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Reviewed-by: Székely, Ond <ond.szekely@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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<a name="nosql_01_0001"></a><a name="nosql_01_0001"></a>
<h1 class="topictitle1">System Architecture</h1>
<div id="body1526959698240"><p id="nosql_01_0001__p126281738924"><span id="nosql_01_0001__text1194109163013">GeminiDB</span> is a distributed database with decoupled compute and storage architecture. The compute clusters consist of multiple homogeneous nodes, and data is stored in a distributed, shared storage pool. Compute and storage resources are decoupled from each other so they can be flexibly scaled in or out without having to migrate any data.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_user_guide.html">Introduction</a></div>
</div>
</div>

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<a name="nosql_01_0002"></a><a name="nosql_01_0002"></a>
<h1 class="topictitle1">Highlights</h1>
<div id="body1526959698240"><div class="section" id="nosql_01_0002__section1882835910208"><h4 class="sectiontitle">High Reliability</h4><p id="nosql_01_0002__p7359175513219"><strong id="nosql_01_0002__b7377152884419">Data backup</strong></p>
<p id="nosql_01_0002__p735915554321">Data can be backed up automatically or manually. In an automated backup, all of the data in a given DB instance is backed up by the system. In a manual backup, the user backs up the data. These backups can be used to restore a DB instance in just a few clicks.</p>
<p id="nosql_01_0002__p203596558321">Backups are stored in Object Storage Service (OBS) buckets, which provides disaster recovery capabilities and save space. When you create a DB instance, the automated backup policy is enabled by default. After the creation is complete, an automated full backup is triggered instantly. The backup retention period is 7 days by default. You can set the backup retention period and modify the backup policy. In addition, you can initiate backup at any time according to your service requirements. Manual backups are saved until you manually delete them.</p>
</div>
<div class="section" id="nosql_01_0002__section165162218211"><h4 class="sectiontitle">High Security</h4><p id="nosql_01_0002__p161229163810"><strong id="nosql_01_0002__b16544103105420">Network isolation</strong></p>
<p id="nosql_01_0002__p3611299385">GeminiDB uses Virtual Private Clouds (VPCs) and network security groups to keep DB instances isolated. VPCs allow you to define which IP addresses are allowed to access a given database. Running a DB instance in a VPC improves security. To further enhance database security, you can configure subnets and security groups to control access to DB instances.</p>
<p id="nosql_01_0002__p14613293387"><strong id="nosql_01_0002__b16229286592">Access control</strong></p>
<p id="nosql_01_0002__p1361112916383">VPC security groups can be configured with rules to control traffic to and from DB instances.</p>
<p id="nosql_01_0002__p19611298382"><strong id="nosql_01_0002__b883205015920">Encryption</strong></p>
<p id="nosql_01_0002__p761142913817">GeminiDB uses Secure Sockets Layer (SSL) to encrypt transmitted data. You can download the root CA certificate from the management console and upload it for authentication when connecting to a database.</p>
<p id="nosql_01_0002__p1761129103818"><strong id="nosql_01_0002__b54453429017">Security</strong></p>
<p id="nosql_01_0002__p5611729163810"><span id="nosql_01_0002__text1717315514307">GeminiDB</span> supports multi-layer network protection. The security system consists of VPCs, subnets, security groups, Anti-DDoS, and SSL, which collectively can defend against a wide range of attacks and keep your data secure.</p>
<ul id="nosql_01_0002__ul1761629173816"><li id="nosql_01_0002__li561132914381">VPCs isolate resources and control access.</li><li id="nosql_01_0002__li2612293384">SSL connections ensure data security and integrity.</li><li id="nosql_01_0002__li261192913815">Security group rules control traffic to and from specific IP addresses and ports, protecting connections between <span id="nosql_01_0002__text663733343119">GeminiDB</span> and other services.</li></ul>
<p id="nosql_01_0002__p116172916386"><strong id="nosql_01_0002__b1726118106117">Performance monitoring</strong></p>
<p id="nosql_01_0002__p36132913385"><span id="nosql_01_0002__text3932163643019">GeminiDB</span> monitors instance performance, reducing 60% of O&amp;M activities. It provides real-time monitoring information about CPU utilization, disk usage, IOPS, and number of active connections, allowing you to check instance status at any time.</p>
</div>
<div class="section" id="nosql_01_0002__section103445366216"><h4 class="sectiontitle">Convenience</h4><p id="nosql_01_0002__p1835185615118"><strong id="nosql_01_0002__b4693103018216">Ready to use out of the box</strong></p>
<p id="nosql_01_0002__p5158845122120">You can create a DB instance on the management console and access the database over a private network to reduce latency and avoid the cost of using a public network.</p>
</div>
<div class="section" id="nosql_01_0002__section071616492218"><h4 class="sectiontitle">Scalability</h4><p id="nosql_01_0002__p15870192614412">As a distributed database service with decoupled compute and storage architecture, <span id="nosql_01_0002__text11907191718313">GeminiDB</span> supports minute-level compute node expansion and second-level storage expansion.</p>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_user_guide.html">Introduction</a></div>
</div>
</div>

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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>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_user_guide.html">Introduction</a></div>
</div>
</div>

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<a name="nosql_01_0004"></a><a name="nosql_01_0004"></a>
<h1 class="topictitle1">DB Instance</h1>
<div id="body1566526086212"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="nosql_01_0110.html">Overview</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_01_0007.html">Compatible APIs and Versions</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_01_0006.html">DB Instance Specifications</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_01_0008.html">DB Instance Status</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_user_guide.html">Introduction</a></div>
</div>
</div>

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<h1 class="topictitle1">DB Instance Specifications</h1>
<div id="body1566526239327"><div class="note" id="nosql_01_0006__note1167815161239"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="nosql_01_0006__p9171127163018">The DB instance specifications depend on the selected DB engine.</p>
