__text953118521351"></span><span id="nosql_02_0008__text08017551058">EIP</span></h4><ol id="nosql_02_0008__en-us_topic_0221158678_ol31276680102616"><li id="nosql_02_0008__en-us_topic_0221158678_li35235350102616"><span>On the <strong id="nosql_02_0008__b18422024192516">Instance Management</strong> page, click the target <span id="nosql_02_0008__text68821820141919">GeminiDB Cassandra</span> instance.</span></li><li id="nosql_02_0008__en-us_topic_0221158678_li417442102629"><span>On the <strong id="nosql_02_0008__b19504185315256">Basic Information</strong> page, in the <strong id="nosql_02_0008__b15505105312252">Node Information</strong> area, locate the target node and click <strong id="nosql_02_0008__b3506135311251">Unbind EIP</strong> in the <strong id="nosql_02_0008__b450865392517">Operation</strong> column.</span></li><li id="nosql_02_0008__en-us_topic_0221158678_li56439840102720"><span>In the displayed dialog box, click <strong id="nosql_02_0008__b16671171517301">Yes</strong>.</span><p><p id="nosql_02_0008__en-us_topic_0221158678_p21771104103056">To bind an EIP to the DB instance again, see <a href="#nosql_02_0008__en-us_topic_0221158678_section1664218463351">Binding an EIP</a>.</p>
<div class="section" id="nosql_02_0008__en-us_topic_0221158678_section1364313461356"><a name="nosql_02_0008__en-us_topic_0221158678_section1364313461356"></a><a name="en-us_topic_0221158678_section1364313461356"></a><h4 class="sectiontitle">Unbinding an <span id="nosql_02_0008__text953118521351"></span><span id="nosql_02_0008__text08017551058">EIP</span></h4><ol id="nosql_02_0008__en-us_topic_0221158678_ol31276680102616"><li id="nosql_02_0008__en-us_topic_0221158678_li35235350102616"><span>On the <strong id="nosql_02_0008__b18422024192516">Instances</strong> page, click the target <span id="nosql_02_0008__text68821820141919">GeminiDB Cassandra</span> instance.</span></li><li id="nosql_02_0008__en-us_topic_0221158678_li417442102629"><span>On the <strong id="nosql_02_0008__b19504185315256">Basic Information</strong> page, in the <strong id="nosql_02_0008__b15505105312252">Node Information</strong> area, locate the target node and click <strong id="nosql_02_0008__b3506135311251">Unbind EIP</strong> in the <strong id="nosql_02_0008__b450865392517">Operation</strong> column.</span></li><li id="nosql_02_0008__en-us_topic_0221158678_li56439840102720"><span>In the displayed dialog box, click <strong id="nosql_02_0008__b16671171517301">Yes</strong>.</span><p><p id="nosql_02_0008__en-us_topic_0221158678_p21771104103056">To bind an EIP to the DB instance again, see <a href="#nosql_02_0008__en-us_topic_0221158678_section1664218463351">Binding an EIP</a>.</p>
</p></li></ol>
</div>
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<div id="body8662426"><div class="section" id="nosql_02_0009__en-us_topic_0221158680_section46429645141251"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_02_0009__en-us_topic_0221158680_p127651481575">You can use an <span id="nosql_02_0009__text1686619140715">ECS</span><span id="nosql_02_0009__text288521710710"></span> or local device to connect to a <span id="nosql_02_0009__text1393835471918">GeminiDB</span> instance over a public network.</p>
<p id="nosql_02_0009__en-us_topic_0221158680_p1112805719352">This section describes how to use a Linux <span id="nosql_02_0009__text73880273711">ECS</span><span id="nosql_02_0009__text139473291778"></span> to connect to a <span id="nosql_02_0009__text615711117209">GeminiDB Cassandra</span> instance over a public network.</p>
</div>
<div class="section" id="nosql_02_0009__section2038518412128"><h4 class="sectiontitle">Prerequisites</h4><ul id="nosql_02_0009__ul16851511181213"><li id="nosql_02_0009__li88517115122">Bind an <span id="nosql_02_0009__text135617373811">EIP</span><span id="nosql_02_0009__text48873422811"></span> to the <span id="nosql_02_0009__text83081120152016">GeminiDB Cassandra</span> instance node and set security group rules.</li><li id="nosql_02_0009__li16851211101216">Create an <span id="nosql_02_0009__text39343577714">ECS</span><span id="nosql_02_0009__text136831201187"></span> running Linux. For details, see "Creating <span id="nosql_02_0009__text17560519781">ECS</span><span id="nosql_02_0009__text336715221819"></span>s" in <em id="nosql_02_0009__i772014291347"><span id="nosql_02_0009__text2716029153414">ECS</span><span id="nosql_02_0009__text47188296345"></span> User Guide</em>.</li><li id="nosql_02_0009__li6851181116124">Obtain the Cassandra client installation package from the Cassandra official website.</li><li id="nosql_02_0009__li81904414417">Before using this tool, install the Python dependency package <a href="https://pypi.org/project/cassandra-driver/" target="_blank" rel="noopener noreferrer">cassandra-driver</a> 3.11.0 or later.</li></ul>
<div class="section" id="nosql_02_0009__section2038518412128"><h4 class="sectiontitle">Prerequisites</h4><ul id="nosql_02_0009__ul16851511181213"><li id="nosql_02_0009__li88517115122">Bind an <span id="nosql_02_0009__text135617373811">EIP</span><span id="nosql_02_0009__text48873422811"></span> to the <span id="nosql_02_0009__text83081120152016">GeminiDB Cassandra</span> instance node and set security group rules.</li><li id="nosql_02_0009__li16851211101216">Create an <span id="nosql_02_0009__text39343577714">ECS</span><span id="nosql_02_0009__text136831201187"></span> running Linux. For details, see "Creating <span id="nosql_02_0009__text17560519781">ECS</span><span id="nosql_02_0009__text336715221819"></span>s" in <em id="nosql_02_0009__i772014291347"><span id="nosql_02_0009__text15671023993">ECS</span><span id="nosql_02_0009__text9681923891"></span> User Guide</em>.</li><li id="nosql_02_0009__li6851181116124">Obtain the Cassandra client installation package from the Cassandra official website.</li><li id="nosql_02_0009__li81904414417">Before using this tool, install the Python dependency package <a href="https://pypi.org/project/cassandra-driver/" target="_blank" rel="noopener noreferrer">cassandra-driver</a> 3.11.0 or later.</li></ul>
</div>
<div class="section" id="nosql_02_0009__en-us_topic_0221158680_section11470653104612"><h4 class="sectiontitle">Connecting to a DB Instance Through a Cassandra Client</h4><ol id="nosql_02_0009__en-us_topic_0221158680_o12386b3d9147482881ddfdfd9a3f787c"><li id="nosql_02_0009__li11874152715149"><span>Log in to the <span id="nosql_02_0009__text251310246371">ECS</span><span id="nosql_02_0009__text145171241372"></span>. For details, see the section "Logging In to an <span id="nosql_02_0009__text952162443715">ECS</span><span id="nosql_02_0009__text652516247375"></span>" in the <em id="nosql_02_0009__i052714242375">Elastic Cloud Server User Guide</em>.</span></li><li id="nosql_02_0009__en-us_topic_0221158680_li44786699134732"><span>Upload the Cassandra client installation package to <span id="nosql_02_0009__text1121723273713">ECS</span><span id="nosql_02_0009__text0222123210373"></span>.</span></li><li id="nosql_02_0009__en-us_topic_0221158680_li19981956102810"><span>Obtain the client tool cqlsh.</span></li><li id="nosql_02_0009__en-us_topic_0221158680_lf50bb4c0b07747cfac89f74cc2b28b4a"><span>Connect to the <span class="keyword" id="nosql_02_0009__keyword16862161145215">DB instance</span> in the directory where the cqlsh tool is located.</span><p><p id="nosql_02_0009__en-us_topic_0221158680_p58615126331"><strong id="nosql_02_0009__en-us_topic_0221158680_b31651050133819">./cqlsh</strong> &lt;<em id="nosql_02_0009__en-us_topic_0221158680_i11661450153816">DB_HOST</em>&gt; &lt;<em id="nosql_02_0009__en-us_topic_0221158680_i19166195013811">DB_PORT</em>&gt; <strong id="nosql_02_0009__en-us_topic_0221158680_b5166135003817">-u</strong> &lt;<em id="nosql_02_0009__en-us_topic_0221158680_i316615063813">DB_USER</em>&gt;</p>
<div class="section" id="nosql_02_0009__en-us_topic_0221158680_section11470653104612"><h4 class="sectiontitle">Connecting to a DB Instance Through a Cassandra Client</h4><ol id="nosql_02_0009__en-us_topic_0221158680_o12386b3d9147482881ddfdfd9a3f787c"><li id="nosql_02_0009__li11874152715149"><span>Log in to the <span id="nosql_02_0009__text1594914139117">ECS</span><span id="nosql_02_0009__text15304141711118"></span>. For details, see the section "Logging In to an <span id="nosql_02_0009__text952162443715">ECS</span><span id="nosql_02_0009__text652516247375"></span>" in the <em id="nosql_02_0009__i052714242375">Elastic Cloud Server User Guide</em>.</span></li><li id="nosql_02_0009__en-us_topic_0221158680_li44786699134732"><span>Upload the Cassandra client installation package to <span id="nosql_02_0009__text7603282132">ECS</span><span id="nosql_02_0009__text435411113135"></span>.</span></li><li id="nosql_02_0009__en-us_topic_0221158680_li19981956102810"><span>Obtain the client tool cqlsh.</span></li><li id="nosql_02_0009__en-us_topic_0221158680_lf50bb4c0b07747cfac89f74cc2b28b4a"><span>Connect to the <span class="keyword" id="nosql_02_0009__keyword16862161145215">DB instance</span> in the directory where the cqlsh tool is located.</span><p><p id="nosql_02_0009__en-us_topic_0221158680_p58615126331"><strong id="nosql_02_0009__en-us_topic_0221158680_b31651050133819">./cqlsh</strong> &lt;<em id="nosql_02_0009__en-us_topic_0221158680_i11661450153816">DB_HOST</em>&gt; &lt;<em id="nosql_02_0009__en-us_topic_0221158680_i19166195013811">DB_PORT</em>&gt; <strong id="nosql_02_0009__en-us_topic_0221158680_b5166135003817">-u</strong> &lt;<em id="nosql_02_0009__en-us_topic_0221158680_i316615063813">DB_USER</em>&gt;</p>
<p id="nosql_02_0009__en-us_topic_0221158680_p14852035134">Example:</p>
<p id="nosql_02_0009__en-us_topic_0221158680_p1857117560114"><strong id="nosql_02_0009__en-us_topic_0221158680_b18173152910121">./cqlsh 192.168.1.8 8635 -u rwuser</strong></p>
<div class="note" id="nosql_02_0009__en-us_topic_0221158680_note21381431122218"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="nosql_02_0009__en-us_topic_0221158680_ul18138931152220"><li id="nosql_02_0009__en-us_topic_0221158680_li8735051125619"><em id="nosql_02_0009__i77716116323">&lt;DB_HOST&gt;</em> indicates the <span id="nosql_02_0009__text20183626161312"></span><span id="nosql_02_0009__text133910319135">EIP</span> of the node to be connected. Obtain the value from the <span class="uicontrol" id="nosql_02_0009__uicontrol59671057555"><b>EIP</b></span> column in the node list on the <span class="uicontrol" id="nosql_02_0009__uicontrol19683565516"><b>Basic Information</b></span> page.</li><li id="nosql_02_0009__en-us_topic_0221158680_li9743125175616"><em id="nosql_02_0009__i33414158321">&lt;DB_PORT&gt;</em> indicates the port number. The default value is <strong id="nosql_02_0009__b433481115520">8635</strong> and cannot be changed.</li><li id="nosql_02_0009__en-us_topic_0221158680_li10747135112566"><em id="nosql_02_0009__i573611180321">&lt;DB_USER&gt;</em> indicates the database account name. The default value is <strong id="nosql_02_0009__b18120171635419">rwuser</strong>.</li></ul>
@ -14,23 +14,23 @@
</p></li><li id="nosql_02_0009__en-us_topic_0221158680_li2356085813016"><span>Check the connection result. If the following information is displayed, the connection is successful.</span><p><pre class="screen" id="nosql_02_0009__en-us_topic_0221158680_screen430918289155">rwuser@cqlsh&gt;</pre>
</p></li></ol>
</div>
<div class="section" id="nosql_02_0009__en-us_topic_0221158680_section5552123017145"><h4 class="sectiontitle"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b1868147135515">Follow-up Operations</strong></h4><p id="nosql_02_0009__en-us_topic_0000001092187204_p68055368143">After logging in to the <span id="nosql_02_0009__en-us_topic_0000001092187204_text1258443141717">GeminiDB Cassandra</span> instance, you can perform the following operations:</p>
<ul id="nosql_02_0009__en-us_topic_0000001092187204_ul13646161414318"><li id="nosql_02_0009__en-us_topic_0000001092187204_li564614147431">Run the <strong id="nosql_02_0009__en-us_topic_0000001092187204_b87038376558">HELP</strong> command to view all supported commands.</li></ul>
<ul id="nosql_02_0009__en-us_topic_0000001092187204_ul1511182454315"><li id="nosql_02_0009__en-us_topic_0000001092187204_li171118245432"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b3686329563">HELP</strong><em id="nosql_02_0009__en-us_topic_0000001092187204_i10790114120567"> &lt;COMMAND&gt;</em>: This command queries the usage of a command. Example: <strong id="nosql_02_0009__en-us_topic_0000001092187204_b5647184894712">HELP DESC</strong></li><li id="nosql_02_0009__en-us_topic_0000001092187204_li16722142313237">Keyspace syntax<ul id="nosql_02_0009__en-us_topic_0000001092187204_ul518915524342"><li id="nosql_02_0009__en-us_topic_0000001092187204_li2055193415351">Create a keyspace. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p940934216355"><a name="nosql_02_0009__en-us_topic_0000001092187204_li2055193415351"></a><a name="en-us_topic_0000001092187204_li2055193415351"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b99070472352">CREATE KEYSPACE IF NOT EXISTS nosql WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '3'};</strong></p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p1871773722315">Set the keyspace name to <strong id="nosql_02_0009__en-us_topic_0000001092187204_b4410103718484">nosql</strong>, <strong id="nosql_02_0009__en-us_topic_0000001092187204_b1487952219505">replication</strong> to <strong id="nosql_02_0009__en-us_topic_0000001092187204_b18526191625016">SimpleStrategy</strong>, and number of replicas to <strong id="nosql_02_0009__en-us_topic_0000001092187204_b1914519513503">3</strong>.</p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li0440194092519"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b139755935016">DESC</strong> <em id="nosql_02_0009__en-us_topic_0000001092187204_i54071521516">&lt;keyspace_name&gt;</em>: This command verifies the creation result.</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li10716132819307"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b638116013522">use</strong> <em id="nosql_02_0009__en-us_topic_0000001092187204_i27585395218">&lt;keyspace_name&gt;</em>: This command switches to the keyspace you created.</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li1996263723912"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b127971840185213">DROP</strong> <strong id="nosql_02_0009__en-us_topic_0000001092187204_b19552184316524">KEYSPACE</strong> <em id="nosql_02_0009__en-us_topic_0000001092187204_i65055468529">&lt;keyspace_name&gt;</em>: This command deletes the keyspace you created.</li></ul>
<div class="section" id="nosql_02_0009__en-us_topic_0221158680_section5552123017145"><h4 class="sectiontitle">Follow-up Operations</h4><p id="nosql_02_0009__en-us_topic_0000001092187204_p68055368143">After logging in to the <span id="nosql_02_0009__en-us_topic_0000001092187204_text1258443141717">GeminiDB Cassandra</span> instance, you can perform the following operations:</p>
<ul id="nosql_02_0009__en-us_topic_0000001092187204_ul13646161414318"><li id="nosql_02_0009__en-us_topic_0000001092187204_li564614147431">Run the <strong id="nosql_02_0009__en-us_topic_0000001092187204_b148211364438">HELP</strong> command to view all supported commands.</li></ul>
