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reverting DRS changes to state before gaussdbmysql_api #815

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vladimirhasko 2023-08-15 07:59:39 +00:00 committed by Hasko, Vladimir
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71 changed files with 1734 additions and 3013 deletions
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<td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.3.5.2.5.1.3 "><ul id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_ul53231027193219"><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li9198123017320">Replica set -&gt; Single node</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li342153293214">Replica set -&gt; Replica set</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li733912345321">Replica set -&gt; Cluster</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li16698203743211">Single node -&gt; Single node</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li74801041173217">Single node -&gt; Replica set</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li1426154553218">Single node -&gt; Cluster</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li1632352714327">Cluster -&gt; Cluster</li></ul> <td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.3.5.2.5.1.3 "><ul id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_ul53231027193219"><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li9198123017320">Replica set -&gt; Single node</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li342153293214">Replica set -&gt; Replica set</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li733912345321">Replica set -&gt; Cluster</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li16698203743211">Single node -&gt; Single node</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li74801041173217">Single node -&gt; Replica set</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li1426154553218">Single node -&gt; Cluster</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li1632352714327">Cluster -&gt; Cluster</li></ul>
</td> </td>
<td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.3.5.2.5.1.4 "><ul id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_ul4445175963120"><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li10680921323">Replica set -&gt; Single node</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li18805243320">Replica set -&gt; Replica set</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li149451764324">Replica set -&gt; Cluster</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li493015853217">Single node -&gt; Single node</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li78901103210">Single node -&gt; Replica set</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li164455592318">Single node -&gt; Cluster</li></ul> <td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.3.5.2.5.1.4 "><ul id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_ul4445175963120"><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li10680921323">Replica set -&gt; Single node</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li18805243320">Replica set -&gt; Replica set</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li149451764324">Replica set -&gt; Cluster</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li493015853217">Single node -&gt; Single node</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li78901103210">Single node -&gt; Replica set</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li164455592318">Single node -&gt; Cluster</li></ul>
<div class="note" id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_note36598412583"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="drs_01_0301__p1839518672715">If you need to perform an incremental migration for a single-node instance, the source database must be the DDS single-node instance.</p> <div class="note" id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_note36598412583"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_ul13111523133717"><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li116068279377">If you need to perform an incremental migration for a single-node instance, the source database must be the DDS single-node instance.</li><li id="drs_01_0301__en-us_topic_0000001205509269_en-us_topic_0000001147220024_en-us_topic_0000001102794420_li426614465316">The source database cannot be a GaussDB(for Mongo) instance.</li></ul>
</div></div> </div></div>
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<tr id="drs_02_0002__drs_04_0088_row19827128212"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.3.2.3.2.2.1.1.2.3.1.1 "><p id="drs_02_0002__drs_04_0088_p1882715215211">SSL Connection</p> <tr id="drs_02_0002__drs_04_0088_row19827128212"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.3.2.3.2.2.1.1.2.3.1.1 "><p id="drs_02_0002__drs_04_0088_p1882715215211">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.3.2.3.2.2.1.1.2.3.1.2 "><p id="drs_02_0002__drs_04_0088_p68272021522">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.3.2.3.2.2.1.1.2.3.1.2 "><p id="drs_02_0002__drs_04_0088_p68272021522">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_02_0002__drs_04_0088_note118041213163"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_02_0002__drs_04_0088_ul266710518121"><li id="drs_02_0002__drs_04_0088_li36671451181216">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_02_0002__drs_04_0088_li1657285318124">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_02_0002__drs_04_0088_note118041213163"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_02_0002__drs_04_0088_ul266710518121"><li id="drs_02_0002__drs_04_0088_li36671451181216">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_02_0002__drs_04_0088_li1657285318124">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
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<tr id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_row2592193212194"><td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.3.2.4.2.1.2.3.1.1 "><p id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p7592232201911">Migrate Account</p> <tr id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_row2592193212194"><td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.3.2.4.2.1.2.3.1.1 "><p id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p7592232201911">Migrate Account</p>
</td> </td>
<td class="cellrowborder" valign="top" width="75%" headers="mcps1.3.3.2.4.2.1.2.3.1.2 "><p id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p11670239171013">During a database migration, accounts need to be migrated separately.</p> <td class="cellrowborder" valign="top" width="75%" headers="mcps1.3.3.2.4.2.1.2.3.1.2 "><p id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p11670239171013">During a database migration, accounts need to be migrated separately.</p>