</div></div>
<div class="section" id="nosql_01_0006__section17517174716137"><h4 class="sectiontitle">GeminiDB Cassandra Instance Specifications</h4>
<div class="tablenoborder"><a name="nosql_01_0006__table33151750124715"></a><a name="table33151750124715"></a><table cellpadding="4" cellspacing="0" summary="" id="nosql_01_0006__table33151750124715" frame="border" border="1" rules="all"><caption><b>Table 1 </b>GeminiDB Cassandra cluster instance specifications</caption><thead align="left"><tr id="nosql_01_0006__row8316115011475"><th align="left" class="cellrowborder" valign="top" width="32%" id="mcps1.3.2.2.2.5.1.1"><p id="nosql_01_0006__p16316550194718">Flavor</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="20%" id="mcps1.3.2.2.2.5.1.2"><p id="nosql_01_0006__p1331625034716">vCPUs</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="21%" id="mcps1.3.2.2.2.5.1.3"><p id="nosql_01_0006__p12316115084718">Memory (GB)</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="27%" id="mcps1.3.2.2.2.5.1.4"><p id="nosql_01_0006__p1431612503474">Max. Storage Space (GB)</p>
</th>
</tr>
</thead>
<tbody><tr id="nosql_01_0006__row1231610501472"><td class="cellrowborder" valign="top" width="32%" headers="mcps1.3.2.2.2.5.1.1 "><p id="nosql_01_0006__p19316155017471">geminidb.cassandra.xlarge.8</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.2.5.1.2 "><p id="nosql_01_0006__p8317185054715">4</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.2.2.2.5.1.3 "><p id="nosql_01_0006__p6317115015475">32</p>
</td>
<td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.2.5.1.4 "><p id="nosql_01_0006__p931735064711">24,000</p>
</td>
</tr>
<tr id="nosql_01_0006__row143171350204713"><td class="cellrowborder" valign="top" width="32%" headers="mcps1.3.2.2.2.5.1.1 "><p id="nosql_01_0006__p1331765004718">geminidb.cassandra.2xlarge.8</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.2.5.1.2 "><p id="nosql_01_0006__p931795015474">8</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.2.2.2.5.1.3 "><p id="nosql_01_0006__p153171650194710">64</p>
</td>
<td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.2.5.1.4 "><p id="nosql_01_0006__p143171950174716">48,000</p>
</td>
</tr>
<tr id="nosql_01_0006__row831875014716"><td class="cellrowborder" valign="top" width="32%" headers="mcps1.3.2.2.2.5.1.1 "><p id="nosql_01_0006__p19318165074718">geminidb.cassandra.4xlarge.8</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.2.5.1.2 "><p id="nosql_01_0006__p13318950194712">16</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.2.2.2.5.1.3 "><p id="nosql_01_0006__p031810501474">128</p>
</td>
<td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.2.5.1.4 "><p id="nosql_01_0006__p2318195016476">96,000</p>
</td>
</tr>
<tr id="nosql_01_0006__row5318950114714"><td class="cellrowborder" valign="top" width="32%" headers="mcps1.3.2.2.2.5.1.1 "><p id="nosql_01_0006__p1331810508475">geminidb.cassandra.6xlarge.8</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.2.5.1.2 "><p id="nosql_01_0006__p113190507479">24</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.2.2.2.5.1.3 "><p id="nosql_01_0006__p2319185017471">192</p>
</td>
<td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.2.5.1.4 "><p id="nosql_01_0006__p131985019474">144,000</p>
</td>
</tr>
<tr id="nosql_01_0006__row1319165020477"><td class="cellrowborder" valign="top" width="32%" headers="mcps1.3.2.2.2.5.1.1 "><p id="nosql_01_0006__p8319125020479">geminidb.cassandra.8xlarge.8</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.2.5.1.2 "><p id="nosql_01_0006__p16319145094715">32</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.2.2.2.5.1.3 "><p id="nosql_01_0006__p133197508471">256</p>
</td>
<td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.2.5.1.4 "><p id="nosql_01_0006__p8319350144713">192,000</p>
</td>
</tr>
<tr id="nosql_01_0006__row732018503478"><td class="cellrowborder" valign="top" width="32%" headers="mcps1.3.2.2.2.5.1.1 "><p id="nosql_01_0006__p332035044712">geminidb.cassandra.12xlarge.8</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.2.5.1.2 "><p id="nosql_01_0006__p19320175034712">48</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.2.2.2.5.1.3 "><p id="nosql_01_0006__p53202506477">384</p>
</td>
<td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.2.5.1.4 "><p id="nosql_01_0006__p16320150124720">288,000</p>
</td>
</tr>
<tr id="nosql_01_0006__row1320250124719"><td class="cellrowborder" valign="top" width="32%" headers="mcps1.3.2.2.2.5.1.1 "><p id="nosql_01_0006__p11320850174714">geminidb.cassandra.15xlarge.8</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.2.2.2.5.1.2 "><p id="nosql_01_0006__p432075074715">60</p>
</td>
<td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.2.2.2.5.1.3 "><p id="nosql_01_0006__p9320150204713">480</p>
</td>
<td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.2.5.1.4 "><p id="nosql_01_0006__p932055084715">384,000</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_01_0004.html">DB Instance</a></div>
</div>
</div>

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<a name="nosql_01_0007"></a><a name="nosql_01_0007"></a>
<h1 class="topictitle1">Compatible APIs and Versions</h1>
<div id="body1566526239327"><p id="nosql_01_0007__p26295183167">This section lists the <span id="nosql_01_0007__text936083732820">GeminiDB</span>-compatible APIs and versions.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="nosql_01_0007__table281701618255" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Compatible APIs and versions</caption><thead align="left"><tr id="nosql_01_0007__row1581717166257"><th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.4.1.1"><p id="nosql_01_0007__p181751622517">Compatible API</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.4.1.2"><p id="nosql_01_0007__p2718141912582">DB Instance Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.4.1.3"><p id="nosql_01_0007__p681721652516">Version</p>
</th>
</tr>
</thead>
<tbody><tr id="nosql_01_0007__row4817161682514"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.4.1.1 "><p id="nosql_01_0007__p68171816122513">Cassandra</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.4.1.2 "><p id="nosql_01_0007__p10718819165814">Cluster</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.4.1.3 "><p id="nosql_01_0007__p178173167253">3.11</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_01_0004.html">DB Instance</a></div>
</div>
</div>

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<a name="nosql_01_0008"></a><a name="nosql_01_0008"></a>
<h1 class="topictitle1">DB Instance Status</h1>