<ul id="nosql_02_0009__en-us_topic_0000001092187204_ul1511182454315"><li id="nosql_02_0009__en-us_topic_0000001092187204_li171118245432">Run <strong id="nosql_02_0009__b17348931312">HELP</strong><em id="nosql_02_0009__i203483317112"> &lt;COMMAND&gt;</em> to query the usage of a command. Example: <strong id="nosql_02_0009__en-us_topic_0000001092187204_b944037111611">HELP DESC</strong></li><li id="nosql_02_0009__en-us_topic_0000001092187204_li16722142313237">Keyspace syntax<ul id="nosql_02_0009__en-us_topic_0000001092187204_ul518915524342"><li id="nosql_02_0009__en-us_topic_0000001092187204_li2055193415351">Create a keyspace. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p940934216355"><a name="nosql_02_0009__en-us_topic_0000001092187204_li2055193415351"></a><a name="en-us_topic_0000001092187204_li2055193415351"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b99070472352">CREATE KEYSPACE IF NOT EXISTS nosql WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '3'};</strong></p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p1871773722315">Set the keyspace name to <strong id="nosql_02_0009__b3875175313443">nosql</strong>, <strong id="nosql_02_0009__b18875453194419">replication</strong> to <strong id="nosql_02_0009__b3875185316441">SimpleStrategy</strong>, and <strong id="nosql_02_0009__b1875453144412">replication_factor</strong> to <strong id="nosql_02_0009__b178758538443">3</strong>.</p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li0440194092519">Run <strong id="nosql_02_0009__b1492944185513">DESC</strong> <em id="nosql_02_0009__i11929549555">&lt;keyspace_name&gt;</em> to verify the creation results.</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li10716132819307">Run <strong id="nosql_02_0009__b1667791611555">use</strong> <em id="nosql_02_0009__i467791615555">&lt;keyspace_name&gt;</em> to switch to the keyspace you created.</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li1996263723912">Run <strong id="nosql_02_0009__b5420152785513">DROP</strong> <strong id="nosql_02_0009__b14420132715518">KEYSPACE</strong> <em id="nosql_02_0009__i134201627185514">&lt;keyspace_name&gt;</em> to delete the keyspace you created.</li></ul>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li15808191519345">Table syntax<ul id="nosql_02_0009__en-us_topic_0000001092187204_ul4145928174917"><li id="nosql_02_0009__en-us_topic_0000001092187204_li5633204711360">Create a table. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p1128093811492"><a name="nosql_02_0009__en-us_topic_0000001092187204_li5633204711360"></a><a name="en-us_topic_0000001092187204_li5633204711360"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b11608174274910">CREATE TABLE nosql_table(user_id int, age int, user_name text, PRIMARY KEY(user_id));</strong></p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p14202194110568">The table name is <strong id="nosql_02_0009__en-us_topic_0000001092187204_b824911785514">nosql_table</strong>, and the following three columns are defined: <strong id="nosql_02_0009__en-us_topic_0000001092187204_b113071712175516">user_id</strong>, <strong id="nosql_02_0009__en-us_topic_0000001092187204_b17310181614559">age</strong>, and <strong id="nosql_02_0009__en-us_topic_0000001092187204_b856217201556">user_name</strong>. <strong id="nosql_02_0009__en-us_topic_0000001092187204_b2013442805515">user_id</strong> is of the int type and indicates the user ID. <strong id="nosql_02_0009__en-us_topic_0000001092187204_b1762394055514">age</strong> is of the int type and indicates the age of a user. <strong id="nosql_02_0009__en-us_topic_0000001092187204_b471717585555">user_name</strong> is of the text type and indicates the user name. The primary key is <strong id="nosql_02_0009__en-us_topic_0000001092187204_b9274101855617">user_id</strong>.</p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li651814468551"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b179941321195612">DESC</strong> <em id="nosql_02_0009__en-us_topic_0000001092187204_i7995192112564">&lt;table_name&gt;</em>: This command verifies the creation result.</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li422284416563">Insert data into the table. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p87659381909"><a name="nosql_02_0009__en-us_topic_0000001092187204_li422284416563"></a><a name="en-us_topic_0000001092187204_li422284416563"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b31291453562">INSERT INTO nosql_table (user_id, age, user_name) VALUES (1, 10, 'user1');</strong></p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p14202194110568"><strong id="nosql_02_0009__b10340131185718">nosql_table</strong> indicates the table name, and the following three columns are defined: <strong id="nosql_02_0009__b7340431115712">user_id</strong>, <strong id="nosql_02_0009__b234116318574">age</strong>, and <strong id="nosql_02_0009__b103416311579">user_name</strong>. <strong id="nosql_02_0009__b176881116105810">user_id</strong> is the user ID of the INT type. <strong id="nosql_02_0009__b19689816115813">age</strong> is the user age of the INT type. <strong id="nosql_02_0009__b106892016105811">user_name</strong> is the username of the TEXT type. The primary key is <strong id="nosql_02_0009__b8445341992627">user_id</strong>.</p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li651814468551">Run <strong id="nosql_02_0009__b12713183635813">DESC</strong> <em id="nosql_02_0009__i971493618588">&lt;table_name&gt;</em> to verify the creation results.</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li422284416563">Insert data into the table. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p87659381909"><a name="nosql_02_0009__en-us_topic_0000001092187204_li422284416563"></a><a name="en-us_topic_0000001092187204_li422284416563"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b31291453562">INSERT INTO nosql_table (user_id, age, user_name) VALUES (1, 10, 'user1');</strong></p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p12981067516"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b14138353161">INSERT INTO nosql_table (user_id, age, user_name) VALUES (2, 20, 'user2');</strong></p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p1249212711518"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b61425531665">INSERT INTO nosql_table (user_id, age, user_name) VALUES (3, 30, 'user3');</strong></p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li144811536301"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b1780561575711">SELECT * FROM</strong> <em id="nosql_02_0009__en-us_topic_0000001092187204_i1773081925710">&lt;table_name&gt;</em>: This command queries table data.</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li26671151181414">Add a column to the table. Example<p id="nosql_02_0009__en-us_topic_0000001092187204_p1783717131510"><a name="nosql_02_0009__en-us_topic_0000001092187204_li26671151181414"></a><a name="en-us_topic_0000001092187204_li26671151181414"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b4509920141512">ALTER TABLE nosql_table ADD gender text;</strong></p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li157173354137">Insert data to the added column. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p10953554175915"><a name="nosql_02_0009__en-us_topic_0000001092187204_li157173354137"></a><a name="en-us_topic_0000001092187204_li157173354137"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b189541554175913">UPDATE nosql.nosql_table SET prename = 'user_prename1' WHERE user_id = 1;</strong></p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li144811536301">Run <strong id="nosql_02_0009__b394175745814">SELECT * FROM</strong> <em id="nosql_02_0009__i169545720588">&lt;table_name&gt;</em> to query table data.</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li26671151181414">Add a column to the table. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p1783717131510"><a name="nosql_02_0009__en-us_topic_0000001092187204_li26671151181414"></a><a name="en-us_topic_0000001092187204_li26671151181414"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b4509920141512">ALTER TABLE nosql_table ADD gender text;</strong></p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li157173354137">Update data in a table of a keyspace. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p10953554175915"><a name="nosql_02_0009__en-us_topic_0000001092187204_li157173354137"></a><a name="en-us_topic_0000001092187204_li157173354137"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b189541554175913">UPDATE nosql.nosql_table SET prename = 'user_prename1' WHERE user_id = 1;</strong></p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p29541354155916"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b1395485425912">UPDATE nosql.nosql_table SET prename = 'user_prename2' WHERE user_id = 2;</strong></p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p139541154125917"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b19954115405912">UPDATE nosql.nosql_table SET prename = 'user_prename3' WHERE user_id = 3;</strong></p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li1583971919196">Delete data in a keyspace. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p7769414163513"><a name="nosql_02_0009__en-us_topic_0000001092187204_li1583971919196"></a><a name="en-us_topic_0000001092187204_li1583971919196"></a>Delete the age data of the user whose ID is <strong id="nosql_02_0009__en-us_topic_0000001092187204_b88051424751">1</strong>.</p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li1583971919196">Delete data from a table in a keyspace. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p7769414163513"><a name="nosql_02_0009__en-us_topic_0000001092187204_li1583971919196"></a><a name="en-us_topic_0000001092187204_li1583971919196"></a>Delete the age data of the user whose ID is <strong id="nosql_02_0009__b4403415092627">1</strong>.</p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p650381772812"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b9420145416353">DELETE age FROM nosql.nosql_table WHERE user_id=1;</strong></p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p20521197299">Delete the entire record of the user whose ID is <strong id="nosql_02_0009__en-us_topic_0000001092187204_b1682918501152">2</strong>.</p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p20521197299">Delete the entire record of the user whose ID is <strong id="nosql_02_0009__b159765503792627">2</strong>.</p>
<p id="nosql_02_0009__en-us_topic_0000001092187204_p2040992116368"><strong id="nosql_02_0009__en-us_topic_0000001092187204_b164610253367">DELETE FROM nosql.nosql_table WHERE user_id=2;</strong></p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li564614457308">Clear all records in the table. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p4124133673816"><a name="nosql_02_0009__en-us_topic_0000001092187204_li564614457308"></a><a name="en-us_topic_0000001092187204_li564614457308"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b83562404385">TRUNCATE nosql.nosql_table;</strong></p>
</li><li id="nosql_02_0009__en-us_topic_0000001092187204_li1931831211318">Delete the entire table. Example:<p id="nosql_02_0009__en-us_topic_0000001092187204_p12912141519410"><a name="nosql_02_0009__en-us_topic_0000001092187204_li1931831211318"></a><a name="en-us_topic_0000001092187204_li1931831211318"></a><strong id="nosql_02_0009__en-us_topic_0000001092187204_b988016182430">DROP TABLE nosql.nosql_table;</strong></p>

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<div class="section" id="nosql_02_0011__en-us_topic_0249811530_section9456131432010"><h4 class="sectiontitle"><strong id="nosql_02_0011__en-us_topic_0249811530_b622952211485">Precautions</strong></h4><ul id="nosql_02_0011__ul205571531163210"><li id="nosql_02_0011__li15557173173216">By default, you can create up to 500 security group rules. However, too many rules increase network latency for initial access, so it is recommended that you add no more than 50 rules for each security group.</li><li id="nosql_02_0011__li91454673219">To access a <span id="nosql_02_0011__text92192397449">GeminiDB Cassandra</span> instance from resources outside the security group, you need to configure an inbound rule to allow access to the <span id="nosql_02_0011__text1356754617444">GeminiDB Cassandra</span> instance.</li></ul>
</div>
<div class="section" id="nosql_02_0011__en-us_topic_0249811530_section9281154719202"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_02_0011__ol49383781586"><li id="nosql_02_0011__li93899141586"><span>Log in to the management console.</span></li><li id="nosql_02_0011__li1870917810588"><span>Click <span><img id="nosql_02_0011__image145037112071" src="en-us_image_0000001861844977.png"></span> in the upper left corner and select a region and a project.</span></li><li id="nosql_02_0011__li297543615857"><span>Click <strong id="nosql_02_0011__b137790324169">Service List</strong>. Under <strong id="nosql_02_0011__b47801432121612">Network</strong>, click <strong id="nosql_02_0011__b978203271615">Virtual Private Cloud</strong>.</span></li><li id="nosql_02_0011__li3171015115916"><span>In the navigation pane on the left, choose <span class="menucascade" id="nosql_02_0011__en-us_topic_0249811530_menucascade113137392162"><b><span class="uicontrol" id="nosql_02_0011__uicontrol931312398163">Access Control</span></b> &gt; <b><span class="uicontrol" id="nosql_02_0011__uicontrol103131952161613">Security Groups</span></b></span>.</span></li><li id="nosql_02_0011__li140569415930"><span>On the <strong id="nosql_02_0011__en-us_topic_0249811530_b497332911519">Security Groups</strong> page, click the security group name.</span></li><li id="nosql_02_0011__li5489049115946"><span>On the <strong id="nosql_02_0011__en-us_topic_0249811530_b4976153713515">Inbound Rules</strong> tab, click <strong id="nosql_02_0011__en-us_topic_0249811530_b1697715371258">Add Rule</strong>. In the displayed <strong id="nosql_02_0011__en-us_topic_0249811530_b297743711512">Add Inbound Rule</strong> dialog box, set required parameters to add inbound rules. On the <strong id="nosql_02_0011__en-us_topic_0249811530_b271817563411">Outbound Rules</strong> tab, click <strong id="nosql_02_0011__en-us_topic_0249811530_b37191456543">Add Rule</strong>. In the displayed <strong id="nosql_02_0011__en-us_topic_0249811530_b37191156048">Add Outbound Rule</strong> dialog box, set required parameters to add outbound rules.</span></li><li id="nosql_02_0011__li186941447135716"><span>In the displayed dialog box, set required parameters.</span></li><li id="nosql_02_0011__li21369327151121"><span>Click <strong id="nosql_02_0011__b1897812399275">OK</strong>.</span></li></ol>
<div class="section" id="nosql_02_0011__en-us_topic_0249811530_section9281154719202"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_02_0011__ol49383781586"><li id="nosql_02_0011__li93899141586"><span>Log in to the management console.</span></li><li id="nosql_02_0011__li1870917810588"><span>Click <span><img id="nosql_02_0011__image145037112071" src="en-us_image_0000001861844977.png"></span> in the upper left corner and select a region and a project.</span></li><li id="nosql_02_0011__li297543615857"><span>Click <strong id="nosql_02_0011__b1366210549553">Service List</strong>. Under <strong id="nosql_02_0011__b1966319541559">Network</strong>, click <strong id="nosql_02_0011__b11664155413553">Virtual Private Cloud</strong>.</span></li><li id="nosql_02_0011__li3171015115916"><span>In the navigation pane on the left, choose <span class="menucascade" id="nosql_02_0011__en-us_topic_0249811530_menucascade113137392162"><b><span class="uicontrol" id="nosql_02_0011__uicontrol931312398163">Access Control</span></b> &gt; <b><span class="uicontrol" id="nosql_02_0011__uicontrol103131952161613">Security Groups</span></b></span>.</span></li><li id="nosql_02_0011__li140569415930"><span>On the <strong id="nosql_02_0011__en-us_topic_0249811530_b497332911519">Security Groups</strong> page, click the security group name.</span></li><li id="nosql_02_0011__li5489049115946"><span>On the <strong id="nosql_02_0011__en-us_topic_0249811530_b4976153713515">Inbound Rules</strong> tab, click <strong id="nosql_02_0011__en-us_topic_0249811530_b1697715371258">Add Rule</strong>. In the displayed <strong id="nosql_02_0011__en-us_topic_0249811530_b297743711512">Add Inbound Rule</strong> dialog box, set required parameters to add inbound rules. On the <strong id="nosql_02_0011__en-us_topic_0249811530_b271817563411">Outbound Rules</strong> tab, click <strong id="nosql_02_0011__en-us_topic_0249811530_b37191456543">Add Rule</strong>. In the displayed <strong id="nosql_02_0011__en-us_topic_0249811530_b37191156048">Add Outbound Rule</strong> dialog box, set required parameters to add outbound rules.</span></li><li id="nosql_02_0011__li186941447135716"><span>In the displayed dialog box, set required parameters.</span></li><li id="nosql_02_0011__li21369327151121"><span>Click <strong id="nosql_02_0011__b1897812399275">OK</strong>.</span></li></ol>
</div>
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</li>
<li class="ulchildlink"><strong><a href="nosql_increase_storage.html">Scaling Up Storage Space</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_increase_storage1.html">Configuring Auto Scale</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0026.html">Changing a DB Instance Class</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_increase_nodes.html">Adding Nodes</a></strong><br>

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</div>
<div class="section" id="nosql_03_0003__section21767336109"><h4 class="sectiontitle">Precautions</h4><ul id="nosql_03_0003__ul967204916135"><li id="nosql_03_0003__li102311055111311">If the instance status is <strong id="nosql_03_0003__b38411652172211">Available</strong>, <strong id="nosql_03_0003__b188427528228">Abnormal</strong>, or <strong id="nosql_03_0003__b13843452142220">Checking restoration</strong>, you can restart the instance.</li><li id="nosql_03_0003__li10826202141410">Restarting a DB instance interrupts services, so exercise caution when performing this operation.</li><li id="nosql_03_0003__li1567215497138">If you restart a DB instance, all nodes in the instance are also restarted.</li></ul>
</div>
<div class="section" id="nosql_03_0003__section12938418257"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0003__o5cd45f465a3b474dbdc23954ed769939"><li id="nosql_03_0003__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0003__l3f1dae48c6be4c238d5a22b49431a5a6"><span>On the <strong id="nosql_03_0003__b36540818397">Instance Management</strong> page, locate the DB instance you wish to restart and choose <strong id="nosql_03_0003__b10655880390">More</strong> &gt; <strong id="nosql_03_0003__b065648193918">Restart</strong> in the <strong id="nosql_03_0003__b165620818391">Operation</strong> column.</span><p><p id="nosql_03_0003__p9615143515481">Alternatively, click the DB instance you wish to restart, and on the displayed <strong id="nosql_03_0003__b116821234161515">Basic Information</strong> page, click <strong id="nosql_03_0003__b146820346157">Restart</strong> in the upper right corner of the page.</p>