<div class="p" id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p106411111205412">There are accounts that can be migrated completely, accounts whose permissions need to be reduced, and accounts that cannot be migrated. You can choose whether to migrate the accounts based on service requirements. If you select <span class="uicontrol" id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_uicontrol1845534122119"><b>Yes</b></span>, you can select the accounts to be migrated as required.<ul id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_ul52489455107"><li id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_li52487450107"><strong id="drs_02_0002__drs_04_0088_b1182679">Yes</strong><p id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_p10236114416406">If you need to migrate accounts, see <a href="drs_09_0017.html">Migrating Accounts</a>.</p> <div class="p" id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p106411111205412">There are accounts that can be migrated completely, accounts whose permissions need to be reduced, and accounts that cannot be migrated. You can choose whether to migrate the accounts based on service requirements. If you select <span class="uicontrol" id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_uicontrol1845534122119"><b>Yes</b></span>, you can select the accounts to be migrated as required.<ul id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_ul52489455107"><li id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_li52487450107"><strong id="drs_02_0002__drs_04_0088_b816160519">Yes</strong><p id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_p10236114416406">If you need to migrate accounts, see <a href="drs_09_0017.html">Migrating Accounts</a>.</p>
</li></ul> </li></ul>
</div> </div>
<ul id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_ul17378301111"><li id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_li07371535115"><strong id="drs_02_0002__drs_04_0088_b532696104">No</strong><p id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p794655681211">During migration, accounts, permissions, and passwords are not migrated.</p> <ul id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_ul17378301111"><li id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_li07371535115"><strong id="drs_02_0002__drs_04_0088_b310462314">No</strong><p id="drs_02_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p794655681211">During migration, accounts, permissions, and passwords are not migrated.</p>
</li></ul> </li></ul>
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<div id="body8662426"><p id="drs_02_0100__en-us_topic_0000001160307850_p1930144313422">Before data migration, ensure that network preparations and security rule settings are complete. If the connection is abnormal, check whether the network configuration is correct.</p> <div id="body8662426"><p id="drs_02_0100__en-us_topic_0000001160307850_p1930144313422">Before data migration, ensure that network preparations and security rule settings are complete. If the connection is abnormal, check whether the network configuration is correct.</p>
<p id="drs_02_0100__en-us_topic_0000001160307850_p12956195818232">This section uses the migration from MySQL to RDS MySQL as an example to describe three migration scenarios: cross-cloud real-time migration, on-premises database migration, and real-time migration of self-built ECS databases.</p> <p id="drs_02_0100__en-us_topic_0000001160307850_p12956195818232">This section uses the migration from MySQL to RDS MySQL as an example to describe three migration scenarios: cross-cloud real-time migration, on-premises database migration, and real-time migration of self-built ECS databases.</p>
<div class="section" id="drs_02_0100__en-us_topic_0000001160307850_section1981111255253"><h4 class="sectiontitle">Cross-Cloud Real-Time Migration</h4><ol id="drs_02_0100__en-us_topic_0000001160307850_ol154470952610"><li id="drs_02_0100__en-us_topic_0000001160307850_li1655110212613">Network settings<div class="p" id="drs_02_0100__en-us_topic_0000001160307850_p134881133613"><a name="drs_02_0100__en-us_topic_0000001160307850_li1655110212613"></a><a name="en-us_topic_0000001160307850_li1655110212613"></a>Enable public accessibility for the source database.<ul id="drs_02_0100__en-us_topic_0000001160307850_ul134831211137"><li id="drs_02_0100__en-us_topic_0000001160307850_li8560181115494">Source database network settings:<p id="drs_02_0100__en-us_topic_0000001160307850_p88101112124911"><a name="drs_02_0100__en-us_topic_0000001160307850_li8560181115494"></a><a name="en-us_topic_0000001160307850_li8560181115494"></a>Enable public accessibility for the source database.</p> <div class="section" id="drs_02_0100__en-us_topic_0000001160307850_section1981111255253"><h4 class="sectiontitle">Cross-Cloud Real-Time Migration</h4><ol id="drs_02_0100__en-us_topic_0000001160307850_ol154470952610"><li id="drs_02_0100__en-us_topic_0000001160307850_li1655110212613">Network settings<div class="p" id="drs_02_0100__en-us_topic_0000001160307850_p134881133613"><a name="drs_02_0100__en-us_topic_0000001160307850_li1655110212613"></a><a name="en-us_topic_0000001160307850_li1655110212613"></a>Enable public accessibility for the source database.<ul id="drs_02_0100__en-us_topic_0000001160307850_ul134831211137"><li id="drs_02_0100__en-us_topic_0000001160307850_li8560181115494">Source database network settings:<p id="drs_02_0100__en-us_topic_0000001160307850_p88101112124911"><a name="drs_02_0100__en-us_topic_0000001160307850_li8560181115494"></a><a name="en-us_topic_0000001160307850_li8560181115494"></a>Enable public accessibility for the source database.</p>
<p id="drs_02_0100__en-us_topic_0000001160307850_p17616141335">For details, see related documents provided by other Cloud.</p> <p id="drs_02_0100__en-us_topic_0000001160307850_p17616141335">For details, see related documents provided by Alibaba Cloud.</p>
</li><li id="drs_02_0100__en-us_topic_0000001160307850_li129304223410">Destination database network settings:<p id="drs_02_0100__en-us_topic_0000001160307850_p91955250418"><a name="drs_02_0100__en-us_topic_0000001160307850_li129304223410"></a><a name="en-us_topic_0000001160307850_li129304223410"></a>By default, the destination database and the DRS replication instance are in the same VPC and can communicate with each other. No further configuration is required.</p> </li><li id="drs_02_0100__en-us_topic_0000001160307850_li129304223410">Destination database network settings:<p id="drs_02_0100__en-us_topic_0000001160307850_p91955250418"><a name="drs_02_0100__en-us_topic_0000001160307850_li129304223410"></a><a name="en-us_topic_0000001160307850_li129304223410"></a>By default, the destination database and the DRS replication instance are in the same VPC and can communicate with each other. No further configuration is required.</p>
</li></ul> </li></ul>
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<tr id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_row2592193212194"><td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.4.2.3.2.1.2.3.1.1 "><p id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p7592232201911">Migrate Account</p> <tr id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_row2592193212194"><td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.4.2.3.2.1.2.3.1.1 "><p id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p7592232201911">Migrate Account</p>
</td> </td>
<td class="cellrowborder" valign="top" width="75%" headers="mcps1.3.4.2.3.2.1.2.3.1.2 "><p id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p11670239171013">During a database migration, accounts need to be migrated separately.</p> <td class="cellrowborder" valign="top" width="75%" headers="mcps1.3.4.2.3.2.1.2.3.1.2 "><p id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p11670239171013">During a database migration, accounts need to be migrated separately.</p>