<div id="body1566526707491"><div class="section" id="nosql_01_0008__section135515361303"><h4 class="sectiontitle">DB Instance Status</h4><p id="nosql_01_0008__p0171398317">You can determine whether a DB instance is healthy based on its status displayed on the management console.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="nosql_01_0008__ta8e30128dae74adba4d88ae180288ac5" frame="border" border="1" rules="all"><caption><b>Table 1 </b>DB instance statuses</caption><thead align="left"><tr id="nosql_01_0008__r2aaeaca2ae2a4cb5b9fbb49e5f0be784"><th align="left" class="cellrowborder" valign="top" width="22.45%" id="mcps1.3.1.3.2.3.1.1"><p id="nosql_01_0008__acac809fed8be41ef99fe6170d519f402">Status</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="77.55%" id="mcps1.3.1.3.2.3.1.2"><p id="nosql_01_0008__ae4e7c52e4cd64669b9d8ddbe2fcf1001">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="nosql_01_0008__r2b715a4b06d4496187d21c3c88a2415b"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__accdc25b04b4047508a13e07b900a9646">Available</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__a49aa47c257a141ecbae664a8c93ec72a">DB instance is available.</p>
</td>
</tr>
<tr id="nosql_01_0008__rdc652434ec1b42239e0659c0ff1eebe4"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__a2fcdb91ffa7f412790c529def0d09354">Abnormal</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__a66fa42cfeefe4bb49b3d2852fed43c5d">DB instance is faulty.</p>
</td>
</tr>
<tr id="nosql_01_0008__r75f245ae4f3f49ee9f57da5f4ffae2e7"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__a07f39b184b8e47f589cb110b159bc085">Creating</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__a64a5bd8080f24c2694b2090070917e9b">DB instance is being created.</p>
</td>
</tr>
<tr id="nosql_01_0008__r62d49a4bc1444393856cceb41fb833a2"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__af90c5bc98fbf4a27a92f89e751b49664">Creation failed</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__a4f12fb7689be4473a4767fe050fd2aff">DB instance creation fails.</p>
</td>
</tr>
<tr id="nosql_01_0008__row8469172817415"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__p2552515716418">Restarting</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__p5427184316418">DB instance is being restarted.</p>
</td>
</tr>
<tr id="nosql_01_0008__row156961747194312"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__p11697247194316">Resetting password</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__p16035694311">Administrator password is being reset.</p>
</td>
</tr>
<tr id="nosql_01_0008__row1428203664710"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__p16430436144718">Adding node</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__p13430183611476">Nodes are being added to a DB instance.</p>
</td>
</tr>
<tr id="nosql_01_0008__row162771839114710"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__p02771939114711">Deleting node</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__p132771939124713">Nodes are being deleted from a DB instance.</p>
</td>
</tr>
<tr id="nosql_01_0008__row197503212514"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__p876932192515">Scaling up</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__p563129916418">The storage space of the DB instance is being expanded.</p>
</td>
</tr>
<tr id="nosql_01_0008__row10203111111314"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__p162048110135">Changing instance class</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__p192041410139">The CPU or memory of a DB instance is being changed.</p>
</td>
</tr>
<tr id="nosql_01_0008__row9814103210588"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__p11253143285417">Uploading backup</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__p2253232165414">The backup file is being uploaded.</p>
</td>
</tr>
<tr id="nosql_01_0008__row43443182324"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__p163371118103219">Backing up</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__p203371518123211">Backup is being created.</p>
</td>
</tr>
<tr id="nosql_01_0008__row113441818113212"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__p2633482216712">Checking restoration</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__p5274582416712">The backup of the current DB instance is being restored to a new DB instance.</p>
</td>
</tr>
<tr id="nosql_01_0008__row28251651105818"><td class="cellrowborder" valign="top" width="22.45%" headers="mcps1.3.1.3.2.3.1.1 "><p id="nosql_01_0008__p7198334142319">Switching SSL</p>
</td>
<td class="cellrowborder" valign="top" width="77.55%" headers="mcps1.3.1.3.2.3.1.2 "><p id="nosql_01_0008__p319843442313">SSL is being enabled or disabled.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_01_0004.html">DB Instance</a></div>
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<h1 class="topictitle1">Related Services</h1>
<div id="body1557995986306"><p id="nosql_01_0009__p106112309515"><a href="#nosql_01_0009__table4822192916310">Table 1</a> shows the relationship between GeminiDB and other services.</p>
<div class="tablenoborder"><a name="nosql_01_0009__table4822192916310"></a><a name="table4822192916310"></a><table cellpadding="4" cellspacing="0" summary="" id="nosql_01_0009__table4822192916310" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Relationship between GeminiDB and other services</caption><thead align="left"><tr id="nosql_01_0009__row19823182913319"><th align="left" class="cellrowborder" valign="top" width="25.28%" id="mcps1.3.2.2.3.1.1"><p id="nosql_01_0009__p88238298317">Service</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="74.72%" id="mcps1.3.2.2.3.1.2"><p id="nosql_01_0009__p782316297315">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="nosql_01_0009__row18239291333"><td class="cellrowborder" valign="top" width="25.28%" headers="mcps1.3.2.2.3.1.1 "><p id="nosql_01_0009__p16823829834"><span id="nosql_01_0009__text1116116351864">ECS</span><span id="nosql_01_0009__text167975391961"></span></p>
</td>
<td class="cellrowborder" valign="top" width="74.72%" headers="mcps1.3.2.2.3.1.2 "><p id="nosql_01_0009__p982310297311">Elastic Cloud Server (<span id="nosql_01_0009__text21271820716">ECS</span><span id="nosql_01_0009__text49242057712"></span>) provides <span id="nosql_01_0009__text6354152974913">GeminiDB</span> with elastic computing resources and a running environment for DB instances.</p>
</td>
</tr>
<tr id="nosql_01_0009__row10823102915316"><td class="cellrowborder" valign="top" width="25.28%" headers="mcps1.3.2.2.3.1.1 "><p id="nosql_01_0009__p1482316291738">VPC</p>
</td>
<td class="cellrowborder" valign="top" width="74.72%" headers="mcps1.3.2.2.3.1.2 "><p id="nosql_01_0009__p682315291138">GeminiDB uses Virtual Private Clouds (VPCs) and network security groups to keep DB instances isolated. VPCs allow you to define which IP addresses are allowed to access a given database. Running a DB instance in a VPC improves security.</p>