<div class="section" id="nosql_03_0003__section12938418257"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0003__o5cd45f465a3b474dbdc23954ed769939"><li id="nosql_03_0003__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0003__l3f1dae48c6be4c238d5a22b49431a5a6"><span>On the <strong id="nosql_03_0003__b36540818397">Instances</strong> page, locate the DB instance you wish to restart and choose <strong id="nosql_03_0003__b10655880390">More</strong> &gt; <strong id="nosql_03_0003__b065648193918">Restart</strong> in the <strong id="nosql_03_0003__b165620818391">Operation</strong> column.</span><p><p id="nosql_03_0003__p9615143515481">Alternatively, click the DB instance you wish to restart, and on the displayed <strong id="nosql_03_0003__b116821234161515">Basic Information</strong> page, click <strong id="nosql_03_0003__b146820346157">Restart</strong> in the upper right corner of the page.</p>
</p></li><li id="nosql_03_0003__l57619a6f46fb4d3da03a966e6e197e54"><span>In the displayed dialog box, click <span class="parmname" id="nosql_03_0003__parmname76964790591510"><b>Yes</b></span>.</span></li></ol>
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<div class="section" id="nosql_03_0004__section16705648195219"><h4 class="sectiontitle">Precautions</h4><p id="nosql_03_0004__p63335104291">Deleted nodes cannot be recovered. Exercise caution when performing this operation.</p>
</div>
<div class="section" id="nosql_03_0004__section79281543052"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0004__ol1470917142592"><li id="nosql_03_0004__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_03_0004__li1871461413595"><span>On the <strong id="nosql_03_0004__b179133239211">Instance Management</strong> page, click the instance whose nodes you wish to delete.</span></li><li id="nosql_03_0004__li19716514155911"><span>In the <strong id="nosql_03_0004__b1752456595">Node Information</strong> area on the <strong id="nosql_03_0004__b177652470592">Basic Information</strong> page, locate the node you wish to delete and click <strong id="nosql_03_0004__b1175145175920">Delete</strong> in the <strong id="nosql_03_0004__b197825343010">Operation</strong> column.</span></li><li id="nosql_03_0004__li17718141416595"><span>In the displayed dialog box, click <span class="parmname" id="nosql_03_0004__parmname5963289311"><b>Yes</b></span>.</span><p><ul id="nosql_03_0004__ul14553114120550"><li id="nosql_03_0004__li10553184135515">The status of the instance in the instance list is <strong id="nosql_03_0004__b12614317314">Deleting node</strong>.</li><li id="nosql_03_0004__li55531241105510">After the deletion, the instance status becomes <strong id="nosql_03_0004__b524811489345">Available</strong>.</li></ul>
<div class="section" id="nosql_03_0004__section79281543052"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0004__ol1470917142592"><li id="nosql_03_0004__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0004__li1871461413595"><span>On the <strong id="nosql_03_0004__b20893552112619">Instances</strong> page, locate the target instance and click its name.</span></li><li id="nosql_03_0004__li19716514155911"><span>In the <strong id="nosql_03_0004__b1752456595">Node Information</strong> area on the <strong id="nosql_03_0004__b177652470592">Basic Information</strong> page, locate the node you wish to delete and click <strong id="nosql_03_0004__b1175145175920">Delete</strong> in the <strong id="nosql_03_0004__b197825343010">Operation</strong> column.</span></li><li id="nosql_03_0004__li17718141416595"><span>In the displayed dialog box, click <span class="parmname" id="nosql_03_0004__parmname5963289311"><b>Yes</b></span>.</span><p><ul id="nosql_03_0004__ul14553114120550"><li id="nosql_03_0004__li10553184135515">The status of the instance in the instance list is <strong id="nosql_03_0004__b12614317314">Deleting node</strong>.</li><li id="nosql_03_0004__li55531241105510">After the deletion, the instance status becomes <strong id="nosql_03_0004__b524811489345">Available</strong>.</li></ul>
</p></li></ol>
</div>
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<div class="section" id="nosql_03_0005__section446061684012"><h4 class="sectiontitle">Precautions</h4><ul id="nosql_03_0005__ul7767199204315"><li id="nosql_03_0005__li41417833194215">If you delete a DB instance, all the data in it and all automated backups are automatically deleted as well and cannot be restored, so exercise caution when performing this operation.</li><li id="nosql_03_0005__li88270310244">If you delete an instance, all nodes in the instance are also deleted.</li></ul>
</div>
<div class="section" id="nosql_03_0005__section18870192318343"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0005__ol9213165010343"><li id="nosql_03_0005__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_03_0005__l3af6a9cc8c404c93b5c915fc46a3aaac"><span>On the <strong id="nosql_03_0005__b9986947194511">Instance Management</strong> page, locate the DB instance you wish to delete and choose <strong id="nosql_03_0005__b986412415463">More</strong> &gt; <strong id="nosql_03_0005__b3378137164615">Delete</strong> in the <strong id="nosql_03_0005__b151943105469">Operation</strong> column.</span></li><li id="nosql_03_0005__li1895112033916"><span>On the displayed page, click <span class="uicontrol" id="nosql_03_0005__uicontrol1345370416853"><b>Yes</b></span>.</span><p><p id="nosql_03_0005__p202594174414">Deleted DB instances are not displayed in the instance list.</p>
<div class="section" id="nosql_03_0005__section18870192318343"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0005__ol9213165010343"><li id="nosql_03_0005__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0005__l3af6a9cc8c404c93b5c915fc46a3aaac"><span>On the <strong id="nosql_03_0005__b12537122319278">Instances</strong> page, locate the instance you want to delete and choose <strong id="nosql_03_0005__b18538162392717">More</strong> &gt; <strong id="nosql_03_0005__b155398238279">Delete</strong> in the <strong id="nosql_03_0005__b1254022312714">Operation</strong> column.</span></li><li id="nosql_03_0005__li1895112033916"><span>On the displayed page, click <span class="uicontrol" id="nosql_03_0005__uicontrol1345370416853"><b>Yes</b></span>.</span><p><p id="nosql_03_0005__p202594174414">Deleted DB instances are not displayed in the instance list.</p>
</p></li></ol>
</div>
</div>

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<a name="nosql_03_0007"></a><a name="nosql_03_0007"></a>
<h1 class="topictitle1">Managing Automated Backups</h1>
<div id="body1526616123141"><p id="nosql_03_0007__p3836659516932"><span id="nosql_03_0007__text4353550445">GeminiDB Cassandra</span> creates <span class="keyword" id="nosql_03_0007__keyword1965216361415">automated backups</span> to ensure data reliability. If a database or table is maliciously or accidentally deleted, backups can help you ensure you do not lose your data.</p>
<div id="body1526616123141"><p id="nosql_03_0007__p3836659516932"><span id="nosql_03_0007__text4353550445">GeminiDB Cassandra</span> API creates <span class="keyword" id="nosql_03_0007__keyword1965216361415">automated backups</span> to ensure data reliability. If a database or table is maliciously or accidentally deleted, backups can help you ensure you do not lose your data.</p>
<div class="section" id="nosql_03_0007__section7348925133816"><a name="nosql_03_0007__section7348925133816"></a><a name="section7348925133816"></a><h4 class="sectiontitle">Automated Backup Policy</h4><p id="nosql_03_0007__p18408122684015">Automated backups are generated according to a backup policy and saved as packages in OBS buckets to ensure data confidentiality and durability. You are advised to regularly back up your database, in case it becomes faulty or damaged. However, backing up data might affect the database read and write performance so it is recommended that you enable automated backups during off-peak hours.</p>
<div class="p" id="nosql_03_0007__p45253246447">When you create a DB instance, an automated backup policy is enabled by default.<ul id="nosql_03_0007__ul16853172910402"><li id="nosql_03_0007__li158431415454"><strong id="nosql_03_0007__b957602922310">Retention Period</strong>: Automated backup files are saved for seven days by default. The backup retention period can range from 1 to 35 days.<div class="note" id="nosql_03_0007__note11255195125010"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="nosql_03_0007__ul1074120237160"><li id="nosql_03_0007__li274142321612">If the retention period is less than seven days, the system automatically backs up data every day.</li><li class="msonormal" id="nosql_03_0007__li1582512175210">The system checks existing automated backup files and deletes the files that exceed the backup retention period you set.</li><li class="msonormal" id="nosql_03_0007__li13741823131611"><strong id="nosql_03_0007__b5252164916580">Time Window</strong>: An hour within 24 hours, such as 01:00-02:00 or 12:00-13:00. The backup time is in GMT format. If the DST or standard time is switched, the backup time segment changes with the time zone.</li></ul>
</div></div>
@ -11,10 +11,10 @@
</li><li class="msonormal" id="nosql_03_0007__li98537291401">After a DB instance is created, you can modify the automated backup policy as needed. You can change the time window after the DB instance is created. The system backs up data based on the automated backup policy you have set.</li><li id="nosql_03_0007__li26181725153018">If the automated backup policy is disabled, any automated backups in progress stop immediately.</li></ul>
</div>
</div>
<div class="section" id="nosql_03_0007__section20760141313178"><h4 class="sectiontitle">Modifying an Automated Backup Policy</h4><ol id="nosql_03_0007__ol2947132381714"><li id="nosql_03_0007__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li class="msonormal" id="nosql_03_0007__li2094772391716"><span>On the <span class="uicontrol" id="nosql_03_0007__uicontrol477024712299"><b>Instance Management</b></span> page, click the DB instance you wish to modify the policy for.</span></li><li class="msonormal" id="nosql_03_0007__li191115272176"><span>On the <span class="uicontrol" id="nosql_03_0007__uicontrol174011451132914"><b>Backups &amp; Restorations</b></span> page, click <span class="uicontrol" id="nosql_03_0007__uicontrol19403351102919"><b>Modify Backup Policy</b></span>. In the displayed dialog box, set the backup policy. Then, click <strong id="nosql_03_0007__b1157575012231">Yes</strong> to save the configuration.</span><p><p class="msonormal" id="nosql_03_0007__p127861032145811">For details about how to set a backup policy, see <a href="#nosql_03_0007__section7348925133816">Automated Backup Policy</a>.</p>
<div class="section" id="nosql_03_0007__section20760141313178"><h4 class="sectiontitle">Modifying an Automated Backup Policy</h4><ol id="nosql_03_0007__ol2947132381714"><li id="nosql_03_0007__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li class="msonormal" id="nosql_03_0007__li2094772391716"><span>On the <span class="uicontrol" id="nosql_03_0007__uicontrol477024712299"><b>Instances</b></span> page, click the DB instance you wish to modify the policy for.</span></li><li class="msonormal" id="nosql_03_0007__li191115272176"><span>On the <span class="uicontrol" id="nosql_03_0007__uicontrol174011451132914"><b>Backups &amp; Restorations</b></span> page, click <span class="uicontrol" id="nosql_03_0007__uicontrol19403351102919"><b>Modify Backup Policy</b></span>. In the displayed dialog box, set the backup policy. Then, click <strong id="nosql_03_0007__b1157575012231">Yes</strong> to save the configuration.</span><p><p class="msonormal" id="nosql_03_0007__p127861032145811">For details about how to set a backup policy, see <a href="#nosql_03_0007__section7348925133816">Automated Backup Policy</a>.</p>
</p></li><li id="nosql_03_0007__li1755121142419"><span>Check or manage the generated backups on the <strong id="nosql_03_0007__b583641433310">Backup Management</strong> page or on the <strong id="nosql_03_0007__b1657919235333">Backups &amp; Restorations</strong> page.</span></li></ol>
</div>
<div class="section" id="nosql_03_0007__section183408257484"><h4 class="sectiontitle">Disabling Automated Backup Policy</h4><ol id="nosql_03_0007__ol816443794818"><li id="nosql_03_0007__li15521418113"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li class="msonormal" id="nosql_03_0007__li7561139114819"><span>On the <span class="uicontrol" id="nosql_03_0007__uicontrol108349465474"><b>Instance Management</b></span> page, click the DB instance you wish to modify the policy for.</span></li><li class="msonormal" id="nosql_03_0007__li9561539174819"><span>On the <span class="uicontrol" id="nosql_03_0007__uicontrol125927323348"><b>Backups &amp; Restorations</b></span> page, click <span class="uicontrol" id="nosql_03_0007__uicontrol9592183243414"><b>Modify Backup Policy</b></span>.</span></li><li class="msonormal" id="nosql_03_0007__li41124215919"><span>In the displayed dialog box, click <span><img id="nosql_03_0007__image1579591812514" src="en-us_image_0000001815204936.png"></span> to disable the backup policy and click <strong id="nosql_03_0007__b12482105356">Yes</strong>.</span><p><div class="p" id="nosql_03_0007__p9767171951815">When disabling the automated backup policy, you can decide whether to delete the automated backups by selecting <strong id="nosql_03_0007__b154463598487">Delete automated backups</strong>.<ul id="nosql_03_0007__ul11589220161813"><li id="nosql_03_0007__li1129575005411">If you select it, all backup files within the retention period will be deleted. No automated backups are displayed in the backup list until you enable the automated backup policy again.</li><li id="nosql_03_0007__li25901420131819">If you do not select it, all backup files within the retention period will be retained, but you can still manually delete them later if needed. For details, see section <a href="#nosql_03_0007__section106721241354">Deleting an Automated Backup</a>.</li></ul>
<div class="section" id="nosql_03_0007__section183408257484"><h4 class="sectiontitle">Disabling Automated Backup Policy</h4><ol id="nosql_03_0007__ol816443794818"><li id="nosql_03_0007__li15521418113"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li class="msonormal" id="nosql_03_0007__li7561139114819"><span>On the <span class="uicontrol" id="nosql_03_0007__uicontrol108349465474"><b>Instances</b></span> page, click the DB instance you wish to modify the policy for.</span></li><li class="msonormal" id="nosql_03_0007__li9561539174819"><span>On the <span class="uicontrol" id="nosql_03_0007__uicontrol125927323348"><b>Backups &amp; Restorations</b></span> page, click <span class="uicontrol" id="nosql_03_0007__uicontrol9592183243414"><b>Modify Backup Policy</b></span>.</span></li><li class="msonormal" id="nosql_03_0007__li41124215919"><span>In the displayed dialog box, click <span><img id="nosql_03_0007__image1579591812514" src="en-us_image_0000001815204936.png"></span> to disable the backup policy and click <strong id="nosql_03_0007__b12482105356">Yes</strong>.</span><p><div class="p" id="nosql_03_0007__p9767171951815">When disabling the automated backup policy, you can decide whether to delete the automated backups by selecting <strong id="nosql_03_0007__b154463598487">Delete automated backups</strong>.<ul id="nosql_03_0007__ul11589220161813"><li id="nosql_03_0007__li1129575005411">If you select it, all backup files within the retention period will be deleted. No automated backups are displayed in the backup list until you enable the automated backup policy again.</li><li id="nosql_03_0007__li25901420131819">If you do not select it, all backup files within the retention period will be retained, but you can still manually delete them later if needed. For details, see section <a href="#nosql_03_0007__section106721241354">Deleting an Automated Backup</a>.</li></ul>
</div>
<p class="msonormal" id="nosql_03_0007__p14144201314514">If the automated backup policy is disabled, any automated backups in progress stop immediately.</p>
</p></li></ol>
@ -23,7 +23,7 @@
<p id="nosql_03_0007__p17461454161517">If the automated backup policy is enabled, the system will delete automated backups as they expire. You cannot delete them manually.</p>
<div class="notice" id="nosql_03_0007__note74761119183414"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="nosql_03_0007__p43244209111154">The deletion operation is irreversible, so exercise caution when performing this operation.</p>
</div></div>
<ul id="nosql_03_0007__ul11682203227"><li id="nosql_03_0007__li1968152012224"><strong id="nosql_03_0007__b54221939205114">Method 1</strong><ol id="nosql_03_0007__ol174832111454"><li class="msonormal" id="nosql_03_0007__li2482121119518">On the <span class="uicontrol" id="nosql_03_0007__uicontrol11591843195711"><b>Instance Management</b></span> page, click the DB instance you wish to delete backups for.</li><li class="msonormal" id="nosql_03_0007__li9483511655">On the <span class="uicontrol" id="nosql_03_0007__uicontrol10587164818578"><b>Backups &amp; Restorations</b></span> page, locate the backup you wish to delete and click <span class="uicontrol" id="nosql_03_0007__uicontrol135881548195713"><b>Delete</b></span>.</li><li id="nosql_03_0007__li20483181111519">In the <strong id="nosql_03_0007__b12781130135919">Delete Backup</strong> dialog box, confirm the backup information and click <strong id="nosql_03_0007__b131961445011">Yes</strong>.</li></ol>