<div class="p" id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p106411111205412">There are accounts that can be migrated completely, accounts whose permissions need to be reduced, and accounts that cannot be migrated. You can choose whether to migrate the accounts based on service requirements. If you select <span class="uicontrol" id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_uicontrol1845534122119"><b>Yes</b></span>, you can select the accounts to be migrated as required.<ul id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_ul52489455107"><li id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_li52487450107"><strong id="drs_03_0002__drs_04_0088_b1182679">Yes</strong><p id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_p10236114416406">If you need to migrate accounts, see <a href="drs_09_0017.html">Migrating Accounts</a>.</p> <div class="p" id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p106411111205412">There are accounts that can be migrated completely, accounts whose permissions need to be reduced, and accounts that cannot be migrated. You can choose whether to migrate the accounts based on service requirements. If you select <span class="uicontrol" id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_uicontrol1845534122119"><b>Yes</b></span>, you can select the accounts to be migrated as required.<ul id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_ul52489455107"><li id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_li52487450107"><strong id="drs_03_0002__drs_04_0088_b816160519">Yes</strong><p id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_p10236114416406">If you need to migrate accounts, see <a href="drs_09_0017.html">Migrating Accounts</a>.</p>
</li></ul> </li></ul>
</div> </div>
<ul id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_ul17378301111"><li id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_li07371535115"><strong id="drs_03_0002__drs_04_0088_b532696104">No</strong><p id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p794655681211">During migration, accounts, permissions, and passwords are not migrated.</p> <ul id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_ul17378301111"><li id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_li07371535115"><strong id="drs_03_0002__drs_04_0088_b310462314">No</strong><p id="drs_03_0002__drs_04_0088_en-us_topic_0135097933_en-us_topic_0078078071_p794655681211">During migration, accounts, permissions, and passwords are not migrated.</p>
</li></ul> </li></ul>
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<h1 class="topictitle1">Modifying the Flow Control Mode</h1> <h1 class="topictitle1">Modifying the Flow Control Mode</h1>
<div id="body1586335509477"><p id="drs_03_0046__p12553528014">You can choose whether to control the flow. DRS allows you to change the flow control mode after a task is created. Currently, only the following real-time migration types support this function:</p> <div id="body1586335509477"><p id="drs_03_0046__p12553528014">You can choose whether to control the flow. DRS allows you to change the flow control mode after a task is created. Currently, only the following real-time migration types support this function:</p>
<ul id="drs_03_0046__ul672911951510"><li id="drs_03_0046__li572916910150">To the cloud<ul id="drs_03_0046__ul2390200151"><li id="drs_03_0046__li114741013101511">MySQL-&gt;MySQL</li><li id="drs_03_0046__li14142102417275">MongoDB-&gt;DDS</li></ul> <ul id="drs_03_0046__ul672911951510"><li id="drs_03_0046__li572916910150">To the cloud<ul id="drs_03_0046__ul2390200151"><li id="drs_03_0046__li114741013101511">MySQL-&gt;MySQL</li></ul>
</li><li id="drs_03_0046__li1415725521515">From of the cloud<ul id="drs_03_0046__ul29145412164"><li id="drs_03_0046__li18188281161">MySQL-&gt;MySQL</li><li id="drs_03_0046__li16886428142717">DDS-&gt;MongoDB</li></ul> </li><li id="drs_03_0046__li1415725521515">From of the cloud<ul id="drs_03_0046__ul29145412164"><li id="drs_03_0046__li18188281161">MySQL-&gt;MySQL</li></ul>
</li></ul> </li></ul>
<div class="note" id="drs_03_0046__en-us_topic_0135097933_note133345121551"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_03_0046__ul153719333619"><li id="drs_03_0046__li7372633561">Flow control mode takes effect only during a full migration.</li><li id="drs_03_0046__li1687520372614">After the traffic rate is modified in the incremental migration phase, the modification takes effect when the task enters the full migration phase again.</li></ul> <div class="note" id="drs_03_0046__en-us_topic_0135097933_note133345121551"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_03_0046__ul153719333619"><li id="drs_03_0046__li7372633561">Flow control mode takes effect only during a full migration.</li><li id="drs_03_0046__li1687520372614">After the traffic rate is modified in the incremental migration phase, the modification takes effect when the task enters the full migration phase again.</li></ul>
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<h1 class="topictitle1">Pausing a Synchronization Task</h1> <h1 class="topictitle1">Pausing a Synchronization Task</h1>
<div id="body1585882064568"><p id="drs_03_0110__p169721643104211">DRS allows you to pause real-time synchronization tasks.</p> <div id="body1585882064568"><p id="drs_03_0110__p169721643104211">DRS allows you to pause real-time synchronization tasks.</p>
<p id="drs_03_0110__p659562012449">The following tasks can be paused during incremental synchronization:</p> <p id="drs_03_0110__p659562012449">The following tasks can be paused during incremental synchronization:</p>
<ul id="drs_03_0110__ul9956177646"><li id="drs_03_0110__li205301455658">To the cloud<ul id="drs_03_0110__ul15180135311814"><li id="drs_03_0110__li1470371998">MySQL-&gt;MySQL</li><li id="drs_03_0110__li990375720106">PostgreSQL-&gt;PostgreSQL</li><li id="drs_03_0110__li144076618114">Oracle-&gt;PostgreSQL</li></ul> <ul id="drs_03_0110__ul9956177646"><li id="drs_03_0110__li205301455658">To the cloud<ul id="drs_03_0110__ul15180135311814"><li id="drs_03_0110__li1470371998">MySQL-&gt;MySQL</li><li id="drs_03_0110__li990375720106">PostgreSQL-&gt;PostgreSQL</li></ul>
</li><li id="drs_03_0110__li24531858150">From the cloud<ul id="drs_03_0110__ul20200531590"><li id="drs_03_0110__li143913992">MySQL-&gt;MySQL</li><li id="drs_03_0110__li520013391">MySQL-&gt;Kafka</li></ul> </li><li id="drs_03_0110__li24531858150">From the cloud<ul id="drs_03_0110__ul20200531590"><li id="drs_03_0110__li143913992">MySQL-&gt;MySQL</li></ul>
</li><li id="drs_03_0110__li1859212012618">Self-built -&gt; Self-built<ul id="drs_03_0110__ul429813341360"><li id="drs_03_0110__li179416331676">MySQL-&gt;Kafka</li></ul>
</li></ul> </li></ul>
<p id="drs_03_0110__p1832632712502">In addition, the following tasks can be paused during full synchronization:</p> <p id="drs_03_0110__p1832632712502">In addition, the following tasks can be paused during full synchronization:</p>
<ul id="drs_03_0110__ul122041523125110"><li id="drs_03_0110__li491613348512">MySQL-&gt;MySQL</li></ul> <ul id="drs_03_0110__ul122041523125110"><li id="drs_03_0110__li491613348512">MySQL-&gt;MySQL</li></ul>