</td>
</tr>
<tr id="nosql_01_0009__row11602003818"><td class="cellrowborder" valign="top" width="25.28%" headers="mcps1.3.2.2.3.1.1 "><p id="nosql_01_0009__p17161701781"><span id="nosql_01_0009__text14597163032019"></span><span id="nosql_01_0009__text2684183522014">EIP</span></p>
</td>
<td class="cellrowborder" valign="top" width="74.72%" headers="mcps1.3.2.2.3.1.2 "><p id="nosql_01_0009__p121621601788">The Elastic IP (EIP) service provides independent public IP addresses and bandwidth for Internet access.</p>
</td>
</tr>
<tr id="nosql_01_0009__row1982315291432"><td class="cellrowborder" valign="top" width="25.28%" headers="mcps1.3.2.2.3.1.1 "><p id="nosql_01_0009__p582310295316"><span id="nosql_01_0009__text20519923678">OBS</span><span id="nosql_01_0009__text182181228178"></span></p>
</td>
<td class="cellrowborder" valign="top" width="74.72%" headers="mcps1.3.2.2.3.1.2 "><p id="nosql_01_0009__p8823929438">Backups are stored in Object Storage Service (OBS) to allow for disaster recovery and save space.</p>
</td>
</tr>
<tr id="nosql_01_0009__row15917357141812"><td class="cellrowborder" valign="top" width="25.28%" headers="mcps1.3.2.2.3.1.1 "><p id="nosql_01_0009__p20917857141818">TMS</p>
</td>
<td class="cellrowborder" valign="top" width="74.72%" headers="mcps1.3.2.2.3.1.2 "><p id="nosql_01_0009__p169171457101819">Tag Management Service (TMS) enables you to use tags on the management console to manage resources. TMS works with other cloud services to manage tags. TMS manages tags globally and other cloud services manage their own tags.</p>
</td>
</tr>
<tr id="nosql_01_0009__row48230291638"><td class="cellrowborder" valign="top" width="25.28%" headers="mcps1.3.2.2.3.1.1 "><p id="nosql_01_0009__p188231629933"><span id="nosql_01_0009__text16644141221011">Cloud Eye</span><span id="nosql_01_0009__text9481111821011"></span></p>
</td>
<td class="cellrowborder" valign="top" width="74.72%" headers="mcps1.3.2.2.3.1.2 "><p id="nosql_01_0009__p24405891154936"><span id="nosql_01_0009__text74906329418">Cloud Eye</span><span id="nosql_01_0009__text113217373417"></span> serves as an open monitoring platform, monitoring <span id="nosql_01_0009__text1678384018492">GeminiDB</span> resources for you. It reports alarms and issues warnings promptly to ensure that services are running properly.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_user_guide.html">Introduction</a></div>
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<h1 class="topictitle1">Typical Application Scenarios</h1>
<div id="body1558943571786"><div class="section" id="nosql_01_0010__section8477172513453"><h4 class="sectiontitle">IoT</h4><p id="nosql_01_0010__p3687103794412"><span id="nosql_01_0010__text4303161512381">GeminiDB</span> is compatible with Cassandra APIs. It is designed for write-intensive scenarios, specifically applied in manufacturing, logistics, health care, real estate, energy production, and agriculture. It can process data sent by different types of sensors for further analysis.</p>
<p id="nosql_01_0010__p1868743716445">Advantages:</p>
<ul id="nosql_01_0010__ul1966331415497"><li id="nosql_01_0010__li6664814174911"><strong id="nosql_01_0010__b1349479104210">High Write Performance</strong>: GeminiDB provides higher write performance than other NoSQL services.</li><li id="nosql_01_0010__li8664171411496"><strong id="nosql_01_0010__b74551950114211">High Scalability</strong>: Compute nodes can be scaled in or out to flexibly cope with traffic surges or large writes loads at any time.</li></ul>
</div>
<div class="section" id="nosql_01_0010__section4973744134517"><h4 class="sectiontitle">Internet</h4><p id="nosql_01_0010__p111711505446">E-commerce and entertainment websites that include product catalogs, recommendations, and personalization engines use <span id="nosql_01_0010__text102391236113816">GeminiDB</span> when they require fast reading and writing of data and high scalability. <span id="nosql_01_0010__text1762981715455">GeminiDB</span> stores visitor activities, making it easy for analysis tools to access data fast and to generate recommendations.</p>
<p id="nosql_01_0010__p1317250184418">Advantages:</p>
<ul id="nosql_01_0010__ul117364744810"><li id="nosql_01_0010__li173647154813"><strong id="nosql_01_0010__b8302191904418">High Write Performance</strong>: GeminiDB provides higher write performance than other NoSQL services.</li><li id="nosql_01_0010__li18736677484"><strong id="nosql_01_0010__b1622414477443">Big Data Analysis</strong>: GeminiDB can work with Spark to provide recommendations to your customers in real-time.</li></ul>
</div>
<div class="section" id="nosql_01_0010__section394685515450"><h4 class="sectiontitle">Finance</h4><p id="nosql_01_0010__p086912597441">With Spark′s big data analysis capabilities, <span id="nosql_01_0010__text20150144718382">GeminiDB</span> helps companies in the finance sector build risk control systems and mitigate fraud.</p>
<p id="nosql_01_0010__p1886915994413">Advantages:</p>
<p id="nosql_01_0010__p106915463817"><strong id="nosql_01_0010__b11975174174520">Big Data Analysis</strong>: Spark and other big data processing technologies enable real-time fraud detection and prevention.</p>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_user_guide.html">Introduction</a></div>
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<h1 class="topictitle1">Overview</h1>
<div id="body0000001074013669"><p id="nosql_01_0110__p1210671396">A DB instance is the minimum management unit and an independently running database. A DB instance can contain multiple user-created databases, and you can access it using the same tools and applications that you use with a stand-alone DB instance.</p>
<p id="nosql_01_0110__p1331019368182">The cloud database supports multiple instance types to meet different compute and storage requirements. Each instance type provides various flavors with different vCPU and memory configurations for you to select.</p>
<ul id="nosql_01_0110__ul73101360184"><li id="nosql_01_0110__li1431020362185">For details about instance types, see <a href="nosql_01_0007.html">Compatible APIs and Versions</a>.</li><li id="nosql_01_0110__li1310153612183">For details about all instance statuses in a lifecycle, see <a href="nosql_01_0008.html">DB Instance Status</a>.</li><li id="nosql_01_0110__li5310123617183">For details about instance specifications, see <a href="nosql_01_0006.html">DB Instance Specifications</a>.</li></ul>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_01_0004.html">DB Instance</a></div>
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<h1 class="topictitle1">User Permissions</h1>