<ul id="nosql_03_0007__ul11682203227"><li id="nosql_03_0007__li1968152012224"><strong id="nosql_03_0007__b54221939205114">Method 1</strong><ol id="nosql_03_0007__ol174832111454"><li class="msonormal" id="nosql_03_0007__li2482121119518">On the <span class="uicontrol" id="nosql_03_0007__uicontrol11591843195711"><b>Instances</b></span> page, click the DB instance you wish to delete backups for.</li><li class="msonormal" id="nosql_03_0007__li9483511655">On the <span class="uicontrol" id="nosql_03_0007__uicontrol10587164818578"><b>Backups &amp; Restorations</b></span> page, locate the backup you wish to delete and click <span class="uicontrol" id="nosql_03_0007__uicontrol135881548195713"><b>Delete</b></span>.</li><li id="nosql_03_0007__li20483181111519">In the <strong id="nosql_03_0007__b12781130135919">Delete Backup</strong> dialog box, confirm the backup information and click <strong id="nosql_03_0007__b131961445011">Yes</strong>.</li></ol>
</li><li id="nosql_03_0007__li115512472814"><strong id="nosql_03_0007__b785154318518">Method 2</strong><ol id="nosql_03_0007__ol6697163119286"><li id="nosql_03_0007__li146978318282">On the <span class="uicontrol" id="nosql_03_0007__uicontrol18815194815013"><b>Backup Management</b></span> page, locate the target backup and click <span class="uicontrol" id="nosql_03_0007__uicontrol38161848404"><b>Delete</b></span>.</li><li id="nosql_03_0007__li5881659103218">In the <strong id="nosql_03_0007__b1037513581114">Delete Backup</strong> dialog box, confirm the backup information and click <strong id="nosql_03_0007__b2037785813120">Yes</strong>.</li></ol>
</li></ul>
</div>

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@ -2,8 +2,8 @@
<h1 class="topictitle1">Setting Alarm Rules</h1>
<div id="body1559029599917"><div class="section" id="nosql_03_0012__section557353816557"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_03_0012__p3798241216545">You can set alarm rules to customize the monitored objects and notification policies and to stay aware of the database operating status.</p>
<p id="nosql_03_0012__p5667649816545">The alarm rules include alarm rule name, instance, metric, threshold, monitoring interval and whether to send notification. This section describes how to set alarm rules.</p>
<div class="note" id="nosql_03_0012__note1867348016759"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="nosql_03_0012__p3384359916759">For more information about <span id="nosql_03_0012__text027244152117">GeminiDB</span> alarm rules, see <em id="nosql_03_0012__i842352697151939">Cloud Eye User Guide</em>.</p>
<p id="nosql_03_0012__p5667649816545">The alarm rules include alarm rule names, monitored objects, metric, thresholds, monitoring intervals, and whether to send notifications. This section describes how to set an alarm rule.</p>
<div class="note" id="nosql_03_0012__note1867348016759"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="nosql_03_0012__p3384359916759">For more information about <span id="nosql_03_0012__text027244152117">GeminiDB</span> alarm rules, see <em id="nosql_03_0012__i15397104310206">Cloud Eye User Guide</em>.</p>
</div></div>
</div>
<div class="section" id="nosql_03_0012__section523623017417"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0012__en-us_topic_0249811497_ol3974733416629"><li id="nosql_03_0012__en-us_topic_0249811497_li1135564416629"><span>Log in to the management console.</span></li><li id="nosql_03_0012__en-us_topic_0249811497_li1341014816916"><span>After the alarm rule is set, the system automatically notifies you when an alarm is triggered.</span></li></ol>

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@ -1,7 +1,7 @@
<a name="nosql_03_0013"></a><a name="nosql_03_0013"></a>
<h1 class="topictitle1">Viewing Metrics</h1>
<div id="body1559024228376"><div class="section" id="nosql_03_0013__section6512256311344"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_03_0013__p4043621611344">Cloud Eye monitors <span id="nosql_03_0013__text18141640145414">GeminiDB</span> running statuses. You can obtain the monitoring metrics of <span id="nosql_03_0013__text1525818409210">GeminiDB</span> on the management console.</p>
<div id="body1559024228376"><div class="section" id="nosql_03_0013__section6512256311344"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_03_0013__p4043621611344">Cloud Eye monitors <span id="nosql_03_0013__text18141640145414">GeminiDB</span> running statuses. You can obtain the metrics of <span id="nosql_03_0013__text1525818409210">GeminiDB</span> on the management console.</p>
<p id="nosql_03_0013__p2838162511344">Monitored data requires a period of time for transmission and display. The status of the monitored object displayed on the Cloud Eye page is the status obtained 5 to 10 minutes before. You can view the monitored data of a newly created DB instance 5 to 10 minutes later.</p>
</div>
<div class="section" id="nosql_03_0013__section5410804111344"><h4 class="sectiontitle">Prerequisites</h4><ul id="nosql_03_0013__ul2067523211344"><li id="nosql_03_0013__li5185936011344">The DB instance is running properly.<p id="nosql_03_0013__p6408105811344"><a name="nosql_03_0013__li5185936011344"></a><a name="li5185936011344"></a>Cloud Eye does not display the metrics of a faulty or deleted DB instance. You can view the monitoring information only after the instance is restarted or recovered.</p>
@ -9,7 +9,7 @@
<ul id="nosql_03_0013__ul732244011344"><li id="nosql_03_0013__li6590196511344">The DB instance has been properly running for at least 10 minutes.<p id="nosql_03_0013__p5624677711344"><a name="nosql_03_0013__li6590196511344"></a><a name="li6590196511344"></a>The monitoring data and graphics are available for a new DB instance after the instance runs for at least 10 minutes.</p>
</li></ul>
</div>
<div class="section" id="nosql_03_0013__section4172512173619"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0013__ol15171327111423"><li id="nosql_03_0013__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li class="msonormal" id="nosql_03_0013__li15955104962211"><span>On the <span class="uicontrol" id="nosql_03_0013__uicontrol181969583180"><b>Instance Management</b></span> page, click the target DB instance.</span></li><li class="msonormal" id="nosql_03_0013__li11331353102219"><span>In the <strong id="nosql_03_0013__b13597970198">Node Information</strong> area on the <strong id="nosql_03_0013__b165977717199">Basic Information</strong> page, click <strong id="nosql_03_0013__b13597673197">View Metric</strong> in the <strong id="nosql_03_0013__b2059917181914">Operation</strong> column.</span></li><li id="nosql_03_0013__li5531726152619"><span>In the monitoring area, you can select a duration to view the monitoring data.</span><p><p id="nosql_03_0013__p753242610269">You can view the monitoring data of the service in the last 1, 3, or 12 hours.</p>
<div class="section" id="nosql_03_0013__section4172512173619"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0013__ol15171327111423"><li id="nosql_03_0013__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li class="msonormal" id="nosql_03_0013__li15955104962211"><span>On the <span class="uicontrol" id="nosql_03_0013__uicontrol181969583180"><b>Instance Management</b></span> page, click the target DB instance.</span></li><li class="msonormal" id="nosql_03_0013__li11331353102219"><span>In the <strong id="nosql_03_0013__b13597970198">Node Information</strong> area on the <strong id="nosql_03_0013__b165977717199">Basic Information</strong> page, click <strong id="nosql_03_0013__b13597673197">View Metric</strong> in the <strong id="nosql_03_0013__b2059917181914">Operation</strong> column.</span></li><li id="nosql_03_0013__li5531726152619"><span>In the monitoring area, you can select a duration to view the monitoring data.</span><p><p id="nosql_03_0013__p753242610269">You can view the monitoring data of the service in the last 1, 3, or 12 hours.</p>
<p id="nosql_03_0013__p1532626182614">To view the monitoring curve in a longer time range, click <span><img id="nosql_03_0013__image11543161913011" src="en-us_image_0000001815205036.png"></span> to enlarge the graph.</p>
</p></li></ol>
</div>

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@ -33,14 +33,14 @@
</table>
</div>
</div>
<div class="section" id="nosql_03_0014__section2359182316361"><h4 class="sectiontitle">Adding a Tag</h4><ol id="nosql_03_0014__ol5359172343612"><li id="nosql_03_0014__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_03_0014__li24670818113751"><span>On the <strong id="nosql_03_0014__b1377210177472">Instance Management</strong> page, click the instance you wish to add tags for to go to the <strong id="nosql_03_0014__b27732173472">Basic Information</strong> page.</span></li><li id="nosql_03_0014__li174993116615"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_03_0014__uicontrol17987141794610"><b>Tags</b></span>.</span></li><li id="nosql_03_0014__li3353879811230"><span>On the <span class="uicontrol" id="nosql_03_0014__uicontrol1874550010184218"><b>Tags</b></span> page, click <span class="uicontrol" id="nosql_03_0014__uicontrol202491323144718"><b>Add Tag</b></span>. In the displayed dialog box, enter a tag key and value, and click <span class="uicontrol" id="nosql_03_0014__uicontrol1307702785184613"><b>OK</b></span>.</span></li><li id="nosql_03_0014__li60539872152925"><span>View and manage tags on the <strong id="nosql_03_0014__b842352706112415">Tags</strong> page.</span></li></ol>
<div class="section" id="nosql_03_0014__section2359182316361"><h4 class="sectiontitle">Adding a Tag</h4><ol id="nosql_03_0014__ol5359172343612"><li id="nosql_03_0014__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0014__li24670818113751"><span>On the <strong id="nosql_03_0014__b11659172762818">Instances</strong> page, click the name of the target instance to go to the <strong id="nosql_03_0014__b1365902712811">Basic Information</strong> page.</span></li><li id="nosql_03_0014__li174993116615"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_03_0014__uicontrol17987141794610"><b>Tags</b></span>.</span></li><li id="nosql_03_0014__li3353879811230"><span>On the <span class="uicontrol" id="nosql_03_0014__uicontrol1874550010184218"><b>Tags</b></span> page, click <span class="uicontrol" id="nosql_03_0014__uicontrol202491323144718"><b>Add Tag</b></span>. In the displayed dialog box, enter a tag key and value, and click <span class="uicontrol" id="nosql_03_0014__uicontrol1307702785184613"><b>OK</b></span>.</span></li><li id="nosql_03_0014__li60539872152925"><span>View and manage tags on the <strong id="nosql_03_0014__b842352706112415">Tags</strong> page.</span></li></ol>
</div>
<div class="section" id="nosql_03_0014__section635902343611"><h4 class="sectiontitle">Editing a Tag</h4><ol id="nosql_03_0014__ol43606230360"><li id="nosql_03_0014__li65102056556"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_03_0014__li2667041916141"><span>On the <strong id="nosql_03_0014__b1753194813478">Instance Management</strong> page, click the instance you wish to add tags for to go to the <strong id="nosql_03_0014__b95404854716">Basic Information</strong> page.</span></li><li id="nosql_03_0014__li15532155318235"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_03_0014__uicontrol18562282465"><b>Tags</b></span>.</span></li><li id="nosql_03_0014__li64121748162643"><span>On the <span class="uicontrol" id="nosql_03_0014__uicontrol603655867151041"><b>Tags</b></span> page, locate the tag to be edited and click <span class="uicontrol" id="nosql_03_0014__uicontrol17467135384816"><b>Edit</b></span> in the <strong id="nosql_03_0014__b842352706112435">Operation</strong> column. In the displayed dialog box, change the tag value and click <span class="uicontrol" id="nosql_03_0014__uicontrol634740122121612"><b>OK</b></span>.</span><p><p id="nosql_03_0014__p18846056121019">Only the tag value can be edited when editing a tag.</p>
<div class="section" id="nosql_03_0014__section635902343611"><h4 class="sectiontitle">Editing a Tag</h4><ol id="nosql_03_0014__ol43606230360"><li id="nosql_03_0014__li65102056556"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0014__li2667041916141"><span>On the <strong id="nosql_03_0014__b1394113910329">Instances</strong> page, click the name of the target instance to go to the <strong id="nosql_03_0014__b1395103917322">Basic Information</strong> page.</span></li><li id="nosql_03_0014__li15532155318235"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_03_0014__uicontrol18562282465"><b>Tags</b></span>.</span></li><li id="nosql_03_0014__li64121748162643"><span>On the <span class="uicontrol" id="nosql_03_0014__uicontrol603655867151041"><b>Tags</b></span> page, locate the tag to be edited and click <span class="uicontrol" id="nosql_03_0014__uicontrol17467135384816"><b>Edit</b></span> in the <strong id="nosql_03_0014__b842352706112435">Operation</strong> column. In the displayed dialog box, change the tag value and click <span class="uicontrol" id="nosql_03_0014__uicontrol634740122121612"><b>OK</b></span>.</span><p><p id="nosql_03_0014__p18846056121019">Only the tag value can be edited when editing a tag.</p>
</p></li><li id="nosql_03_0014__li1611816116355"><span>View and manage tags on the <strong id="nosql_03_0014__b872755975318">Tags</strong> page.</span></li></ol>
</div>
<div class="section" id="nosql_03_0014__section15360623153611"><h4 class="sectiontitle">Deleting a Tag</h4><ol id="nosql_03_0014__ol7360152312366"><li id="nosql_03_0014__li7542281614"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_03_0014__li425579216842"><span>On the <strong id="nosql_03_0014__b14483164814812">Instance Management</strong> page, click the instance you wish to delete tags for to go to the <strong id="nosql_03_0014__b16484114812817">Basic Information</strong> page.</span></li><li id="nosql_03_0014__li194071459142311"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_03_0014__uicontrol8798152034620"><b>Tags</b></span>.</span></li><li id="nosql_03_0014__li1546527416842"><span>On the <span class="uicontrol" id="nosql_03_0014__uicontrol490988278122017"><b>Tags</b></span> page, locate the tag to be deleted and click <span class="uicontrol" id="nosql_03_0014__uicontrol307071211122017"><b>Delete</b></span> in the <strong id="nosql_03_0014__b61204432715310">Operation</strong> column. In the displayed dialog box, click <span class="uicontrol" id="nosql_03_0014__uicontrol1895435447122017"><b>Yes</b></span>.</span></li><li id="nosql_03_0014__li4831495916730"><span>After a tag has been deleted, it will not be displayed on the <strong id="nosql_03_0014__b1050953301112543">Tags</strong> page.</span></li></ol>
<div class="section" id="nosql_03_0014__section15360623153611"><h4 class="sectiontitle">Deleting a Tag</h4><ol id="nosql_03_0014__ol7360152312366"><li id="nosql_03_0014__li7542281614"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0014__li425579216842"><span>On the <strong id="nosql_03_0014__b172927558289">Instances</strong> page, click the name of the target instance to go to the <strong id="nosql_03_0014__b12932055152812">Basic Information</strong> page.</span></li><li id="nosql_03_0014__li194071459142311"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_03_0014__uicontrol8798152034620"><b>Tags</b></span>.</span></li><li id="nosql_03_0014__li1546527416842"><span>On the <span class="uicontrol" id="nosql_03_0014__uicontrol490988278122017"><b>Tags</b></span> page, locate the tag to be deleted and click <span class="uicontrol" id="nosql_03_0014__uicontrol307071211122017"><b>Delete</b></span> in the <strong id="nosql_03_0014__b61204432715310">Operation</strong> column. In the displayed dialog box, click <span class="uicontrol" id="nosql_03_0014__uicontrol1895435447122017"><b>Yes</b></span>.</span></li><li id="nosql_03_0014__li4831495916730"><span>After a tag has been deleted, it will not be displayed on the <strong id="nosql_03_0014__b1050953301112543">Tags</strong> page.</span></li></ol>
</div>
<div class="section" id="nosql_03_0014__section0260114175017"><h4 class="sectiontitle">Searching an Instance by Tag</h4><ol id="nosql_03_0014__ol528251920502"><li id="nosql_03_0014__li4939114913164"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_03_0014__li56671823135018"><span>On the <strong id="nosql_03_0014__b206245594914">Instance Management</strong> page, click <strong id="nosql_03_0014__b197330584491">Search by Tag</strong> in the upper right corner of the instance list.</span></li><li id="nosql_03_0014__li1692516132173"><span>Enter the key or value of the tag to be queried and click <strong id="nosql_03_0014__b112701324195019">Search</strong> to query the instance associated with the tag.</span></li></ol>