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<a name="drs_03_043"></a><a name="drs_03_043"></a>
<h1 class="topictitle1">Checking Whether the Source Database Character Set Is Supported</h1>
<div id="body8662426"><div class="section" id="drs_03_043__en-us_topic_0000001160467810_section79874427016"><h4 class="sectiontitle">Oracle Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_03_043__en-us_topic_0000001160467810_table119871342607" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the source database character set is supported</caption><tbody><tr id="drs_03_043__en-us_topic_0000001160467810_row6986184219011"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_03_043__en-us_topic_0000001160467810_p149861342802">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.1.1 "><p id="drs_03_043__en-us_topic_0000001160467810_p109861425013">Whether the source database character set is supported</p>
</td>
</tr>
<tr id="drs_03_043__en-us_topic_0000001160467810_row298616421019"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.2.1"><p id="drs_03_043__en-us_topic_0000001160467810_p17986124219018">Description</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.2.1 "><p id="drs_03_043__en-us_topic_0000001160467810_p169861242703">If the character set of the source database is not supported, data synchronization may fail. A migration task from Oracle only supports the following character sets: ZHS16GBK, AL32UTF8, UTF8, US7ASCII, WE8MSWIN1252, and WE8ISO8859P1.</p>
</td>
</tr>
<tr id="drs_03_043__en-us_topic_0000001160467810_row15986164211011"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.3.1"><p id="drs_03_043__en-us_topic_0000001160467810_p69861242307">Failure Cause and Handling Suggestion</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_03_043__en-us_topic_0000001160467810_p198619422011">Failure cause: The source database character set is not supported.</p>
<p id="drs_03_043__en-us_topic_0000001160467810_p2986114217013">Handling suggestion: Go back to the connection test page and select a source database with supported character sets or change the character set of the source database to AL32UTF8.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_12_0008.html">Database Parameters</a></div>
</div>
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<div id="body0000001089145473"></div> <div id="body0000001089145473"></div>
<div> <div>
<ul class="ullinks"> <ul class="ullinks">
<li class="ulchildlink"><strong><a href="drs_03_0052.html">Kafka Message Format</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_05_0018.html">Kafka Authentication</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_03_1131.html">Forcibly Stopping Synchronization of GaussDB(for openGauss) Distributed</a></strong><br> <li class="ulchildlink"><strong><a href="drs_03_1131.html">Forcibly Stopping Synchronization of GaussDB(for openGauss) Distributed</a></strong><br>
</li> </li>
<li class="ulchildlink"><strong><a href="drs_12_0009.html">Forcibly Stopping Synchronization of PostgreSQL</a></strong><br> <li class="ulchildlink"><strong><a href="drs_12_0009.html">Forcibly Stopping Synchronization of PostgreSQL</a></strong><br>

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<tr id="drs_03_1117__row19827128212"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.5.3.3.2.1.2.3.1.1 "><p id="drs_03_1117__p1882715215211">SSL Connection</p> <tr id="drs_03_1117__row19827128212"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.5.3.3.2.1.2.3.1.1 "><p id="drs_03_1117__p1882715215211">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.5.3.3.2.1.2.3.1.2 "><p id="drs_03_1117__p68272021522">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.5.3.3.2.1.2.3.1.2 "><p id="drs_03_1117__p68272021522">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_03_1117__note118041213163"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_03_1117__ul266710518121"><li id="drs_03_1117__li36671451181216">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_03_1117__li1657285318124">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_03_1117__note118041213163"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_03_1117__ul266710518121"><li id="drs_03_1117__li36671451181216">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_03_1117__li1657285318124">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
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<tr id="drs_03_1117__row1697263113449"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.5.3.3.2.3.2.3.1.1 "><p id="drs_03_1117__p169721731164419">SSL Connection</p> <tr id="drs_03_1117__row1697263113449"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.5.3.3.2.3.2.3.1.1 "><p id="drs_03_1117__p169721731164419">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.5.3.3.2.3.2.3.1.2 "><p id="drs_03_1117__p59727312441">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.5.3.3.2.3.2.3.1.2 "><p id="drs_03_1117__p59727312441">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_03_1117__note20972831204411"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_03_1117__ul597215312442"><li id="drs_03_1117__li119721531144416">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_03_1117__li16972163164419">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_03_1117__note20972831204411"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_03_1117__ul597215312442"><li id="drs_03_1117__li119721531144416">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_03_1117__li16972163164419">If the SSL certificate is not used, your data may be at risk.</li></ul>
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<tr id="drs_03_1118__row7611101151711"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.5.2.3.2.1.2.3.1.1 "><p id="drs_03_1118__p10611101116178">SSL Connection</p> <tr id="drs_03_1118__row7611101151711"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.5.2.3.2.1.2.3.1.1 "><p id="drs_03_1118__p10611101116178">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.5.2.3.2.1.2.3.1.2 "><p id="drs_03_1118__p1661141171717">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.5.2.3.2.1.2.3.1.2 "><p id="drs_03_1118__p1661141171717">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_03_1118__note1611151113171"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_03_1118__ul10611111110172"><li id="drs_03_1118__li161171110178">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_03_1118__li18611191114170">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_03_1118__note1611151113171"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_03_1118__ul10611111110172"><li id="drs_03_1118__li161171110178">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_03_1118__li18611191114170">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
</tr> </tr>
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<tr id="drs_03_1118__row166170119176"><td class="cellrowborder" valign="top" width="16.1%" headers="mcps1.3.5.2.4.2.1.2.3.1.1 "><p id="drs_03_1118__p9617171110178">Start Point</p> <tr id="drs_03_1118__row166170119176"><td class="cellrowborder" valign="top" width="16.1%" headers="mcps1.3.5.2.4.2.1.2.3.1.1 "><p id="drs_03_1118__p9617171110178">Start Point</p>
</td> </td>