<div id="body1597297677318"><p id="nosql_01_101__en-us_topic_0054095658_p168570320024"><span id="nosql_01_101__text10650724103212">GeminiDB</span> provides two types of user permissions by default: user management and resource management.</p>
<ul id="nosql_01_101__u8f0eb25ba1514424bc2e77eb3f260387"><li id="nosql_01_101__l2e33a568e55c47aea44c75c2f5e02509">User management refers to the management of users, user groups, and user group permissions.</li><li id="nosql_01_101__lf545eb5ff6ac4f9b925c510c02d92abc">Resource management refers to the control operations that can be performed by users on cloud service resources.</li></ul>
<p id="nosql_01_101__p64255115101012">For details about <span id="nosql_01_101__text8617195018575">GeminiDB</span> user permissions, see <a href="https://docs.otc.t-systems.com/en-us/permissions/index.html" target="_blank" rel="noopener noreferrer">Permissions</a>.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_user_guide.html">Introduction</a></div>
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<h1 class="topictitle1">Getting Started with <span id="text2419044115219">GeminiDB Cassandra</span></h1>
<div id="body1526969663349"></div>
<div>
<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_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>
</li>
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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>
</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>
</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>
<div class="section" id="nosql_02_0004__section9281154719202"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_02_0004__ol49383781586"><li id="nosql_02_0004__li93899141586"><span>Log in to the management console.</span></li><li id="nosql_02_0004__li1870917810588"><span>Click <span><img id="nosql_02_0004__image145037112071" src="en-us_image_0000001815205124.png"></span> in the upper left corner and select a region and a project.</span></li><li id="nosql_02_0004__li297543615857"><span>Click <strong id="nosql_02_0004__b16609152125710">Service List</strong>. Under <strong id="nosql_02_0004__b12610162114575">Network</strong>, click <strong id="nosql_02_0004__b1061219218575">Virtual Private Cloud</strong>.</span></li><li id="nosql_02_0004__li3171015115916"><span>In the navigation pane on the left, choose <span class="menucascade" id="nosql_02_0004__menucascade113137392162"><b><span class="uicontrol" id="nosql_02_0004__uicontrol931312398163">Access Control</span></b> &gt; <b><span class="uicontrol" id="nosql_02_0004__uicontrol103131952161613">Security Groups</span></b></span>.</span></li><li id="nosql_02_0004__li140569415930"><span>On the <strong id="nosql_02_0004__b497332911519">Security Groups</strong> page, click the security group name.</span></li><li id="nosql_02_0004__li5489049115946"><span>On the <strong id="nosql_02_0004__b4976153713515">Inbound Rules</strong> tab, click <strong id="nosql_02_0004__b1697715371258">Add Rule</strong>. In the displayed <strong id="nosql_02_0004__b297743711512">Add Inbound Rule</strong> dialog box, set required parameters to add inbound rules. On the <strong id="nosql_02_0004__b271817563411">Outbound Rules</strong> tab, click <strong id="nosql_02_0004__b37191456543">Add Rule</strong>. In the displayed <strong id="nosql_02_0004__b37191156048">Add Outbound Rule</strong> dialog box, set required parameters to add outbound rules.</span></li><li id="nosql_02_0004__li436714418571"><span>In the displayed dialog box, set required parameters.</span></li><li id="nosql_02_0004__li21369327151121"><span>Click <strong id="nosql_02_0004__b191192582312">OK</strong>.</span></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_02_0006.html">Connecting to a GeminiDB Cassandra Instance Over Private Networks</a></div>
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<h1 class="topictitle1">Connecting to a <span id="text19728925133719">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>
<p id="nosql_02_0005__p129891442191111">If the security group rule does not allow the access from the <span id="nosql_02_0005__text934501735318">ECS</span><span id="nosql_02_0005__text634681713530"></span>, you need to add an inbound rule to the security group.</p>
</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>
<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>
<p id="nosql_02_0005__p1857117560114"><strong id="nosql_02_0005__b18173152910121">./cqlsh 192.168.1.8 8635 -u rwuser</strong></p>
<div class="note" id="nosql_02_0005__note21381431122218"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="nosql_02_0005__ul18138931152220"><li id="nosql_02_0005__li8735051125619">&lt;<em id="nosql_02_0005__i1974124612912">DB_HOST</em>&gt; indicates the private IP address of the node to be connected. Obtain the value from the <span class="uicontrol" id="nosql_02_0005__uicontrol15255103614524"><b>Private IP Address</b></span> column in the node list on the <span class="uicontrol" id="nosql_02_0005__uicontrol5256183616525"><b>Basic Information</b></span> page.</li><li id="nosql_02_0005__li9743125175616">&lt;<em id="nosql_02_0005__i163941855162910">DB_PORT</em>&gt; indicates the port number. The default value is 8635 and cannot be changed.</li><li id="nosql_02_0005__li10747135112566">&lt;<em id="nosql_02_0005__i14776204133013">DB_USER</em>&gt; indicates the database account name. The default value is <strong id="nosql_02_0005__b18120171635419">rwuser</strong>.</li></ul>
</div></div>
</p></li><li id="nosql_02_0005__li2356085813016"><span>Check the connection result. If the following information is displayed, the connection is successful.</span><p><pre class="screen" id="nosql_02_0005__screen430918289155">rwuser@cqlsh&gt;</pre>
</p></li></ol>
</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>
</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>
<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>
</li></ul>
</li></ul>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_02_0006.html">Connecting to a GeminiDB Cassandra Instance Over Private Networks</a></div>
</div>
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<a name="nosql_02_0006"></a><a name="nosql_02_0006"></a>
<h1 class="topictitle1">Connecting to a <span id="text85921125912">GeminiDB Cassandra</span> Instance Over Private Networks</h1>
<div id="body1581326877926"></div>
<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>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_02_0001.html">Getting Started with GeminiDB Cassandra</a></div>
</div>
</div>

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<a name="nosql_02_0007"></a><a name="nosql_02_0007"></a>
<h1 class="topictitle1">Connecting to a <span id="text76526481814">GeminiDB Cassandra</span> Instance Over Public Networks</h1>
<div id="body1581326877926"></div>
<div>
<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>