<div class="section" id="nosql_03_0014__section0260114175017"><h4 class="sectiontitle">Searching an Instance by Tag</h4><ol id="nosql_03_0014__ol528251920502"><li id="nosql_03_0014__li4939114913164"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0014__li56671823135018"><span>On the <strong id="nosql_03_0014__b1689713552917">Instances</strong> page, click <strong id="nosql_03_0014__b12898165132915">Search by Tag</strong> in the upper right corner of the instance list.</span></li><li id="nosql_03_0014__li1692516132173"><span>Enter the key or value of the tag to be queried and click <strong id="nosql_03_0014__b112701324195019">Search</strong> to query the instance associated with the tag.</span></li></ol>
</div>
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</div>
<div class="section" id="nosql_03_0016__section144201211043"><h4 class="sectiontitle">Precautions</h4><p id="nosql_03_0016__p32341312111918">If the instance status is <strong id="nosql_03_0016__b1931894425012">Available</strong>, <strong id="nosql_03_0016__b155471495316">Backing up</strong>, <strong id="nosql_03_0016__b73181044145011">Checking restoration</strong>, <strong id="nosql_03_0016__b9414943165112">Scaling up</strong> or certain nodes become abnormal, you can reset the administrator password.</p>
</div>
<div class="section" id="nosql_03_0016__section67781436332"><h4 class="sectiontitle">Method 1</h4><ol id="nosql_03_0016__en-us_topic_0052853250_ol12603704105129"><li id="nosql_03_0016__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0016__en-us_topic_0052853250_li46324476105129"><span>On the <strong id="nosql_03_0016__b650124115198">Instance Management</strong> page, locate the DB instance you wish to reset the password for and choose <strong id="nosql_03_0016__b2087606132116">More</strong> &gt; <strong id="nosql_03_0016__b10245613152119">Reset Password</strong> in the <strong id="nosql_03_0016__b2339316172111">Operation</strong> column.</span></li><li id="nosql_03_0016__en-us_topic_0052853250_li14267104105129"><span>Enter and confirm the new administrator password and click <strong id="nosql_03_0016__b186553692614">OK</strong>.</span><p><p id="nosql_03_0016__p28493595134038">The password must be 8 to 32 characters in length and contain uppercase letters, lowercase letters, digits, and any of the following special characters: ~!@#%^*-_=+?</p>
<div class="section" id="nosql_03_0016__section67781436332"><h4 class="sectiontitle">Method 1</h4><ol id="nosql_03_0016__en-us_topic_0052853250_ol12603704105129"><li id="nosql_03_0016__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0016__en-us_topic_0052853250_li46324476105129"><span>On the <strong id="nosql_03_0016__b650124115198">Instances</strong> page, locate the DB instance you wish to reset the password for and choose <strong id="nosql_03_0016__b2087606132116">More</strong> &gt; <strong id="nosql_03_0016__b10245613152119">Reset Password</strong> in the <strong id="nosql_03_0016__b2339316172111">Operation</strong> column.</span></li><li id="nosql_03_0016__en-us_topic_0052853250_li14267104105129"><span>Enter and confirm the new administrator password and click <strong id="nosql_03_0016__b186553692614">OK</strong>.</span><p><p id="nosql_03_0016__p28493595134038">The password must be 8 to 32 characters in length and contain uppercase letters, lowercase letters, digits, and any of the following special characters: ~!@#%^*-_=+?</p>
</p></li></ol>
</div>
<div class="section" id="nosql_03_0016__section7508172417352"><h4 class="sectiontitle">Method 2</h4><ol id="nosql_03_0016__ol14268133411353"><li id="nosql_03_0016__li370383693518"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0016__li10703143643516"><span>On the <strong id="nosql_03_0016__b20773243213">Instance Management</strong> page, click the DB instance you wish to reset the password for. The <strong id="nosql_03_0016__b20787218326">Basic Information</strong> page is displayed.</span></li><li id="nosql_03_0016__li1816012414367"><span>In the <strong id="nosql_03_0016__b525810347363">DB Information</strong> area, click <strong id="nosql_03_0016__b164061014123718">Reset Password</strong> in the <strong id="nosql_03_0016__b15139179373">Administrator</strong> field.</span></li><li id="nosql_03_0016__li712716203819"><span>Enter and confirm the new administrator password and click <strong id="nosql_03_0016__b16678412379">OK</strong>.</span><p><p id="nosql_03_0016__p1312715233814">The password must be 8 to 32 characters in length and contain uppercase letters, lowercase letters, digits, and any of the following special characters: ~!@#%^*-_=+?</p>
<div class="section" id="nosql_03_0016__section7508172417352"><h4 class="sectiontitle">Method 2</h4><ol id="nosql_03_0016__ol14268133411353"><li id="nosql_03_0016__li370383693518"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0016__li10703143643516"><span>On the <strong id="nosql_03_0016__b20773243213">Instances</strong> page, click the DB instance you wish to reset the password for. The <strong id="nosql_03_0016__b20787218326">Basic Information</strong> page is displayed.</span></li><li id="nosql_03_0016__li1816012414367"><span>In the <strong id="nosql_03_0016__b525810347363">DB Information</strong> area, click <strong id="nosql_03_0016__b164061014123718">Reset Password</strong> in the <strong id="nosql_03_0016__b15139179373">Administrator</strong> field.</span></li><li id="nosql_03_0016__li712716203819"><span>Enter and confirm the new administrator password and click <strong id="nosql_03_0016__b16678412379">OK</strong>.</span><p><p id="nosql_03_0016__p1312715233814">The password must be 8 to 32 characters in length and contain uppercase letters, lowercase letters, digits, and any of the following special characters: ~!@#%^*-_=+?</p>
</p></li></ol>
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<h1 class="topictitle1">Changing a DB Instance Name</h1>
<div id="body1574235229023"><div class="section" id="nosql_03_0025__section4282820218710"><h4 class="sectiontitle"><strong id="nosql_03_0025__b8322165010110">Scenarios</strong></h4><p id="nosql_03_0025__p4624798918714">This section describes how to change a <span id="nosql_03_0025__text1488017455316">GeminiDB Cassandra</span> instance name to identify different DB instances.</p>
</div>
<div class="section" id="nosql_03_0025__section1299663220553"><h4 class="sectiontitle">Method 1</h4><ol id="nosql_03_0025__ol099713320552"><li id="nosql_03_0025__li312682313217"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0025__li37133305512"><span>On the <strong id="nosql_03_0025__b14679185414218">Instance Management</strong> page, click <span><img id="nosql_03_0025__image93761715193113" src="en-us_image_0000001861925037.png"></span> to the right of the instance whose name you wish to change.</span><p><ul id="nosql_03_0025__ul174151959183410"><li id="nosql_03_0025__li314024118517">To submit the change, click <strong id="nosql_03_0025__b12128525231">OK</strong>.<p id="nosql_03_0025__p142311142256">The new name can be the same as an existing instance name. It must start with a letter and consist of 4 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.</p>
<div class="section" id="nosql_03_0025__section1299663220553"><h4 class="sectiontitle">Method 1</h4><ol id="nosql_03_0025__ol099713320552"><li id="nosql_03_0025__li312682313217"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0025__li37133305512"><span>On the <strong id="nosql_03_0025__b14679185414218">Instances</strong> page, click <span><img id="nosql_03_0025__image93761715193113" src="en-us_image_0000001861925037.png"></span> to the right of the instance whose name you wish to change.</span><p><ul id="nosql_03_0025__ul174151959183410"><li id="nosql_03_0025__li314024118517">To submit the change, click <strong id="nosql_03_0025__b12128525231">OK</strong>.<p id="nosql_03_0025__p142311142256">The new name can be the same as an existing instance name. It must start with a letter and consist of 4 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.</p>
</li><li id="nosql_03_0025__li198925111350">To cancel the change, click <strong id="nosql_03_0025__b16821531633">Cancel</strong>.</li></ul>
</p></li><li id="nosql_03_0025__li1515533115519"><span>View the results on the <strong id="nosql_03_0025__b16367133511318">Instance Management</strong> page.</span></li></ol>
</p></li><li id="nosql_03_0025__li1515533115519"><span>View the results on the <strong id="nosql_03_0025__b16367133511318">Instances</strong> page.</span></li></ol>
</div>
<div class="section" id="nosql_03_0025__section17860151411340"><h4 class="sectiontitle">Method 2</h4><ol id="nosql_03_0025__en-us_topic_0049044698_ol36506495172844"><li id="nosql_03_0025__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0025__en-us_topic_0049044698_li61161897172844"><span>On the <strong id="nosql_03_0025__b1258592618413">Instance Management</strong> page, click the instance whose name you wish to change.</span></li><li id="nosql_03_0025__en-us_topic_0049044698_li36398892172958"><span>In the <span class="uicontrol" id="nosql_03_0025__uicontrol2094142815418"><b>Instance Information</b></span> area on the <span class="uicontrol" id="nosql_03_0025__uicontrol894210287417"><b>Basic Information</b></span> page, click <span><img id="nosql_03_0025__image11766159183118" src="en-us_image_0000001815205188.png"></span> in the <span class="uicontrol" id="nosql_03_0025__uicontrol11942172810414"><b>DB Instance Name</b></span> field to change the instance name.</span><p><ul id="nosql_03_0025__en-us_topic_0049044698_ul55727369173557"><li id="nosql_03_0025__li1191115212810">To submit the change, click <span><img id="nosql_03_0025__image1819412521385" src="en-us_image_0000001815045404.png"></span>.<p id="nosql_03_0025__p917553089">The new name can be the same as an existing instance name. It must start with a letter and consist of 4 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.</p>
<div class="section" id="nosql_03_0025__section17860151411340"><h4 class="sectiontitle">Method 2</h4><ol id="nosql_03_0025__en-us_topic_0049044698_ol36506495172844"><li id="nosql_03_0025__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0025__en-us_topic_0049044698_li61161897172844"><span>On the <strong id="nosql_03_0025__b1258592618413">Instances</strong> page, click the instance whose name you wish to change.</span></li><li id="nosql_03_0025__en-us_topic_0049044698_li36398892172958"><span>In the <span class="uicontrol" id="nosql_03_0025__uicontrol2094142815418"><b>Instance Information</b></span> area on the <span class="uicontrol" id="nosql_03_0025__uicontrol894210287417"><b>Basic Information</b></span> page, click <span><img id="nosql_03_0025__image11766159183118" src="en-us_image_0000001815205188.png"></span> in the <span class="uicontrol" id="nosql_03_0025__uicontrol11942172810414"><b>DB Instance Name</b></span> field to change the instance name.</span><p><ul id="nosql_03_0025__en-us_topic_0049044698_ul55727369173557"><li id="nosql_03_0025__li1191115212810">To submit the change, click <span><img id="nosql_03_0025__image1819412521385" src="en-us_image_0000001815045404.png"></span>.<p id="nosql_03_0025__p917553089">The new name can be the same as an existing instance name. It must start with a letter and consist of 4 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.</p>
</li><li id="nosql_03_0025__li2013251975419">To cancel the change, click <span><img id="nosql_03_0025__image138776391547" src="en-us_image_0000001815045400.png"></span>.</li></ul>
</p></li><li id="nosql_03_0025__li9615074181926"><span>View the results on the <strong id="nosql_03_0025__b12111112518">Instance Management</strong> page.</span></li></ol>
</p></li><li id="nosql_03_0025__li9615074181926"><span>View the results on the <strong id="nosql_03_0025__b88590191818">Instances</strong> page.</span></li></ol>
</div>
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</div></div>
</li></ul>
</div>
<div class="section" id="nosql_03_0026__section1114123271918"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0026__ol1539545282314"><li id="nosql_03_0026__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_03_0026__li1871461413595"><span>On the <strong id="nosql_03_0026__b1338313554482">Instance Management</strong> page, click the DB instance you wish to change the CPU and memory for.</span></li><li id="nosql_03_0026__l3af6a9cc8c404c93b5c915fc46a3aaac"><span>In the in <strong id="nosql_03_0026__b1815633755614">DB Information</strong> area on the <strong id="nosql_03_0026__b17845104010566">Basic Information</strong> page, click <strong id="nosql_03_0026__b16153154520565">Change</strong> next to the <strong id="nosql_03_0026__b17935184819562">Instance Class</strong> field.</span></li><li id="nosql_03_0026__li1839625222311"><span>On the displayed page, select the desired vCPUs and memory and click <strong id="nosql_03_0026__b54778538206">Next</strong>.</span></li><li id="nosql_03_0026__li103961052112310"><span>On the displayed page, confirm the instance class.</span><p><ul id="nosql_03_0026__ul15396552132312"><li id="nosql_03_0026__li839615216237">If you need to modify your settings, click <strong id="nosql_03_0026__b1936610306501">Previous</strong> to go back to the page where you specify details.</li><li id="nosql_03_0026__li5396105220234">If you do not need to modify your settings, click <strong id="nosql_03_0026__b122490402500">Submit</strong> to change the instance class.</li></ul>
</p></li><li id="nosql_03_0026__li1839755210230"><span>View the DB instance class change result.</span><p><p id="nosql_03_0026__p871435315404">Go to the <strong id="nosql_03_0026__b155661414183910">Basic Information</strong> page and in the <strong id="nosql_03_0026__b15567171415398">DB Information</strong> area you can see the new instance class.</p>
<div class="section" id="nosql_03_0026__section1114123271918"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0026__ol1539545282314"><li id="nosql_03_0026__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0026__li1871461413595"><span>On the <strong id="nosql_03_0026__b1453171322319">Instances</strong> page, locate the target instance and click its name.</span></li><li id="nosql_03_0026__l3af6a9cc8c404c93b5c915fc46a3aaac"><span>In the in <strong id="nosql_03_0026__b1815633755614">DB Information</strong> area on the <strong id="nosql_03_0026__b17845104010566">Basic Information</strong> page, click <strong id="nosql_03_0026__b16153154520565">Change</strong> next to the <strong id="nosql_03_0026__b17935184819562">Specifications</strong> field.</span></li><li id="nosql_03_0026__li1839625222311"><span>On the displayed page, select the desired vCPUs and memory and click <strong id="nosql_03_0026__b54778538206">Next</strong>.</span></li><li id="nosql_03_0026__li103961052112310"><span>On the displayed page, confirm the specifications.</span><p><ul id="nosql_03_0026__ul15396552132312"><li id="nosql_03_0026__li839615216237">If you need to modify your settings, click <strong id="nosql_03_0026__b1936610306501">Previous</strong> to go back to the page where you specify details.</li><li id="nosql_03_0026__li5396105220234">If you do not need to modify your settings, click <strong id="nosql_03_0026__b122490402500">Submit</strong>.</li></ul>
</p></li><li id="nosql_03_0026__li1839755210230"><span>View the DB instance class change result.</span><p><p id="nosql_03_0026__p871435315404">Go to the <strong id="nosql_03_0026__b14701925182510">Basic Information</strong> page and in the <strong id="nosql_03_0026__b1071172532519">Specifications</strong> area you can see the new specifications.</p>
</p></li></ol>
</div>
<div class="section" id="nosql_03_0026__section175628543196"><h4 class="sectiontitle">Method 2</h4><ol id="nosql_03_0026__ol1574795881912"><li id="nosql_03_0026__li1434816932014"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_03_0026__li166191113205"><span>On the <strong id="nosql_03_0026__b7983173812121">Instance Management</strong> page, locate the instance you want to change the class for and choose <span class="menucascade" id="nosql_03_0026__menucascade177267457205"><b><span class="uicontrol" id="nosql_03_0026__uicontrol1672615455208">More</span></b> &gt; <b><span class="uicontrol" id="nosql_03_0026__uicontrol18670114932014">Change Instance Class</span></b></span> in the <strong id="nosql_03_0026__b17514182218">Operation</strong> column.</span></li><li id="nosql_03_0026__li0863136162316"><span>On the displayed page, select the desired vCPUs and memory and click <strong id="nosql_03_0026__en-us_topic_0000001092506824_b54778538206">Next</strong>.</span></li><li id="nosql_03_0026__li1086313662316"><span>On the displayed page, confirm the instance class.</span><p><ul id="nosql_03_0026__en-us_topic_0000001092506824_ul15396552132312"><li id="nosql_03_0026__en-us_topic_0000001092506824_li839615216237">If you need to modify your settings, click <strong id="nosql_03_0026__en-us_topic_0000001092506824_b1936610306501">Previous</strong> to go back to the page where you specify details.</li><li id="nosql_03_0026__en-us_topic_0000001092506824_li5396105220234">If you do not need to modify your settings, click <strong id="nosql_03_0026__en-us_topic_0000001092506824_b122490402500">Submit</strong> to change the instance class.</li></ul>