<td class="cellrowborder" valign="top" width="83.89999999999999%" headers="mcps1.3.5.2.4.2.1.2.3.1.2 "><p id="drs_03_1118__p86171411121715">The position where the incremental log was created based on the source log. It allows you to perform resumable data transfer.</p> <td class="cellrowborder" valign="top" width="83.89999999999999%" headers="mcps1.3.5.2.4.2.1.2.3.1.2 "><p id="drs_03_1118__p86171411121715">The position where the incremental log was created based on the source log. It allows you to perform resumable data transfer.</p>
<p id="drs_03_1118__p1618171121710">For an incremental synchronization task, the start point must be in the standard format. You can run the <strong id="drs_03_1118__b1168526960">show master status</strong> command in the source database to obtain the start point.</p> <p id="drs_03_1118__p1618171121710">For an incremental synchronization task, the start point must be in the standard format. You can run the <strong id="drs_03_1118__b749698106">show master status</strong> command in the source database to obtain the start point.</p>
<ul id="drs_03_1118__ul5618121111713"><li id="drs_03_1118__li261861111173">If GTID mode is disabled, the format of the start point is File:Position (for example, mysql-bin.014734:8937).</li><li id="drs_03_1118__li1561811117179">After the GTID is enabled, the format of the start point is File:Position; Executed_Gtid_Set (for example, mysql-bin.014734:8937;ea352a82-e9a0-11ea-b650-fa163e1e82ed:1-23377228, 8404bb4b-cc96-11ea-ae7f-fa163ead1b99:1-59684135)</li></ul> <ul id="drs_03_1118__ul5618121111713"><li id="drs_03_1118__li261861111173">If GTID mode is disabled, the format of the start point is File:Position (for example, mysql-bin.014734:8937).</li><li id="drs_03_1118__li1561811117179">After the GTID is enabled, the format of the start point is File:Position; Executed_Gtid_Set (for example, mysql-bin.014734:8937;ea352a82-e9a0-11ea-b650-fa163e1e82ed:1-23377228, 8404bb4b-cc96-11ea-ae7f-fa163ead1b99:1-59684135)</li></ul>
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</div></div> </div></div>
</td> </td>
</tr> </tr>
<tr id="drs_03_1124__row481272212"><td class="cellrowborder" valign="top" width="23.87%" headers="mcps1.3.5.3.2.2.2.2.3.1.1 "><p id="drs_03_1124__en-us_topic_0000001158043927_p65921748463">AZ</p>
</td>
<td class="cellrowborder" valign="top" width="76.13%" headers="mcps1.3.5.3.2.2.2.2.3.1.2 "><p id="drs_03_1124__en-us_topic_0000001158043927_p55924474615">This parameter is available only when you select <strong id="drs_03_1124__b96355805571515">primary/standby</strong> for <strong id="drs_03_1124__b99054139771515">Instance Type</strong>. It indicates the type of the DRS instance. If the source or destination database is in the same AZ as the DRS instance, you can get better performance.</p>
<p id="drs_03_1124__en-us_topic_0000001158043927_p38142191099">If <strong id="drs_03_1124__b30633431071515">Instance Type</strong> is set to <strong id="drs_03_1124__b17697213671515">primary/standby</strong>, you can specify <strong id="drs_03_1124__b113022915671515">Primary AZ</strong> and <strong id="drs_03_1124__b188609772671515">Standby AZ</strong>.</p>
</td>
</tr>
<tr id="drs_03_1124__row11681455143620"><td class="cellrowborder" valign="top" width="23.87%" headers="mcps1.3.5.3.2.2.2.2.3.1.1 "><p id="drs_03_1124__p1276314133599">Tags</p> <tr id="drs_03_1124__row11681455143620"><td class="cellrowborder" valign="top" width="23.87%" headers="mcps1.3.5.3.2.2.2.2.3.1.1 "><p id="drs_03_1124__p1276314133599">Tags</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.13%" headers="mcps1.3.5.3.2.2.2.2.3.1.2 "><ul id="drs_03_1124__ul18366437153711"><li id="drs_03_1124__drs_04_0102_li118251138171510">This setting is optional. Adding tags helps you better identify and manage your tasks. Each task can have up to 20 tags.</li><li id="drs_03_1124__drs_04_0102_li1382517381156">After a task is created, you can view its tag details on the <strong id="drs_03_1124__drs_04_0102_b4510183112113">Tags</strong> tab. For details, see <a href="drs_synchronization_tag.html">Tag Management</a>.</li></ul> <td class="cellrowborder" valign="top" width="76.13%" headers="mcps1.3.5.3.2.2.2.2.3.1.2 "><ul id="drs_03_1124__ul18366437153711"><li id="drs_03_1124__drs_04_0102_li118251138171510">This setting is optional. Adding tags helps you better identify and manage your tasks. Each task can have up to 20 tags.</li><li id="drs_03_1124__drs_04_0102_li1382517381156">After a task is created, you can view its tag details on the <strong id="drs_03_1124__drs_04_0102_b4510183112113">Tags</strong> tab. For details, see <a href="drs_synchronization_tag.html">Tag Management</a>.</li></ul>

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<h1 class="topictitle1">Checking Whether session_replication_role of the Destination Database Is correctly Set</h1>
<div id="body8662426"><div class="section" id="drs_03_1130__en-us_topic_0000001160149248_section115017217222"><h4 class="sectiontitle">PostgreSQL Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_03_1130__en-us_topic_0000001160149248_table18108192214474" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the session_replication_role value of the destination database is correctly set</caption><tbody><tr id="drs_03_1130__en-us_topic_0000001160149248_row19108192294711"><th class="firstcol" valign="top" width="11.06%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_03_1130__en-us_topic_0000001160149248_p191087222477">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="88.94%" headers="mcps1.3.1.2.2.3.1.1 "><p id="drs_03_1130__en-us_topic_0000001160149248_p1546615199234">Whether the <strong id="drs_03_1130__en-us_topic_0000001160149248_b14771134414512">session_replication_role</strong> value of the destination database is correctly set.</p>
</td>
</tr>
<tr id="drs_03_1130__en-us_topic_0000001160149248_row3108132254714"><th class="firstcol" valign="top" width="11.06%" id="mcps1.3.1.2.2.3.2.1"><p id="drs_03_1130__en-us_topic_0000001160149248_p1710810224473">Description</p>
</th>
<td class="cellrowborder" valign="top" width="88.94%" headers="mcps1.3.1.2.2.3.2.1 "><p id="drs_03_1130__en-us_topic_0000001160149248_p15372705185323">The <span class="parmname" id="drs_03_1130__parmname64831074812"><b>session_replication_role</b></span> parameter of the destination database is not set to <strong id="drs_03_1130__en-us_topic_0000001160149248_b1562502913453">replica</strong>. Data synchronization may fail when the synchronized table has associated foreign key constraints or triggers.</p>
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<tr id="drs_03_1130__en-us_topic_0000001160149248_row212432224711"><th class="firstcol" valign="top" width="11.06%" id="mcps1.3.1.2.2.3.3.1"><p id="drs_03_1130__en-us_topic_0000001160149248_p1412462211472">Item to Be Confirmed and Handling Suggestion</p>
</th>
<td class="cellrowborder" valign="top" width="88.94%" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_03_1130__en-us_topic_0000001160149248_p11557124313013">Item to be confirmed: The <span class="parmname" id="drs_03_1130__parmname1192118135815"><b>session_replication_role</b></span> parameter of the destination database is not set to <strong id="drs_03_1130__en-us_topic_0000001160149248_b107181140445">replica</strong>.</p>