</li>
<li class="ulchildlink"><strong><a href="nosql_02_0009.html">Connecting to a GeminiDB Cassandra Instance Over Public Networks</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_02_0001.html">Getting Started with GeminiDB Cassandra</a></div>
</div>
</div>

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<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>
<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>
</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>
</p></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_02_0007.html">Connecting to a GeminiDB Cassandra Instance Over Public Networks</a></div>
</div>
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<a name="nosql_02_0009"></a><a name="nosql_02_0009"></a>
<h1 class="topictitle1">Connecting to a <span id="text895894021116">GeminiDB Cassandra</span> Instance Over Public Networks</h1>
<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>
<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>
<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>
</div></div>
</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>
</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_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>
<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>
<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_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>
</li></ul>
</li></ul>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_02_0007.html">Connecting to a GeminiDB Cassandra Instance Over Public Networks</a></div>
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<h1 class="topictitle1">Configuring Security Group Rules</h1>
<div id="body8662426"><div class="section" id="nosql_02_0011__en-us_topic_0249811530_section3152058916230"><h4 class="sectiontitle"><strong id="nosql_02_0011__en-us_topic_0249811530_b16218454114513">Scenarios</strong></h4><p id="nosql_02_0011__en-us_topic_0249811530_p74631014182017">The default security group rule allows all outgoing data packets. <span id="nosql_02_0011__text951316477615">ECS</span><span id="nosql_02_0011__text5348852860"></span>s and <span id="nosql_02_0011__text24781231143118">GeminiDB Cassandra</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_0011__text8498185615318">GeminiDB Cassandra</span> instances that in it.</p>
<p id="nosql_02_0011__en-us_topic_0249811530_p43222116204125">This section describes how to create a security group to enable specific IP addresses and ports to access <span id="nosql_02_0011__text1699371519329">GeminiDB Cassandra</span> instances.</p>
</div>
<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>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_02_0007.html">Connecting to a GeminiDB Cassandra Instance Over Public Networks</a></div>
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<h1 class="topictitle1">DB Instance Management</h1>
<div id="body1557998522782"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="nosql_03_0025.html">Changing a DB Instance Name</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0016.html">Resetting the Administrator Password</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0003.html">Restarting a DB Instance</a></strong><br>
</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_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>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0004.html">Deleting Nodes</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0005.html">Deleting DB Instances</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0014.html">Managing Tags</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_cassandra_0001.html">Working with GeminiDB Cassandra API</a></div>
</div>
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<h1 class="topictitle1">Restarting a DB Instance</h1>
<div id="body1558943094334"><div class="section" id="nosql_03_0003__section1538841202523"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_03_0003__p5594740171230">You may need to occasionally restart a DB instance to perform routine maintenance.</p>
</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>
</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>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_03_0002.html">DB Instance Management</a></div>
</div>
</div>

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<h1 class="topictitle1">Deleting Nodes</h1>
<div id="body1567046944180"><div class="section" id="nosql_03_0004__section34286219201027"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_03_0004__p126023712118">You can delete nodes that are no longer used to release resources.</p>
</div>
<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>
</p></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_03_0002.html">DB Instance Management</a></div>
</div>
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<h1 class="topictitle1">Deleting DB Instances</h1>
<div id="body1526970514435"><div class="section" id="nosql_03_0005__section0705838113813"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_03_0005__p4782114216380">This section describes how to delete a DB instance no longer used to release resources.</p>
</div>
<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>
</p></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_03_0002.html">DB Instance Management</a></div>
</div>
</div>

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<h1 class="topictitle1">Backups and Restorations</h1>
<div id="body1564624563280"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="nosql_03_0007.html">Managing Automated Backups</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0008.html">Managing Manual Backups</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0009.html">Restoring Data to a New DB Instance</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_cassandra_0001.html">Working with GeminiDB Cassandra API</a></div>
</div>
</div>

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<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 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>
</li><li id="nosql_03_0007__li63551217124510"><strong id="nosql_03_0007__b206341571714">Backup Cycle</strong>: By default, each day of the week is selected.<ul id="nosql_03_0007__ul159594310530"><li id="nosql_03_0007__li53081017534"><strong id="nosql_03_0007__b157960161138">All</strong>: Each day of the week is selected. The system automatically backs up data every day.</li><li id="nosql_03_0007__li1910511715312">Select a cycle: You can select one or more days in a week. The system automatically backs up data at the specified time.</li></ul>