</p></li><li id="nosql_03_0026__li286315614239"><span>View the DB instance class change result.</span><p><p id="nosql_03_0026__en-us_topic_0000001092506824_p871435315404">Go to the <strong id="nosql_03_0026__en-us_topic_0000001092506824_b155661414183910">Basic Information</strong> page and in the <strong id="nosql_03_0026__en-us_topic_0000001092506824_b15567171415398">DB Information</strong> area you can see the new instance class.</p>
<div class="section" id="nosql_03_0026__section175628543196"><h4 class="sectiontitle">Method 2</h4><ol id="nosql_03_0026__ol1574795881912"><li id="nosql_03_0026__li1434816932014"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0026__li166191113205"><span>On the <strong id="nosql_03_0026__b7794105175618">Instances</strong> page, locate the instance whose specifications you want to change and choose <strong id="nosql_03_0026__b879465115611">Change Specifications</strong> in the <strong id="nosql_03_0026__b879435165616">Operation</strong> column.</span></li><li id="nosql_03_0026__li0863136162316"><span>On the displayed page, select the desired vCPUs and memory and click <strong id="nosql_03_0026__b1211983691313">Next</strong>.</span></li><li id="nosql_03_0026__li1086313662316"><span>On the displayed page, confirm the specifications.</span><p><ul id="nosql_03_0026__en-us_topic_0000001092506824_ul15396552132312"><li id="nosql_03_0026__en-us_topic_0000001092506824_li839615216237">If you need to modify your settings, click <strong id="nosql_03_0026__b71044185">Previous</strong> to go back to the page where you specify details.</li><li id="nosql_03_0026__en-us_topic_0000001092506824_li5396105220234">If you do not need to modify your settings, click <strong id="nosql_03_0026__b1087608737">Submit</strong>.</li></ul>
</p></li><li id="nosql_03_0026__li286315614239"><span>View the DB instance class change result.</span><p><p id="nosql_03_0026__en-us_topic_0000001092506824_p871435315404">Go to the <strong id="nosql_03_0026__b2594155910258">Basic Information</strong> page and in the <strong id="nosql_03_0026__b659565922515">Specifications</strong> area you can see the new specifications.</p>
</p></li></ol>
</div>
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<h1 class="topictitle1">Slow Query Logs</h1>
<div id="body1582772844002"><div class="section" id="nosql_03_0028__section204641425278"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_03_0028__p13875441232"><span id="nosql_03_0028__text82211533111714">GeminiDB</span> allows you to view slow query logs of databases. The unit of the execution time is ms. With slow query logs, you can identify and optimize slowly executed statements.</p>
</div>
<div class="section" id="nosql_03_0028__section5651101513599"><h4 class="sectiontitle">Viewing Log Details</h4><ol id="nosql_03_0028__o98d414cf5ae4498b8d529464cefe6496"><li id="nosql_03_0028__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_03_0028__li1812551193720"><span>On the <strong id="nosql_03_0028__b2050215505413">Instance Management</strong> page, click the target DB instance.</span></li><li id="nosql_03_0028__li029125953519"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_03_0028__uicontrol1556175310413"><b>Slow Query Logs</b></span>.</span></li><li id="nosql_03_0028__l6a3f6334c2484524beb87828d465befa"><span>On the <strong id="nosql_03_0028__b38308569410">Slow Query Logs</strong> page, set search criteria and click <strong id="nosql_03_0028__b118328565417">Search</strong> to view log information.</span><p><ul id="nosql_03_0028__ul23261698104647"><li id="nosql_03_0028__li735054117612">If you select <strong id="nosql_03_0028__b842352706112836">All nodes</strong>, the slow query logs of all nodes in the DB instance are displayed.</li><li id="nosql_03_0028__li3097579594147">Slow query logs of a node in different time periods</li><li id="nosql_03_0028__li8028690104647">Slow query statements of the following level
<div class="section" id="nosql_03_0028__section5651101513599"><h4 class="sectiontitle">Viewing Log Details</h4><ol id="nosql_03_0028__o98d414cf5ae4498b8d529464cefe6496"><li id="nosql_03_0028__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0028__li1812551193720"><span>On the <strong id="nosql_03_0028__b2050215505413">Instance Management</strong> page, click the target DB instance.</span></li><li id="nosql_03_0028__li029125953519"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_03_0028__uicontrol1556175310413"><b>Slow Query Logs</b></span>.</span></li><li id="nosql_03_0028__l6a3f6334c2484524beb87828d465befa"><span>On the <strong id="nosql_03_0028__b38308569410">Slow Query Logs</strong> page, set search criteria and click <strong id="nosql_03_0028__b118328565417">Search</strong> to view log information.</span><p><ul id="nosql_03_0028__ul23261698104647"><li id="nosql_03_0028__li735054117612">If you select <strong id="nosql_03_0028__b842352706112836">All nodes</strong>, the slow query logs of all nodes in the DB instance are displayed.</li><li id="nosql_03_0028__li3097579594147">Slow query logs of a node in different time periods</li><li id="nosql_03_0028__li8028690104647">Slow query statements of the following level
</li></ul>
</p></li></ol>
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<h1 class="topictitle1">Creating a Parameter Template</h1>
<div id="body1584949717219"><p id="nosql_05_0002__p25321333927">You can use database parameter templates to manage the DB engine configuration. A database parameter template acts as a container for engine configuration values that can be applied to one or more DB instances.</p>
<p id="nosql_05_0002__p65311641123117">Each user can create up to 100 parameter templates. All types of instances in the same project can share the quota.</p>
<div class="section" id="nosql_05_0002__section16814646152113"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0002__ol14664201542214"><li id="nosql_05_0002__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0002__li5959147152210"><span>In the navigation pane on the left, choose <span class="uicontrol" id="nosql_05_0002__uicontrol692313391376"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0002__li15234163732413"><span>On the <span class="uicontrol" id="nosql_05_0002__uicontrol19838103915375"><b>Parameter Template Management</b></span> page, click <strong id="nosql_05_0002__b23264153819">Create Parameter Template</strong>.</span></li><li id="nosql_05_0002__li53798526255"><span>Select a compatible DB engine version, name the parameter group, add the parameter group description, and click <strong id="nosql_05_0002__b311391993817">OK</strong> to create a parameter group template.</span><p><ul id="nosql_05_0002__ul970813973216"><li id="nosql_05_0002__li470817911322"><strong id="nosql_05_0002__b39038715351">Compatible API</strong>: Select the API type that is compatible with your DB engine parameter template.</li><li id="nosql_05_0002__li8631135633418"><strong id="nosql_05_0002__b480110452415">DB Engine Version</strong>: Select a DB engine version, for example, 3.11.</li><li id="nosql_05_0002__li0853373612"><strong id="nosql_05_0002__b3424163424315">Parameter Template Name</strong>: The template name must consist of 1 to 64 characters. It can contain only uppercase letters, lowercase letters, digits, hyphens (-), underscores (_), and periods (.).</li><li id="nosql_05_0002__li1224181983712"><strong id="nosql_05_0002__b18397161112448">Description</strong>: The description can contain a maximum of 256 characters except the carriage return character and the following special characters: &gt; ! &lt; " &amp; ' =</li></ul>
<div class="section" id="nosql_05_0002__section16814646152113"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0002__ol14664201542214"><li id="nosql_05_0002__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0002__li5959147152210"><span>In the navigation pane on the left, choose <span class="uicontrol" id="nosql_05_0002__uicontrol692313391376"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0002__li15234163732413"><span>On the <span class="uicontrol" id="nosql_05_0002__uicontrol19838103915375"><b>Parameter Template Management</b></span> page, click <strong id="nosql_05_0002__b23264153819">Create Parameter Template</strong>.</span></li><li id="nosql_05_0002__li53798526255"><span>Select a compatible DB engine version, name the parameter group, add the parameter group description, and click <strong id="nosql_05_0002__b311391993817">OK</strong> to create a parameter group template.</span><p><ul id="nosql_05_0002__ul970813973216"><li id="nosql_05_0002__li470817911322"><strong id="nosql_05_0002__b39038715351">Compatible API</strong>: Select the API type that is compatible with your DB engine parameter template.</li><li id="nosql_05_0002__li8631135633418"><strong id="nosql_05_0002__b480110452415">DB Engine Version</strong>: Select a DB engine version, for example, 3.11.</li><li id="nosql_05_0002__li0853373612"><strong id="nosql_05_0002__b3424163424315">Parameter Template Name</strong>: The template name must consist of 1 to 64 characters. It can contain only uppercase letters, lowercase letters, digits, hyphens (-), underscores (_), and periods (.).</li><li id="nosql_05_0002__li1224181983712"><strong id="nosql_05_0002__b18397161112448">Description</strong>: The description can contain a maximum of 256 characters except the carriage return character and the following special characters: &gt; ! &lt; " &amp; ' =</li></ul>
</p></li><li id="nosql_05_0002__li678783620383"><span>On the <strong id="nosql_05_0002__b114611777512">Parameter Template Management</strong> page, view the created parameter template.</span></li></ol>
</div>
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<h1 class="topictitle1">Exporting a Parameter Template</h1>
<div id="body1585011813260"><div class="section" id="nosql_05_0004__section642016144112"><h4 class="sectiontitle">Scenarios</h4><ul id="nosql_05_0004__ul13753132517462"><li id="nosql_05_0004__li2753125164611">You can export a parameter template of a DB instance for future use. To learn how to apply the exported parameter template to a DB instance, refer to section <a href="nosql_05_0008.html">Applying a Parameter Template</a>.</li><li id="nosql_05_0004__li20633182716532">You can export the parameter template details (parameter names, values, and descriptions) of a DB instance to a CSV file for review and analysis.</li></ul>
</div>
<div class="section" id="nosql_05_0004__section1712692313466"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0004__ol1134817278468"><li id="nosql_05_0004__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0004__li1954415481460"><span>In the navigation pane on the left, choose <strong id="nosql_05_0004__b1663717119555">Instance Management</strong>. On the displayed page, click the target DB instance.</span></li><li id="nosql_05_0004__li43971846184716"><span>In the navigation pane on the left, choose <strong id="nosql_05_0004__b1783332075212">Parameters</strong>. On the <strong id="nosql_05_0004__b10139136105213">Parameters</strong> tab, above the parameter list, click <strong id="nosql_05_0004__b1883517209522">Export</strong>.</span><p><ul id="nosql_05_0004__ul51291547164713"><li id="nosql_05_0004__li212984774713"><strong id="nosql_05_0004__b117413231551">Parameter Template</strong>: You can export the parameters of the DB instance to a template for future use.<div class="p" id="nosql_05_0004__p12800815101814">In the displayed dialog box, configure required details and click <strong id="nosql_05_0004__b836822913316">OK</strong>.<div class="note" id="nosql_05_0004__note19144122131619"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="nosql_05_0004__ul51563012160"><li id="nosql_05_0004__li1986254194916">The template name can be up to 64 characters long. It can contain only uppercase letters, lowercase letters, numbers, hyphens (-), underscores (_), and periods (.).</li><li id="nosql_05_0004__li181563051612">The template description consists of a maximum of 256 characters and cannot include line breaks or the following special characters: &gt;!&lt;"&amp;'=</li></ul>
<div class="section" id="nosql_05_0004__section1712692313466"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0004__ol1134817278468"><li id="nosql_05_0004__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0004__li1954415481460"><span>In the navigation pane on the left, choose <strong id="nosql_05_0004__b1663717119555">Instance Management</strong>. On the displayed page, click the target DB instance.</span></li><li id="nosql_05_0004__li43971846184716"><span>In the navigation pane on the left, choose <strong id="nosql_05_0004__b1783332075212">Parameters</strong>. On the <strong id="nosql_05_0004__b10139136105213">Parameters</strong> tab, above the parameter list, click <strong id="nosql_05_0004__b1883517209522">Export</strong>.</span><p><ul id="nosql_05_0004__ul51291547164713"><li id="nosql_05_0004__li212984774713"><strong id="nosql_05_0004__b117413231551">Parameter Template</strong>: You can export the parameters of the DB instance to a template for future use.<div class="p" id="nosql_05_0004__p12800815101814">In the displayed dialog box, configure required details and click <strong id="nosql_05_0004__b836822913316">OK</strong>.<div class="note" id="nosql_05_0004__note19144122131619"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="nosql_05_0004__ul51563012160"><li id="nosql_05_0004__li1986254194916">The template name can be up to 64 characters long. It can contain only uppercase letters, lowercase letters, numbers, hyphens (-), underscores (_), and periods (.).</li><li id="nosql_05_0004__li181563051612">The template description consists of a maximum of 256 characters and cannot include line breaks or the following special characters: &gt;!&lt;"&amp;'=</li></ul>
</div></div>
</div>
<p id="nosql_05_0004__p118631145492">After the parameter template is exported, a new template is generated in the list on the <strong id="nosql_05_0004__b1575061717329">Parameter Template Management</strong> page.</p>

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<h1 class="topictitle1">Comparing Parameter Templates</h1>
<div id="body1584949717219"><div class="section" id="nosql_05_0005__section82771128112912"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_05_0005__p1745913346296">This section guides you on how to compare two parameter templates of the same node type and DB engine version to know their current settings.</p>
</div>
<div class="section" id="nosql_05_0005__section181011280312"><h4 class="sectiontitle">Comparing Parameter Templates</h4><ol id="nosql_05_0005__ol14519641173114"><li id="nosql_05_0005__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0005__li570312125322"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0005__uicontrol2680203173612"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0005__li5604114763216"><span>In the parameter template list, locate the parameter template that you created and click <strong id="nosql_05_0005__b13615136173910">Compare</strong> in the <strong id="nosql_05_0005__b8359210123913">Operation</strong> column.</span></li><li id="nosql_05_0005__li94758437353"><span>In the displayed dialog box, select a parameter template that shares the same DB engine with the template 1 and click <strong id="nosql_05_0005__b21351741124112">OK</strong>.</span><p><ul id="nosql_05_0005__ul151732033174017"><li id="nosql_05_0005__li383819391409">If their settings are different, the parameter names and values of both parameter templates are displayed.</li><li id="nosql_05_0005__li10173163316406">If their settings are the same, no data is displayed.</li></ul>
<div class="section" id="nosql_05_0005__section181011280312"><h4 class="sectiontitle">Comparing Parameter Templates</h4><ol id="nosql_05_0005__ol14519641173114"><li id="nosql_05_0005__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0005__li570312125322"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0005__uicontrol2680203173612"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0005__li5604114763216"><span>In the parameter template list, locate the parameter template that you created and click <strong id="nosql_05_0005__b13615136173910">Compare</strong> in the <strong id="nosql_05_0005__b8359210123913">Operation</strong> column.</span></li><li id="nosql_05_0005__li94758437353"><span>In the displayed dialog box, select a parameter template that shares the same DB engine with the template 1 and click <strong id="nosql_05_0005__b21351741124112">OK</strong>.</span><p><ul id="nosql_05_0005__ul151732033174017"><li id="nosql_05_0005__li383819391409">If their settings are different, the parameter names and values of both parameter templates are displayed.</li><li id="nosql_05_0005__li10173163316406">If their settings are the same, no data is displayed.</li></ul>
</p></li></ol>
</div>