<p id="drs_03_1130__en-us_topic_0000001160149248_p355811437010">Handling suggestion: Before starting the synchronization task, set <span class="parmname" id="drs_03_1130__parmname382515221488"><b>session_replication_role</b></span> of the destination database to <strong id="drs_03_1130__b811241511412">replica</strong>. After the synchronization is complete, change the value of this parameter to <strong id="drs_03_1130__b1960192314148">origin</strong>. If the destination database is an RDS instance, you can modify the parameter on the RDS console.</p>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_12_0008.html">Database Parameters</a></div>
</div>
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<li class="ulchildlink"><strong><a href="drs_16_1124.html">Can Online DDL Tools Be Used for Real-time Synchronization?</a></strong><br> <li class="ulchildlink"><strong><a href="drs_16_1124.html">Can Online DDL Tools Be Used for Real-time Synchronization?</a></strong><br>
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<li class="ulchildlink"><strong><a href="drs_16_1151.html">Why Do I Use the SCAN IP Address to Connect to an Oracle RAC Cluster?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_16_1155.html">How Do I Check Supplemental Logging of the Source Oracle Database?</a></strong><br>
</li>
</ul> </ul>
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<p id="drs_04_0034__en-us_topic_0000001205627867_p1988914541285">Full+incremental migration:</p> <p id="drs_04_0034__en-us_topic_0000001205627867_p1988914541285">Full+incremental migration:</p>
<p id="drs_04_0034__en-us_topic_0000001205627867_p1088913541989">SELECT, SHOW VIEW, EVENT, LOCK TABLES, REPLICATION SLAVE, and REPLICATION CLIENT</p> <p id="drs_04_0034__en-us_topic_0000001205627867_p1088913541989">SELECT, SHOW VIEW, EVENT, LOCK TABLES, REPLICATION SLAVE, and REPLICATION CLIENT</p>
<ul id="drs_04_0034__en-us_topic_0000001205627867_ul327172591218"><li id="drs_04_0034__en-us_topic_0000001205627867_li10398175451210">REPLICATION SLAVE and REPLICATION CLIENT are global permissions and must be enabled separately. The reference statement is as follows:<p id="drs_04_0034__en-us_topic_0000001205627867_p2606555171212"><a name="drs_04_0034__en-us_topic_0000001205627867_li10398175451210"></a><a name="en-us_topic_0000001205627867_li10398175451210"></a><strong id="drs_04_0034__en-us_topic_0000001205627867_b185962019456">GRANT</strong> REPLICATION SLAVE, REPLICATION CLIENT <strong id="drs_04_0034__en-us_topic_0000001205627867_b3721346455">ON</strong> *.* <strong id="drs_04_0034__en-us_topic_0000001205627867_b1830814615457">TO</strong> 'user1';</p> <ul id="drs_04_0034__en-us_topic_0000001205627867_ul327172591218"><li id="drs_04_0034__en-us_topic_0000001205627867_li10398175451210">REPLICATION SLAVE and REPLICATION CLIENT are global permissions and must be enabled separately. The reference statement is as follows:<p id="drs_04_0034__en-us_topic_0000001205627867_p2606555171212"><a name="drs_04_0034__en-us_topic_0000001205627867_li10398175451210"></a><a name="en-us_topic_0000001205627867_li10398175451210"></a><strong id="drs_04_0034__en-us_topic_0000001205627867_b185962019456">GRANT</strong> REPLICATION SLAVE, REPLICATION CLIENT <strong id="drs_04_0034__en-us_topic_0000001205627867_b3721346455">ON</strong> *.* <strong id="drs_04_0034__en-us_topic_0000001205627867_b1830814615457">TO</strong> 'user1';</p>
</li><li id="drs_04_0034__en-us_topic_0000001205627867_li841692851212">SELECT, SHOW VIEW, EVENT, and LOCK TABLES are non-global permissions. The reference statement is as follows:<p id="drs_04_0034__en-us_topic_0000001205627867_p17656615101311"><a name="drs_04_0034__en-us_topic_0000001205627867_li841692851212"></a><a name="en-us_topic_0000001205627867_li841692851212"></a><strong id="drs_04_0034__en-us_topic_0000001205627867_b13712165819443">GRANT</strong> SELECT, SHOW VIEW, EVENT, LOCK TABLES <strong id="drs_04_0034__en-us_topic_0000001205627867_b0564952144415">ON</strong> [Database to be migrated].* <strong id="drs_04_0034__en-us_topic_0000001205627867_b81451255184418">TO</strong> 'user1';</p> </li><li id="drs_04_0034__en-us_topic_0000001205627867_li841692851212">SELECT, SHOW VIEW, EVENT, and LOCK TABLES are non-global permissions. The reference statement is as follows:<p id="drs_04_0034__en-us_topic_0000001205627867_p17656615101311"><a name="drs_04_0034__en-us_topic_0000001205627867_li841692851212"></a><a name="en-us_topic_0000001205627867_li841692851212"></a><strong id="drs_04_0034__en-us_topic_0000001205627867_b13712165819443">GRANT</strong> SELECT, SHOW VIEW, EVENT, LOCK TABLES, <strong id="drs_04_0034__en-us_topic_0000001205627867_b0564952144415">ON</strong> [Database to be migrated].* <strong id="drs_04_0034__en-us_topic_0000001205627867_b81451255184418">TO</strong> 'user1';</p>
</li></ul> </li></ul>
</td> </td>
<td class="cellrowborder" valign="top" width="48.4048404840484%" headers="mcps1.3.2.2.2.2.2.4.1.3 "><p id="drs_04_0034__en-us_topic_0000001205627867_p228318401793">Full migration:</p> <td class="cellrowborder" valign="top" width="48.4048404840484%" headers="mcps1.3.2.2.2.2.2.4.1.3 "><p id="drs_04_0034__en-us_topic_0000001205627867_p228318401793">Full migration:</p>
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<p id="drs_04_0034__en-us_topic_0000001205627867_p17582555141815">Reference statement: <strong id="drs_04_0034__en-us_topic_0000001205627867_b255681324813">GRANT</strong> SELECT, CREATE, ALTER, DROP, DELETE, INSERT, UPDATE, INDEX, EVENT, CREATE VIEW, CREATE ROUTINE, TRIGGER <strong id="drs_04_0034__en-us_topic_0000001205627867_b17992004820">ON</strong> *.* <strong id="drs_04_0034__en-us_topic_0000001205627867_b149912415483">TO</strong> 'user1' <strong id="drs_04_0034__en-us_topic_0000001205627867_b121861130134813">WITH GRANT OPTION</strong>;</p> <p id="drs_04_0034__en-us_topic_0000001205627867_p17582555141815">Reference statement: <strong id="drs_04_0034__en-us_topic_0000001205627867_b255681324813">GRANT</strong> SELECT, CREATE, ALTER, DROP, DELETE, INSERT, UPDATE, INDEX, EVENT, CREATE VIEW, CREATE ROUTINE, TRIGGER <strong id="drs_04_0034__en-us_topic_0000001205627867_b17992004820">ON</strong> *.* <strong id="drs_04_0034__en-us_topic_0000001205627867_b149912415483">TO</strong> 'user1' <strong id="drs_04_0034__en-us_topic_0000001205627867_b121861130134813">WITH GRANT OPTION</strong>;</p>
<p id="drs_04_0034__en-us_topic_0000001205627867_p12284240398">Full+incremental migration:</p> <p id="drs_04_0034__en-us_topic_0000001205627867_p12284240398">Full+incremental migration:</p>
<p id="drs_04_0034__en-us_topic_0000001205627867_p1228410401916">SELECT, CREATE, ALTER, DROP, DELETE, INSERT, UPDATE, INDEX, EVENT, CREATE VIEW, CREATE ROUTINE, TRIGGER, REFERENCES, and WITH GRANT OPTION. If the destination database version is in the range 8.0.14 to 8.0.18, the SESSION_VARIABLES_ADMIN permission is required.</p> <p id="drs_04_0034__en-us_topic_0000001205627867_p1228410401916">SELECT, CREATE, ALTER, DROP, DELETE, INSERT, UPDATE, INDEX, EVENT, CREATE VIEW, CREATE ROUTINE, TRIGGER, REFERENCES, and WITH GRANT OPTION. If the destination database version is in the range 8.0.14 to 8.0.18, the SESSION_VARIABLES_ADMIN permission is required.</p>