<div class="note" id="nosql_03_0007__note920410217194"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="nosql_03_0007__p720402191911">A full backup starts within one hour of the time you specify. The amount of time required for the backup depends on the amount of data to be backed up. The more data has to be backed up, the longer it will take.</p>
</div></div>
</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>
</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>
<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>
</div>
<div class="section" id="nosql_03_0007__section106721241354"><a name="nosql_03_0007__section106721241354"></a><a name="section106721241354"></a><h4 class="sectiontitle">Deleting an Automated Backup</h4><p id="nosql_03_0007__p7885171214114">If the automated backup policy is disabled, you can delete stored automated backups to free up storage space.</p>
<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>
</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>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_03_0006.html">Backups and Restorations</a></div>
</div>
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<h1 class="topictitle1">Managing Manual Backups</h1>
<div id="body1526616123141"><p id="nosql_03_0008__p3836659516932">To ensure data reliability, <span id="nosql_03_0008__text9817420154419">GeminiDB Cassandra</span> API allows you to manually back up DB instances whose status is <strong id="nosql_03_0008__b936918216531">Available</strong>. If a database or table is deleted, maliciously or accidentally, backups can help recover your data.</p>
<div class="note" id="nosql_03_0008__note1735744845310"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="nosql_03_0008__ul1991542008"><li class="msonormal" id="nosql_03_0008__li2915415014">By default, you can create up to 50 backups.</li><li id="nosql_03_0008__li139164607">Manual backups are full backups.</li></ul>
</div></div>
<div class="section" id="nosql_03_0008__section22265464242"><h4 class="sectiontitle">Creating a Manual Backup</h4><ol id="nosql_03_0008__ol31841957365"><li id="nosql_03_0008__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0008__li14507141743715"><span>Create a manual backup.</span><p><p id="nosql_03_0008__p16818558382"><strong id="nosql_03_0008__b84512022191613">Method 1</strong></p>
<p id="nosql_03_0008__p494092217383">On the <strong id="nosql_03_0008__b17891164517547">Instance Management</strong> page, locate the DB instance you wish to back up and click <strong id="nosql_03_0008__b28571321115712">Create Backup</strong> or <span class="menucascade" id="nosql_03_0008__menucascade95661644165417"><b><span class="uicontrol" id="nosql_03_0008__uicontrol65661444135415">More</span></b> &gt; <b><span class="uicontrol" id="nosql_03_0008__uicontrol116419520543">Create Backup</span></b></span> in the <strong id="nosql_03_0008__b109410115582">Operation</strong> column.</p>
<div class="msonormal" id="nosql_03_0008__p1581191418358"><strong id="nosql_03_0008__b13288185861610">Method 2</strong><ol type="a" id="nosql_03_0008__ol1780103843719"><li class="msonormal" id="nosql_03_0008__li1680838143717">On the <span class="uicontrol" id="nosql_03_0008__uicontrol17131142631619"><b>Instance Management</b></span> page, click the DB instance you wish to back up.</li><li class="msonormal" id="nosql_03_0008__li1595074110372">On the <span class="uicontrol" id="nosql_03_0008__uicontrol18321930181613"><b>Backups &amp; Restorations</b></span> page, click <span class="uicontrol" id="nosql_03_0008__uicontrol5331630161616"><b>Create Backup</b></span>.</li></ol>
</div>
<p id="nosql_03_0008__p6666171553510"><strong id="nosql_03_0008__b36583671313">Method 3</strong></p>
<p id="nosql_03_0008__p189621054142">In the navigation pane on the left, choose <strong id="nosql_03_0008__b16801124361810">Backup Management</strong>. On the displayed page, click <strong id="nosql_03_0008__b168527559182">Create Backup</strong>.</p>
</p></li><li class="msonormal" id="nosql_03_0008__li17184155133616"><span>In the displayed dialog box, enter the backup name and description, and click <strong id="nosql_03_0008__b81883125190">OK</strong>.</span><p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="nosql_03_0008__table151151524569" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Parameter description</caption><thead align="left"><tr id="nosql_03_0008__row8115142416611"><th align="left" class="cellrowborder" valign="top" width="21%" id="mcps1.3.3.2.3.2.1.2.3.1.1"><p id="nosql_03_0008__p16115162414611"><strong id="nosql_03_0008__b259973410191">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="79%" id="mcps1.3.3.2.3.2.1.2.3.1.2"><p id="nosql_03_0008__p181155246612"><strong id="nosql_03_0008__b1929593611919">Description</strong></p>
</th>
</tr>
</thead>
<tbody><tr id="nosql_03_0008__row1111513247620"><td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.3.2.3.2.1.2.3.1.1 "><p id="nosql_03_0008__p911562414619">DB Instance Name</p>
</td>
<td class="cellrowborder" valign="top" width="79%" headers="mcps1.3.3.2.3.2.1.2.3.1.2 "><p id="nosql_03_0008__p151156241862">The default value is the name of the DB instance to be backed up and cannot be modified.</p>
</td>
</tr>
<tr id="nosql_03_0008__row4115124765"><td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.3.2.3.2.1.2.3.1.1 "><p id="nosql_03_0008__p01161924969">Backup Name</p>
</td>
<td class="cellrowborder" valign="top" width="79%" headers="mcps1.3.3.2.3.2.1.2.3.1.2 "><p id="nosql_03_0008__p131161924966">The backup name must be 4 to 64 characters in length and start with a letter. Backup names are case-insensitive and can only contain letters, digits, hyphens (-), and underscores (_).</p>
</td>
</tr>
<tr id="nosql_03_0008__row011662415617"><td class="cellrowborder" valign="top" width="21%" headers="mcps1.3.3.2.3.2.1.2.3.1.1 "><p id="nosql_03_0008__p16116324663">Description</p>
</td>
<td class="cellrowborder" valign="top" width="79%" headers="mcps1.3.3.2.3.2.1.2.3.1.2 "><p id="nosql_03_0008__p1911617241867">The description contains a maximum of 256 characters and cannot include line breaks or the following special characters: &gt;!&lt;"&amp;'=</p>
</td>
</tr>
</tbody>
</table>
</div>
</p></li><li id="nosql_03_0008__li178798445512"><span>View the backup status after the task has been executed.</span><p><ul id="nosql_03_0008__ul39527143513"><li id="nosql_03_0008__li2801344164511">During the creation of a manual backup, you can query the backup status on the <strong id="nosql_03_0008__b164819204438">Backup Management</strong> page or the <strong id="nosql_03_0008__b204831207436">Backups &amp; Restorations</strong> page. The backup status is <strong id="nosql_03_0008__b1348419206439">Backing up</strong>.</li><li id="nosql_03_0008__li1088714311462">If a manual backup was successfully created, the backup status is <strong id="nosql_03_0008__b356403254614">Completed</strong>.</li></ul>