<div class="section" id="nosql_05_0005__section211344397"><h4 class="sectiontitle">Comparing Parameter Templates of a Specified Instance</h4><ol id="nosql_05_0005__ol1946008141014"><li id="nosql_05_0005__li742232814415"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0005__li159697269106"><span>In the navigation pane on the left, choose <span class="uicontrol" id="nosql_05_0005__uicontrol12788175894918"><b>Instance Management</b></span>.</span></li><li id="nosql_05_0005__li01021859191014"><span>On the <strong id="nosql_05_0005__b1940611013501">Instance Management</strong> page, click the target DB instance.</span></li><li id="nosql_05_0005__li207637851220"><span>In the navigation pane on the left, choose <strong id="nosql_05_0005__b102251619115011">Parameters</strong>. On the <strong id="nosql_05_0005__b58428435317">Parameters</strong> tab, click <span class="uicontrol" id="nosql_05_0005__uicontrol172261719115017"><b><span class="keyword" id="nosql_05_0005__keyword62251719115013">Compare</span></b></span> above the parameter list.</span></li><li id="nosql_05_0005__li2417165319308"><span>In the displayed dialog box, select a parameter template to be compared and click <strong id="nosql_05_0005__b76221541195015">OK</strong>.</span><p><ul id="nosql_05_0005__ul3518932163717"><li id="nosql_05_0005__li95181632103718">If their settings are different, the parameter names and values of both parameter templates are displayed.</li><li id="nosql_05_0005__li1251817328371">If their settings are the same, no data is displayed.</li></ul>
<div class="section" id="nosql_05_0005__section211344397"><h4 class="sectiontitle">Comparing Parameter Templates of a Specified Instance</h4><ol id="nosql_05_0005__ol1946008141014"><li id="nosql_05_0005__li742232814415"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0005__li159697269106"><span>In the navigation pane on the left, choose <span class="uicontrol" id="nosql_05_0005__uicontrol12788175894918"><b>Instance Management</b></span>.</span></li><li id="nosql_05_0005__li01021859191014"><span>On the <strong id="nosql_05_0005__b1940611013501">Instance Management</strong> page, click the target DB instance.</span></li><li id="nosql_05_0005__li207637851220"><span>In the navigation pane on the left, choose <strong id="nosql_05_0005__b102251619115011">Parameters</strong>. On the <strong id="nosql_05_0005__b58428435317">Parameters</strong> tab, click <span class="uicontrol" id="nosql_05_0005__uicontrol172261719115017"><b><span class="keyword" id="nosql_05_0005__keyword62251719115013">Compare</span></b></span> above the parameter list.</span></li><li id="nosql_05_0005__li2417165319308"><span>In the displayed dialog box, select a parameter template to be compared and click <strong id="nosql_05_0005__b76221541195015">OK</strong>.</span><p><ul id="nosql_05_0005__ul3518932163717"><li id="nosql_05_0005__li95181632103718">If their settings are different, the parameter names and values of both parameter templates are displayed.</li><li id="nosql_05_0005__li1251817328371">If their settings are the same, no data is displayed.</li></ul>
</p></li></ol>
</div>
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<div id="body1584949717219"><div class="section" id="nosql_05_0006__section16535121717424"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_05_0006__p841972484216">You can replicate a parameter template you have created. When you have already created a parameter template and want to include most of the custom parameters and values from that template in a new parameter template, you can replicate that parameter template. You can also export the parameter template to generate a new parameter template for future use.</p>
<p id="nosql_05_0006__p841916249423">Default parameter templates cannot be replicated, but you can create parameter templates based on the default templates provided.</p>
</div>
<div class="section" id="nosql_05_0006__section13465202494718"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0006__ol182121930124716"><li id="nosql_05_0006__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0006__li63411716174911"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0006__uicontrol686734115314"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0006__li1370312380504"><span>On the <strong id="nosql_05_0006__b11876184412537">Parameter Template Management</strong> page, click the <strong id="nosql_05_0006__b1687664415316">Custom Templates</strong> tab. Locate the target parameter template and click <strong id="nosql_05_0006__b12878144185319">Replicate</strong> in the <strong id="nosql_05_0006__b087844416532">Operation</strong> column.</span><p><p id="nosql_05_0006__p83471258652">Alternatively, click the target DB instance on the <span class="uicontrol" id="nosql_05_0006__uicontrol16580102415553"><b>Instance Management</b></span> page. On the <span class="uicontrol" id="nosql_05_0006__uicontrol15816249556"><b>Parameters</b></span> page, click <span class="uicontrol" id="nosql_05_0006__uicontrol25828242557"><b>Export</b></span> to generate a new parameter template for future use.</p>
<div class="section" id="nosql_05_0006__section13465202494718"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0006__ol182121930124716"><li id="nosql_05_0006__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0006__li63411716174911"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0006__uicontrol686734115314"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0006__li1370312380504"><span>On the <strong id="nosql_05_0006__b11876184412537">Parameter Template Management</strong> page, click the <strong id="nosql_05_0006__b1687664415316">Custom Templates</strong> tab. Locate the target parameter template and click <strong id="nosql_05_0006__b12878144185319">Replicate</strong> in the <strong id="nosql_05_0006__b087844416532">Operation</strong> column.</span><p><p id="nosql_05_0006__p83471258652">Alternatively, click the target DB instance on the <span class="uicontrol" id="nosql_05_0006__uicontrol16580102415553"><b>Instance Management</b></span> page. On the <span class="uicontrol" id="nosql_05_0006__uicontrol15816249556"><b>Parameters</b></span> page, click <span class="uicontrol" id="nosql_05_0006__uicontrol25828242557"><b>Export</b></span> to generate a new parameter template for future use.</p>
</p></li><li id="nosql_05_0006__li16809153410541"><span>In the displayed dialog box, enter the parameter template name and description and click <strong id="nosql_05_0006__b124261441459">OK</strong>.</span><p><ul id="nosql_05_0006__ul18410132485810"><li id="nosql_05_0006__li197511438195816">The template name can be up to 64 characters long. It can contain only uppercase letters, lowercase letters, numbers, hyphens (-), underscores (_), and periods (.).</li><li id="nosql_05_0006__li154101241581">The description contains a maximum of 256 characters and cannot include line breaks or the following special characters: &gt;!&lt;"&amp;'=</li></ul>
<p id="nosql_05_0006__p1752437105919">After the parameter template is replicated, a new template is generated in the list on the <strong id="nosql_05_0006__b1565861811720">Parameter Template Management</strong> page.</p>
</p></li></ol>

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<h1 class="topictitle1">Resetting a Parameter Template</h1>
<div id="body1584949717220"><div class="section" id="nosql_05_0007__section47524321189"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_05_0007__p8060118">You can reset all parameters in a custom parameter template to their default settings.</p>
</div>
<div class="section" id="nosql_05_0007__section98479539814"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0007__ol2033625819819"><li id="nosql_05_0007__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0007__li63411716174911"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0007__uicontrol5831155411811"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0007__li1370312380504"><span>On the <strong id="nosql_05_0007__b12721257882">Parameter Template Management</strong> page, click the <strong id="nosql_05_0007__b873357289">Custom Templates</strong> tab. Locate the target parameter template and choose <strong id="nosql_05_0007__b373185714816">More</strong> &gt; <strong id="nosql_05_0007__b137411571815">Reset</strong> in the <strong id="nosql_05_0007__b11748571585">Operation</strong> column.</span></li><li id="nosql_05_0007__li154522279111"><span>Click <strong id="nosql_05_0007__b16837337297">Yes</strong> to reset the parameter template.</span></li></ol>
<div class="section" id="nosql_05_0007__section98479539814"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0007__ol2033625819819"><li id="nosql_05_0007__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0007__li63411716174911"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0007__uicontrol5831155411811"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0007__li1370312380504"><span>On the <strong id="nosql_05_0007__b12721257882">Parameter Template Management</strong> page, click the <strong id="nosql_05_0007__b873357289">Custom Templates</strong> tab. Locate the target parameter template and choose <strong id="nosql_05_0007__b373185714816">More</strong> &gt; <strong id="nosql_05_0007__b137411571815">Reset</strong> in the <strong id="nosql_05_0007__b11748571585">Operation</strong> column.</span></li><li id="nosql_05_0007__li154522279111"><span>Click <strong id="nosql_05_0007__b16837337297">Yes</strong> to reset the parameter template.</span></li></ol>
</div>
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<h1 class="topictitle1">Applying a Parameter Template</h1>
<div id="body1584951676008"><div class="section" id="nosql_05_0008__section732387614651"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_05_0008__p1638354818120">Modifications to parameters in a custom parameter template take effect for DB instances only after you have applied the template to the target DB instances.</p>
</div>
<div class="section" id="nosql_05_0008__section1744134714226"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0008__ol620811481283"><li id="nosql_05_0008__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0008__li63411716174911"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0008__uicontrol1499185213108"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0008__li7437257810"><span>On the <strong id="nosql_05_0008__b12310165441012">Parameter Template Management</strong> page, apply a default template or a custom template to a target DB instance:</span><p><ul id="nosql_05_0008__ul517212618815"><li id="nosql_05_0008__li1617220268811">To apply a default template, click <strong id="nosql_05_0008__b124613061115">Default Templates</strong>, locate the target parameter template, and in the <strong id="nosql_05_0008__b54641207119">Operation</strong> column, click <strong id="nosql_05_0008__b2463140121115">Apply</strong>.</li><li id="nosql_05_0008__li15759194611512">To apply a custom template, click <strong id="nosql_05_0008__b7867143217156">Custom Templates</strong>, locate the target parameter template, and in the <strong id="nosql_05_0008__b118701032161520">Operation</strong> column, choose <strong id="nosql_05_0008__b12868123221517">More</strong> &gt; <strong id="nosql_05_0008__b886863251515">Apply</strong>.</li></ul>
<div class="section" id="nosql_05_0008__section1744134714226"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0008__ol620811481283"><li id="nosql_05_0008__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0008__li63411716174911"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0008__uicontrol1499185213108"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0008__li7437257810"><span>On the <strong id="nosql_05_0008__b845491715234">Parameter Templates</strong> page, perform the following operations based on the template type:</span><p><ul id="nosql_05_0008__ul517212618815"><li id="nosql_05_0008__li1617220268811">To apply a default template, click <strong id="nosql_05_0008__b124613061115">Default Templates</strong>, locate the target parameter template, and in the <strong id="nosql_05_0008__b54641207119">Operation</strong> column, click <strong id="nosql_05_0008__b2463140121115">Apply</strong>.</li><li id="nosql_05_0008__li15759194611512">To apply a custom template, click <strong id="nosql_05_0008__b7867143217156">Custom Templates</strong>, locate the target parameter template, and in the <strong id="nosql_05_0008__b118701032161520">Operation</strong> column, choose <strong id="nosql_05_0008__b12868123221517">More</strong> &gt; <strong id="nosql_05_0008__b886863251515">Apply</strong>.</li></ul>
<p id="nosql_05_0008__p3571105014158">A parameter template can be applied to one or more DB instances.</p>
</p></li><li id="nosql_05_0008__li12762120163118"><span>In the displayed dialog box, select one or more DB instances to which the parameter template will be applied and click <strong id="nosql_05_0008__b744694512153">OK</strong>.</span><p><p id="nosql_05_0008__p9763620183116">After a parameter template is applied, you can <a href="nosql_05_0009.html">view its application records</a>.</p>
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<h1 class="topictitle1">Viewing Application Records of a Parameter Template</h1>
<div id="body1584951676008"><div class="section" id="nosql_05_0009__section25231510123010"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_05_0009__p8060118">You can view the application records of a parameter template.</p>
</div>
<div class="section" id="nosql_05_0009__section16531305302"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0009__ol088414517300"><li id="nosql_05_0009__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0009__li25222157315"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0009__uicontrol174801357111620"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0009__li18517104863112"><span>On the <strong id="nosql_05_0009__b16313191861716">Parameter Template Management</strong> page, locate the target parameter template and choose <strong id="nosql_05_0009__b1185243451819">More</strong> &gt; <strong id="nosql_05_0009__b29221715181">View Application Record</strong> in the <strong id="nosql_05_0009__b145121517184">Operation</strong> column.</span><p><p id="nosql_05_0009__p119971610183614">You can view the name or ID of the DB instance that the parameter template applies to, as well as the application status, application time, and the causes of any failures that have occurred.</p>
<div class="section" id="nosql_05_0009__section16531305302"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0009__ol088414517300"><li id="nosql_05_0009__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0009__li25222157315"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0009__uicontrol174801357111620"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0009__li18517104863112"><span>On the <strong id="nosql_05_0009__b16313191861716">Parameter Template Management</strong> page, locate the target parameter template and choose <strong id="nosql_05_0009__b1185243451819">More</strong> &gt; <strong id="nosql_05_0009__b29221715181">View Application Record</strong> in the <strong id="nosql_05_0009__b145121517184">Operation</strong> column.</span><p><p id="nosql_05_0009__p119971610183614">You can view the name or ID of the DB instance that the parameter template applies to, as well as the application status, application time, and the causes of any failures that have occurred.</p>
</p></li></ol>
</div>
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<h1 class="topictitle1">Modifying a Parameter Template Description</h1>
<div id="body1584951676008"><div class="section" id="nosql_05_0010__section369901034110"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_05_0010__p971711159411">You can modify the description of a custom parameter template if needed.</p>
</div>
<div class="section" id="nosql_05_0010__section1283864710443"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0010__ol1584565804414"><li id="nosql_05_0010__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0010__li12990151324515"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0010__uicontrol2089417202202"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0010__li19796105094517"><span>On the <strong id="nosql_05_0010__b6330152342011">Parameter Template Management</strong> page, click the <strong id="nosql_05_0010__b113301223162014">Custom Templates</strong> tab. Locate the target parameter template and click <span><img id="nosql_05_0010__image136131762317" src="en-us_image_0000001815204972.png"></span> in the <strong id="nosql_05_0010__b15331172332017">Description</strong> column.</span></li><li id="nosql_05_0010__li2674321182123"><span>Enter a new description. You can click <span><img id="nosql_05_0010__image115301558125419" src="en-us_image_0000001861924833.png"></span> to submit or <span><img id="nosql_05_0010__image10833150185313" src="en-us_image_0000001815204976.png"></span> to cancel the modification.</span><p><ul id="nosql_05_0010__ul16137151182143"><li id="nosql_05_0010__li44455486182143">After you submit the modification, you can view the new description in the <strong id="nosql_05_0010__b1973265592016">Description</strong> column on the <strong id="nosql_05_0010__b173219552206">Parameter Template Management</strong> page.</li><li id="nosql_05_0010__li29196881182143">The description can include up to 256 characters but cannot contain the following special characters: &gt;!&lt;"&amp;'=</li></ul>