<p id="drs_04_0034__en-us_topic_0000001205627867_p6549101711911">Reference statement: <strong id="drs_04_0034__en-us_topic_0000001205627867_b119333234714">GRANT</strong> SELECT, CREATE, ALTER, DROP, DELETE, INSERT, UPDATE, INDEX, EVENT, CREATE VIEW, CREATE ROUTINE, TRIGGER, REFERENCES <strong id="drs_04_0034__en-us_topic_0000001205627867_b55043612474">ON</strong> [<em id="drs_04_0034__en-us_topic_0000001205627867_i1987203962011">Databases to be migrated</em>].* <strong id="drs_04_0034__en-us_topic_0000001205627867_b9206743184713">TO</strong> 'user1' <strong id="drs_04_0034__en-us_topic_0000001205627867_b5632164919476">WITH GRANT OPTION</strong>;</p> <p id="drs_04_0034__en-us_topic_0000001205627867_p6549101711911">Reference statement: <strong id="drs_04_0034__en-us_topic_0000001205627867_b119333234714">GRANT</strong>SELECT, CREATE, ALTER, DROP, DELETE, INSERT, UPDATE, INDEX, EVENT, CREATE VIEW, CREATE ROUTINE, TRIGGER, REFERENCES <strong id="drs_04_0034__en-us_topic_0000001205627867_b55043612474">ON</strong> [<em id="drs_04_0034__en-us_topic_0000001205627867_i1987203962011">Databases to be migrated</em>].* <strong id="drs_04_0034__en-us_topic_0000001205627867_b9206743184713">TO</strong> 'user1' <strong id="drs_04_0034__en-us_topic_0000001205627867_b5632164919476">WITH GRANT OPTION</strong>;</p>
</td> </td>
</tr> </tr>
<tr id="drs_04_0034__en-us_topic_0000001205627867_row29152011871"><td class="cellrowborder" valign="top" width="9.53095309530953%" headers="mcps1.3.2.2.2.2.2.4.1.1 "><p id="drs_04_0034__en-us_topic_0000001205627867_p391531878">Real-time synchronization</p> <tr id="drs_04_0034__en-us_topic_0000001205627867_row29152011871"><td class="cellrowborder" valign="top" width="9.53095309530953%" headers="mcps1.3.2.2.2.2.2.4.1.1 "><p id="drs_04_0034__en-us_topic_0000001205627867_p391531878">Real-time synchronization</p>
</td> </td>
<td class="cellrowborder" valign="top" width="42.06420642064206%" headers="mcps1.3.2.2.2.2.2.4.1.2 "><p id="drs_04_0034__en-us_topic_0000001205627867_p12915011714">SELECT, SHOW VIEW, EVENT, LOCK TABLES, REPLICATION SLAVE, and REPLICATION CLIENT</p> <td class="cellrowborder" valign="top" width="42.06420642064206%" headers="mcps1.3.2.2.2.2.2.4.1.2 "><p id="drs_04_0034__en-us_topic_0000001205627867_p12915011714">SELECT, SHOW VIEW, EVENT, LOCK TABLES, REPLICATION SLAVE, and REPLICATION CLIENT</p>
<ul id="drs_04_0034__en-us_topic_0000001205627867_ul18326201910346"><li id="drs_04_0034__en-us_topic_0000001205627867_li232681943418">REPLICATION SLAVE and REPLICATION CLIENT are global permissions and must be enabled separately. The reference statement is as follows:<p id="drs_04_0034__en-us_topic_0000001205627867_p133271419143417"><a name="drs_04_0034__en-us_topic_0000001205627867_li232681943418"></a><a name="en-us_topic_0000001205627867_li232681943418"></a><strong id="drs_04_0034__en-us_topic_0000001205627867_b13937123719446">GRANT</strong> REPLICATION SLAVE, REPLICATION CLIENT <strong id="drs_04_0034__en-us_topic_0000001205627867_b316844019441">ON</strong> *.* <strong id="drs_04_0034__en-us_topic_0000001205627867_b1540144214448">TO</strong> 'user1';</p> <ul id="drs_04_0034__en-us_topic_0000001205627867_ul18326201910346"><li id="drs_04_0034__en-us_topic_0000001205627867_li232681943418">REPLICATION SLAVE and REPLICATION CLIENT are global permissions and must be enabled separately. The reference statement is as follows:<p id="drs_04_0034__en-us_topic_0000001205627867_p133271419143417"><a name="drs_04_0034__en-us_topic_0000001205627867_li232681943418"></a><a name="en-us_topic_0000001205627867_li232681943418"></a><strong id="drs_04_0034__en-us_topic_0000001205627867_b13937123719446">GRANT</strong> REPLICATION SLAVE, REPLICATION CLIENT <strong id="drs_04_0034__en-us_topic_0000001205627867_b316844019441">ON</strong> *.* <strong id="drs_04_0034__en-us_topic_0000001205627867_b1540144214448">TO</strong> 'user1';</p>
</li><li id="drs_04_0034__en-us_topic_0000001205627867_li2032791914347">SELECT, SHOW VIEW, EVENT, and LOCK TABLES are non-global permissions. The reference statement is as follows:<p id="drs_04_0034__en-us_topic_0000001205627867_p332711920342"><a name="drs_04_0034__en-us_topic_0000001205627867_li2032791914347"></a><a name="en-us_topic_0000001205627867_li2032791914347"></a><strong id="drs_04_0034__en-us_topic_0000001205627867_b179982094313">GRANT</strong> SELECT, SHOW VIEW, EVENT, LOCK TABLES <strong id="drs_04_0034__en-us_topic_0000001205627867_b129981892033">ON</strong> [Database to be synchronized].* <strong id="drs_04_0034__en-us_topic_0000001205627867_b5999892038">TO</strong> 'user1';</p> </li><li id="drs_04_0034__en-us_topic_0000001205627867_li2032791914347">SELECT, SHOW VIEW, EVENT, and LOCK TABLES are non-global permissions. The reference statement is as follows:<p id="drs_04_0034__en-us_topic_0000001205627867_p332711920342"><a name="drs_04_0034__en-us_topic_0000001205627867_li2032791914347"></a><a name="en-us_topic_0000001205627867_li2032791914347"></a><strong id="drs_04_0034__en-us_topic_0000001205627867_b179982094313">GRANT</strong> SELECT, SHOW VIEW, EVENT, LOCK TABLES, <strong id="drs_04_0034__en-us_topic_0000001205627867_b129981892033">ON</strong> [Database to be synchronized].* <strong id="drs_04_0034__en-us_topic_0000001205627867_b5999892038">TO</strong> 'user1';</p>
</li></ul> </li></ul>
</td> </td>
<td class="cellrowborder" valign="top" width="48.4048404840484%" headers="mcps1.3.2.2.2.2.2.4.1.3 "><p id="drs_04_0034__en-us_topic_0000001205627867_p1328320580107">The root account of RDS for MySQL has the following permissions by default: SELECT, CREATE, DROP, DELETE, INSERT, UPDATE, ALTER, CREATE VIEW, CREATE ROUTINE, and REFERENCES If the destination database version is in the range 8.0.14 to 8.0.18, the SESSION_VARIABLES_ADMIN permission is required.</p> <td class="cellrowborder" valign="top" width="48.4048404840484%" headers="mcps1.3.2.2.2.2.2.4.1.3 "><p id="drs_04_0034__en-us_topic_0000001205627867_p1328320580107">The root account of RDS for MySQL has the following permissions by default: SELECT, CREATE, DROP, DELETE, INSERT, UPDATE, ALTER, CREATE VIEW, CREATE ROUTINE, and REFERENCES If the destination database version is in the range 8.0.14 to 8.0.18, the SESSION_VARIABLES_ADMIN permission is required.</p>

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<tr id="drs_04_0088__row19827128212"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.7.3.3.2.2.1.1.2.3.1.1 "><p id="drs_04_0088__p1882715215211">SSL Connection</p> <tr id="drs_04_0088__row19827128212"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.7.3.3.2.2.1.1.2.3.1.1 "><p id="drs_04_0088__p1882715215211">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.7.3.3.2.2.1.1.2.3.1.2 "><p id="drs_04_0088__p68272021522">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.7.3.3.2.2.1.1.2.3.1.2 "><p id="drs_04_0088__p68272021522">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_04_0088__note118041213163"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0088__ul266710518121"><li id="drs_04_0088__li36671451181216">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0088__li1657285318124">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_04_0088__note118041213163"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0088__ul266710518121"><li id="drs_04_0088__li36671451181216">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0088__li1657285318124">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