</p></li></ol>
</div>
<div class="section" id="nosql_03_0008__section10792915310"><h4 class="sectiontitle">Deleting a Manual Backup</h4><p id="nosql_03_0008__p14474254311">If you do not need the manual backup, you can delete it on the <strong id="nosql_03_0008__b10831720134713">Backup Management</strong> page or the<strong id="nosql_03_0008__b1984920194710"> Backups &amp; Restorations</strong> page.</p>
<p id="nosql_03_0008__p18981312456">Deleted backups are not displayed in the backup list.</p>
<div class="notice" id="nosql_03_0008__note37121952185118"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="nosql_03_0008__p371255212516">The deletion operation is irreversible, so exercise caution when performing this operation.</p>
</div></div>
<div class="p" id="nosql_03_0008__p15406835143319"><strong id="nosql_03_0008__b16234123916473">Method 1</strong><ol id="nosql_03_0008__ol139751532112114"><li class="msonormal" id="nosql_03_0008__li897514326214">On the <span class="uicontrol" id="nosql_03_0008__uicontrol126450406479"><b>Instance Management</b></span> page, click the DB instance whose backup you wish to delete.</li><li class="msonormal" id="nosql_03_0008__li1097512329215">On the <span class="uicontrol" id="nosql_03_0008__uicontrol1863684412472"><b>Backups &amp; Restorations</b></span> page, locate the backup you wish to delete and click <span class="uicontrol" id="nosql_03_0008__uicontrol19637114424713"><b>Delete</b></span>.</li><li id="nosql_03_0008__li183831420123910">In the <strong id="nosql_03_0008__b139761048201018">Delete Backup</strong> dialog box, confirm the backup details and click <strong id="nosql_03_0008__b1997794801011">Yes</strong>.</li></ol>
</div>
<p id="nosql_03_0008__p9831127163813"><strong id="nosql_03_0008__b4441135565016">Method 2</strong></p>
<ol id="nosql_03_0008__ol18117134723814"><li id="nosql_03_0008__li011714473388">On the <span class="uicontrol" id="nosql_03_0008__uicontrol155318581501"><b>Backup Management</b></span> page, locate the target backup and click <span class="uicontrol" id="nosql_03_0008__uicontrol754358155014"><b>Delete</b></span>.</li><li id="nosql_03_0008__li1981195211386">In the <strong id="nosql_03_0008__b1490513191110">Delete Backup</strong> dialog box, confirm the backup details and click <strong id="nosql_03_0008__b59059318117">Yes</strong>.</li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_03_0006.html">Backups and Restorations</a></div>
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<h1 class="topictitle1">Restoring Data to a New DB Instance</h1>
<div id="body1561796825410"><div class="section" id="nosql_03_0009__section3037032812838"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_03_0009__p2898859142259"><span id="nosql_03_0009__text59721931194419">GeminiDB Cassandra</span> API allows you to restore the existing backup to a new DB instance.</p>
</div>
<div class="section" id="nosql_03_0009__section1517018587283"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0009__ol3169892816474"><li id="nosql_03_0009__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0009__li4533738135159"><span>Restore a DB instance from the backup.</span><p><p id="nosql_03_0009__p421782611362"><strong id="nosql_03_0009__b8423527061662">Method 1</strong></p>
<ol type="a" id="nosql_03_0009__ol142518471376"><li id="nosql_03_0009__li125164713373">On the <strong id="nosql_03_0009__b84235270615219">Instance Management</strong> page, click the target DB instance.</li><li id="nosql_03_0009__li1191285315378">On the <span class="uicontrol" id="nosql_03_0009__uicontrol2380715141811"><b>Backups &amp; Restorations</b></span> page, locate the target backup and click <span class="uicontrol" id="nosql_03_0009__uicontrol938111153187"><b>Restore</b></span>.</li></ol>
<p id="nosql_03_0009__p11747207164319"><strong id="nosql_03_0009__b1218305212161736">Method 2</strong></p>
<p id="nosql_03_0009__p87441650204314">On the <span class="uicontrol" id="nosql_03_0009__uicontrol13891350171813"><b>Backup Management</b></span> page, locate the target backup and click <span class="uicontrol" id="nosql_03_0009__uicontrol1490195061817"><b>Restore</b></span>.</p>
</p></li><li id="nosql_03_0009__li1263239616537"><span>In the displayed dialog box, confirm the current instance details and restoration method and click <strong id="nosql_03_0009__b112841125192510">OK</strong>.</span><p><ul id="nosql_03_0009__ul77342022805"><li id="nosql_03_0009__li2734122605">The default API type and DB engine version are the same as those of the original instance and cannot be changed. </li><li id="nosql_03_0009__li1973472217017">GeminiDB automatically calculates the minimum storage space required for restoration based on the size of the selected backup file. The storage space depends on the instance specifications, and must be a multiple of 10 GB.</li><li id="nosql_03_0009__li1373415221903">You need to set a new administrator password.</li></ul>
<ul id="nosql_03_0009__ul11734112216016"><li id="nosql_03_0009__li1973417221008">To modify other parameters, see the description of creating DB instances of other DB engines in the <em id="nosql_03_0009__i13971346101616">Getting Started</em>.</li></ul>
</p></li><li id="nosql_03_0009__li28057821151656"><span>View the restoration results.</span><p><p id="nosql_03_0009__p13927141814199">A new DB instance is created using the backup data. The status of the DB instance changes from <strong id="nosql_03_0009__b3829408514">Creating</strong> to <strong id="nosql_03_0009__b153416443516">Available</strong>.</p>
<p id="nosql_03_0009__p12580181415516">After the restoration, the system will perform a full backup.</p>
<p id="nosql_03_0009__p31459127152145">The new DB instance is independent from the original one.</p>
</p></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_03_0006.html">Backups and Restorations</a></div>
</div>
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<h1 class="topictitle1">Monitoring and Alarm Reporting</h1>
<div id="body1564624563280"><p id="nosql_03_0010__p8060118"></p>
</div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="nosql_03_0011.html">GeminiDB Cassandra Metrics</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0012.html">Setting Alarm Rules</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0013.html">Viewing Metrics</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_cassandra_0001.html">Working with GeminiDB Cassandra API</a></div>
</div>
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<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>
</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>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_03_0010.html">Monitoring and Alarm Reporting</a></div>
</div>
</div>

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