<div class="section" id="nosql_05_0010__section1283864710443"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0010__ol1584565804414"><li id="nosql_05_0010__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0010__li12990151324515"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0010__uicontrol2089417202202"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0010__li19796105094517"><span>On the <strong id="nosql_05_0010__b6330152342011">Parameter Template Management</strong> page, click the <strong id="nosql_05_0010__b113301223162014">Custom Templates</strong> tab. Locate the target parameter template and click <span><img id="nosql_05_0010__image136131762317" src="en-us_image_0000001815204972.png"></span> in the <strong id="nosql_05_0010__b15331172332017">Description</strong> column.</span></li><li id="nosql_05_0010__li2674321182123"><span>Enter a new description. You can click <span><img id="nosql_05_0010__image115301558125419" src="en-us_image_0000001861924833.png"></span> to submit or <span><img id="nosql_05_0010__image10833150185313" src="en-us_image_0000001815204976.png"></span> to cancel the modification.</span><p><ul id="nosql_05_0010__ul16137151182143"><li id="nosql_05_0010__li44455486182143">After you submit the modification, you can view the new description in the <strong id="nosql_05_0010__b1973265592016">Description</strong> column on the <strong id="nosql_05_0010__b173219552206">Parameter Template Management</strong> page.</li><li id="nosql_05_0010__li29196881182143">The description can include up to 256 characters but cannot contain the following special characters: &gt;!&lt;"&amp;'=</li></ul>
</p></li></ol>
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<div class="notice" id="nosql_05_0011__note5116671563"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><ul id="nosql_05_0011__ul57531123562"><li id="nosql_05_0011__li197531012135620">Deleted templates cannot be recovered, so exercise caution when performing this operation.</li><li id="nosql_05_0011__li9501041185613">Default parameter templates cannot be deleted.</li></ul>
</div></div>
</div>
<div class="section" id="nosql_05_0011__section557072518579"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0011__ol48021229195718"><li id="nosql_05_0011__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0011__li18236135017572"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0011__uicontrol3791315237"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0011__li46022307587"><span>On the <strong id="nosql_05_0011__b469262182317">Parameter Template Management</strong> page, click <strong id="nosql_05_0011__b669322152313">Custom Templates</strong>. Locate the parameter template you wish to delete and choose <strong id="nosql_05_0011__b11694202152312">More</strong> &gt; <strong id="nosql_05_0011__b13694172142320">Delete</strong> in the <strong id="nosql_05_0011__b1269462152311">Operation</strong> column.</span></li><li id="nosql_05_0011__li137371197015"><span>Click <strong id="nosql_05_0011__b2557182412318">Yes</strong> to delete the parameter template.</span></li></ol>
<div class="section" id="nosql_05_0011__section557072518579"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_05_0011__ol48021229195718"><li id="nosql_05_0011__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0011__li18236135017572"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_05_0011__uicontrol3791315237"><b>Parameter Template Management</b></span>.</span></li><li id="nosql_05_0011__li46022307587"><span>On the <strong id="nosql_05_0011__b15574133072418">Parameter Templates</strong> page, click <strong id="nosql_05_0011__b8575830122419">Custom Templates</strong>. Locate the parameter template you want to delete and choose <strong id="nosql_05_0011__b1657633019242">More</strong> &gt; <strong id="nosql_05_0011__b19576430132419">Delete</strong> in the <strong id="nosql_05_0011__b1957610303243">Operation</strong> column.</span></li><li id="nosql_05_0011__li137371197015"><span>Click <strong id="nosql_05_0011__b2557182412318">Yes</strong> to delete the parameter template.</span></li></ol>
</div>
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<div class="note" id="nosql_05_0012__note108081159426"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="nosql_05_0012__p188089591723">In a newly exported or created parameter template, change history is left blank.</p>
</div></div>
</div>
<div class="section" id="nosql_05_0012__section159148531034"><h4 class="sectiontitle">Viewing Change History of a Custom Parameter Template</h4><ol id="nosql_05_0012__ol01321299417"><li id="nosql_05_0012__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0012__li35081232123443"><span>In the navigation pane on the left, choose <span class="uicontrol" id="nosql_05_0012__uicontrol583911415110"><b>Parameter Template Management</b></span>. On the <span class="uicontrol" id="nosql_05_0012__uicontrol38421241181119"><b>Custom Templates</b></span> page, click the parameter template you wish to view.</span></li><li id="nosql_05_0012__li25101895123443"><span>In the navigation pane on the left, choose <strong id="nosql_05_0012__b3513164531118">Change History</strong>. Then, view the parameter name, original parameter value, new parameter value, modification status, and modification time.</span><p><p id="nosql_05_0012__p973580193617">You can apply the parameter template to DB instances as required by referring to section <a href="nosql_05_0008.html">Applying a Parameter Template</a>.</p>
<div class="section" id="nosql_05_0012__section159148531034"><h4 class="sectiontitle">Viewing Change History of a Custom Parameter Template</h4><ol id="nosql_05_0012__ol01321299417"><li id="nosql_05_0012__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0012__li35081232123443"><span>In the navigation pane on the left, choose <span class="uicontrol" id="nosql_05_0012__uicontrol583911415110"><b>Parameter Template Management</b></span>. On the <span class="uicontrol" id="nosql_05_0012__uicontrol38421241181119"><b>Custom Templates</b></span> page, click the parameter template you wish to view.</span></li><li id="nosql_05_0012__li25101895123443"><span>In the navigation pane on the left, choose <strong id="nosql_05_0012__b3513164531118">Change History</strong>. Then, view the parameter name, original parameter value, new parameter value, modification status, and modification time.</span><p><p id="nosql_05_0012__p973580193617">You can apply the parameter template to DB instances as required by referring to section <a href="nosql_05_0008.html">Applying a Parameter Template</a>.</p>
</p></li></ol>
</div>
<div class="section" id="nosql_05_0012__section165497440335"><h4 class="sectiontitle">Viewing Change History of DB Instance Parameters</h4><ol id="nosql_05_0012__ol1870111403415"><li id="nosql_05_0012__li1967337444"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_05_0012__li38701014133413"><span>On the <strong id="nosql_05_0012__b14954113915127">Instance Management</strong> page, click the target DB instance. The <strong id="nosql_05_0012__b15955839151210">Basic Information</strong> page is displayed.</span></li><li id="nosql_05_0012__li3870111410344"><span>In the navigation pane on the left, click <strong id="nosql_05_0012__b167203475120">Parameters</strong>. On the <strong id="nosql_05_0012__b167211347131214">Change History</strong> tab, view the parameter name, original parameter value, new parameter value, modification status, and modification time.</span></li></ol>
<div class="section" id="nosql_05_0012__section165497440335"><h4 class="sectiontitle">Viewing Change History of DB Instance Parameters</h4><ol id="nosql_05_0012__ol1870111403415"><li id="nosql_05_0012__li1967337444"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_05_0012__li38701014133413"><span>On the <strong id="nosql_05_0012__b14954113915127">Instance Management</strong> page, click the target DB instance. The <strong id="nosql_05_0012__b15955839151210">Basic Information</strong> page is displayed.</span></li><li id="nosql_05_0012__li3870111410344"><span>In the navigation pane on the left, click <strong id="nosql_05_0012__b167203475120">Parameters</strong>. On the <strong id="nosql_05_0012__b167211347131214">Change History</strong> tab, view the parameter name, original parameter value, new parameter value, modification status, and modification time.</span></li></ol>
</div>
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</div>
<div class="section" id="nosql_increase_nodes__section1913115261611"><h4 class="sectiontitle">Precautions</h4><ul id="nosql_increase_nodes__ul1380612581514"><li id="nosql_increase_nodes__li7531105624410">Adding nodes may lead to the decrease of operations per second (OPS). You are advised to perform this operation during off-peak hours.</li><li id="nosql_increase_nodes__li1980613581556">You can only add nodes when the instance status is <strong id="nosql_increase_nodes__b842352706195638">Available</strong> or <strong id="nosql_increase_nodes__b842352706195634">Checking restoration</strong>.</li><li id="nosql_increase_nodes__li19806145813518">A DB instance cannot be deleted when one or more nodes are being added.</li></ul>
</div>
<div class="section" id="nosql_increase_nodes__section79281543052"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_increase_nodes__ol1470917142592"><li id="nosql_increase_nodes__li1374519431356"><span><a href="nosql_login.html">Log in to the GaussDB NoSQL console.</a></span></li><li id="nosql_increase_nodes__li1871461413595"><span>On the <strong id="nosql_increase_nodes__b2942955151212">Instance Management</strong> page, click the DB instance you wish to add nodes for.</span></li><li id="nosql_increase_nodes__li19716514155911"><span>In the <strong id="nosql_increase_nodes__b128891314152614">Node Information</strong> area on the <strong id="nosql_increase_nodes__b1929121918263">Basic Information</strong> page, click <strong id="nosql_increase_nodes__b292922418262">Add Node</strong>.</span></li><li id="nosql_increase_nodes__li17718141416595"><span>Specify <strong id="nosql_increase_nodes__b841741431810">Add Nodes</strong> and click <strong id="nosql_increase_nodes__b1541816149186">Next</strong>.</span><p><ul id="nosql_increase_nodes__ul1596210408423"><li id="nosql_increase_nodes__li12963240164218">By default, the specifications of new nodes are the same as the DB instance and cannot be modified.</li><li id="nosql_increase_nodes__li69631440154212">Up to 200 nodes can be added to a <span id="nosql_increase_nodes__text1125214311528">GeminiDB Cassandra</span> instance.</li></ul>
<div class="section" id="nosql_increase_nodes__section79281543052"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_increase_nodes__ol1470917142592"><li id="nosql_increase_nodes__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_increase_nodes__li1871461413595"><span>On the <strong id="nosql_increase_nodes__b199431139262">Instances</strong> page, locate the target instance and click its name.</span></li><li id="nosql_increase_nodes__li19716514155911"><span>In the <strong id="nosql_increase_nodes__b128891314152614">Node Information</strong> area on the <strong id="nosql_increase_nodes__b1929121918263">Basic Information</strong> page, click <strong id="nosql_increase_nodes__b292922418262">Add Node</strong>.</span></li><li id="nosql_increase_nodes__li17718141416595"><span>Specify <strong id="nosql_increase_nodes__b841741431810">Add Nodes</strong> and click <strong id="nosql_increase_nodes__b1541816149186">Next</strong>.</span><p><ul id="nosql_increase_nodes__ul1596210408423"><li id="nosql_increase_nodes__li12963240164218">By default, the specifications of new nodes are the same as the DB instance and cannot be modified.</li><li id="nosql_increase_nodes__li69631440154212">Up to 200 nodes can be added to a <span id="nosql_increase_nodes__text1125214311528">GeminiDB Cassandra</span> instance.</li></ul>
</p></li><li id="nosql_increase_nodes__li103961052112310"><span>On the displayed page, confirm the node configuration details.</span><p><ul id="nosql_increase_nodes__ul15396552132312"><li id="nosql_increase_nodes__li839615216237">If you need to modify your settings, click <strong id="nosql_increase_nodes__b13307004288">Previous</strong> to go back to the page where you specify details.</li><li id="nosql_increase_nodes__li5396105220234">If you do not need to modify your settings, click <strong id="nosql_increase_nodes__b29686233213">Submit</strong> to add the nodes.</li></ul>
</p></li><li id="nosql_increase_nodes__li6223205113329"><span>View the result of adding nodes.</span><p><ul id="nosql_increase_nodes__ul335824614332"><li id="nosql_increase_nodes__li51861851183311">The status of the DB instance in the instance list is <strong id="nosql_increase_nodes__b44099217153">Adding node</strong>.</li><li id="nosql_increase_nodes__li108743456544">After the nodes are added, the DB instance status becomes <strong id="nosql_increase_nodes__b186160220168">Available</strong>.</li><li id="nosql_increase_nodes__li45686665415">Click the DB instance name. In the <strong id="nosql_increase_nodes__b16711415101613">Node Information</strong> area on the <strong id="nosql_increase_nodes__b6390132061620">Basic Information</strong> page, view the information about the new nodes.</li></ul>
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<div class="section" id="nosql_increase_storage__section446061684012"><h4 class="sectiontitle">Precautions</h4><p id="nosql_increase_storage__p3116115884018">Storage space can only be scaled up. It cannot be scaled down.</p>
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<div class="section" id="nosql_increase_storage__section10794192521015"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_increase_storage__ol9213165010343"><li id="nosql_increase_storage__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_increase_storage__li1871461413595"><span>On the <strong id="nosql_increase_storage__b179133239211">Instance Management</strong> page, click the DB instance you wish to scale up.</span></li><li id="nosql_increase_storage__l3af6a9cc8c404c93b5c915fc46a3aaac"><span>In the <span class="uicontrol" id="nosql_increase_storage__uicontrol7505195410396"><b>Storage Space</b></span> area on the <span class="uicontrol" id="nosql_increase_storage__uicontrol25111154113911"><b>Basic Information</b></span> page, click <span class="uicontrol" id="nosql_increase_storage__uicontrol11512654113919"><b>Scale</b></span>.</span></li><li id="nosql_increase_storage__li1539374910265"><span>On the displayed page, specify the new storage capacity and click <strong id="nosql_increase_storage__b194431973117">Next</strong>.</span><p><p id="nosql_increase_storage__p3603382193548">Select at least 1 GB each time you scale up the storage, and the storage size must be an integer.</p>
<div class="section" id="nosql_increase_storage__section10794192521015"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_increase_storage__ol9213165010343"><li id="nosql_increase_storage__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_increase_storage__li1871461413595"><span>On the <strong id="nosql_increase_storage__b122991844182111">Instances</strong> page, click the target instance name.</span></li><li id="nosql_increase_storage__l3af6a9cc8c404c93b5c915fc46a3aaac"><span>In the <span class="uicontrol" id="nosql_increase_storage__uicontrol7505195410396"><b>Storage Space</b></span> area on the <span class="uicontrol" id="nosql_increase_storage__uicontrol25111154113911"><b>Basic Information</b></span> page, click <span class="uicontrol" id="nosql_increase_storage__uicontrol11512654113919"><b>Scale</b></span>.</span></li><li id="nosql_increase_storage__li1539374910265"><span>On the displayed page, specify the new storage capacity and click <strong id="nosql_increase_storage__b194431973117">Next</strong>.</span><p><p id="nosql_increase_storage__p3603382193548">Select at least 1 GB each time you scale up the storage, and the storage size must be an integer.</p>
</p></li><li id="nosql_increase_storage__li103961052112310"><span>On the displayed page, confirm the storage space.</span><p><ul id="nosql_increase_storage__ul15396552132312"><li id="nosql_increase_storage__li839615216237">If you need to modify your settings, click <strong id="nosql_increase_storage__b537584918183">Previous</strong> to go back to the page where you specify details.</li><li id="nosql_increase_storage__li5396105220234">If you do not need to modify your settings, click <strong id="nosql_increase_storage__b19147527185">Submit</strong> to scale up the storage space.</li></ul>
</p></li><li id="nosql_increase_storage__li61310971193548"><span>Check the scale-up result.</span><p><ul id="nosql_increase_storage__ul9567176185416"><li id="nosql_increase_storage__li756746165414">The status of the DB instance in the instance list is <strong id="nosql_increase_storage__b249715587505">Scaling up</strong>.</li><li id="nosql_increase_storage__li108743456544">After the scale up is completed, the DB instance status becomes <strong id="nosql_increase_storage__b123041137135211">Available</strong>.</li><li id="nosql_increase_storage__li45686665415">In the <strong id="nosql_increase_storage__b842352706194533">Storage Space</strong> area on the <strong id="nosql_increase_storage__b842352706194548">Basic Information</strong> page, check whether the scale up was successful. </li></ul>
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