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<tr id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_row2592193212194"><td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.7.3.4.2.1.2.3.1.1 "><p id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_p7592232201911">Migrate Account</p> <tr id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_row2592193212194"><td class="cellrowborder" valign="top" width="25%" headers="mcps1.3.7.3.4.2.1.2.3.1.1 "><p id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_p7592232201911">Migrate Account</p>
</td> </td>
<td class="cellrowborder" valign="top" width="75%" headers="mcps1.3.7.3.4.2.1.2.3.1.2 "><p id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_p11670239171013">During a database migration, accounts need to be migrated separately.</p> <td class="cellrowborder" valign="top" width="75%" headers="mcps1.3.7.3.4.2.1.2.3.1.2 "><p id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_p11670239171013">During a database migration, accounts need to be migrated separately.</p>
<div class="p" id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_p106411111205412">There are accounts that can be migrated completely, accounts whose permissions need to be reduced, and accounts that cannot be migrated. You can choose whether to migrate the accounts based on service requirements. If you select <span class="uicontrol" id="drs_04_0088__en-us_topic_0135097933_uicontrol1845534122119"><b>Yes</b></span>, you can select the accounts to be migrated as required.<ul id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_ul52489455107"><li id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_li52487450107"><strong id="drs_04_0088__b1182679">Yes</strong><p id="drs_04_0088__en-us_topic_0135097933_p10236114416406">If you need to migrate accounts, see <a href="drs_09_0017.html">Migrating Accounts</a>.</p> <div class="p" id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_p106411111205412">There are accounts that can be migrated completely, accounts whose permissions need to be reduced, and accounts that cannot be migrated. You can choose whether to migrate the accounts based on service requirements. If you select <span class="uicontrol" id="drs_04_0088__en-us_topic_0135097933_uicontrol1845534122119"><b>Yes</b></span>, you can select the accounts to be migrated as required.<ul id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_ul52489455107"><li id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_li52487450107"><strong id="drs_04_0088__b816160519">Yes</strong><p id="drs_04_0088__en-us_topic_0135097933_p10236114416406">If you need to migrate accounts, see <a href="drs_09_0017.html">Migrating Accounts</a>.</p>
</li></ul> </li></ul>
</div> </div>
<ul id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_ul17378301111"><li id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_li07371535115"><strong id="drs_04_0088__b532696104">No</strong><p id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_p794655681211">During migration, accounts, permissions, and passwords are not migrated.</p> <ul id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_ul17378301111"><li id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_li07371535115"><strong id="drs_04_0088__b310462314">No</strong><p id="drs_04_0088__en-us_topic_0135097933_en-us_topic_0078078071_p794655681211">During migration, accounts, permissions, and passwords are not migrated.</p>
</li></ul> </li></ul>
</td> </td>
</tr> </tr>

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<tr id="drs_04_0095__row123367521676"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.7.3.3.2.1.1.1.2.3.1.1 "><p id="drs_04_0095__p1933610528713">SSL Connection</p> <tr id="drs_04_0095__row123367521676"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.7.3.3.2.1.1.1.2.3.1.1 "><p id="drs_04_0095__p1933610528713">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.7.3.3.2.1.1.1.2.3.1.2 "><p id="drs_04_0095__p203361052676">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.7.3.3.2.1.1.1.2.3.1.2 "><p id="drs_04_0095__p203361052676">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_04_0095__note1033612522077"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0095__ul533616521376"><li id="drs_04_0095__li103367527711">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0095__li1533665210716">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_04_0095__note1033612522077"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0095__ul533616521376"><li id="drs_04_0095__li103367527711">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0095__li1533665210716">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
</tr> </tr>

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</tr> </tr>
<tr id="drs_04_0100__row134451814141212"><td class="cellrowborder" valign="top" width="23.87%" headers="mcps1.3.6.3.2.2.1.2.1.2.3.1.1 "><p id="drs_04_0100__p15445314141213">Destination DB Engine</p> <tr id="drs_04_0100__row134451814141212"><td class="cellrowborder" valign="top" width="23.87%" headers="mcps1.3.6.3.2.2.1.2.1.2.3.1.1 "><p id="drs_04_0100__p15445314141213">Destination DB Engine</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.13%" headers="mcps1.3.6.3.2.2.1.2.1.2.3.1.2 "><p id="drs_04_0100__p1445201421211">Select <strong id="drs_04_0100__b55002655">MySQL</strong>.</p> <td class="cellrowborder" valign="top" width="76.13%" headers="mcps1.3.6.3.2.2.1.2.1.2.3.1.2 "><p id="drs_04_0100__p1445201421211">Select <strong id="drs_04_0100__b977693758">MySQL</strong>.</p>
</td> </td>
</tr> </tr>
<tr id="drs_04_0100__row15445181415124"><td class="cellrowborder" valign="top" width="23.87%" headers="mcps1.3.6.3.2.2.1.2.1.2.3.1.1 "><p id="drs_04_0100__p444571481213">Network Type</p> <tr id="drs_04_0100__row15445181415124"><td class="cellrowborder" valign="top" width="23.87%" headers="mcps1.3.6.3.2.2.1.2.1.2.3.1.1 "><p id="drs_04_0100__p444571481213">Network Type</p>
@ -258,7 +258,7 @@
<tr id="drs_04_0100__row8901105010294"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.6.3.3.2.3.2.3.1.1 "><p id="drs_04_0100__p190145082911">SSL Connection</p> <tr id="drs_04_0100__row8901105010294"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.6.3.3.2.3.2.3.1.1 "><p id="drs_04_0100__p190145082911">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.6.3.3.2.3.2.3.1.2 "><p id="drs_04_0100__p1790120506297">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.6.3.3.2.3.2.3.1.2 "><p id="drs_04_0100__p1790120506297">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_04_0100__note20901150112914"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0100__ul6901750142918"><li id="drs_04_0100__li1090105018290">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0100__li99012501296">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_04_0100__note20901150112914"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0100__ul6901750142918"><li id="drs_04_0100__li1090105018290">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0100__li99012501296">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
</tr> </tr>

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<tr id="drs_04_0101__row19827128212"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.7.3.3.2.3.2.3.1.1 "><p id="drs_04_0101__p1882715215211">SSL Connection</p> <tr id="drs_04_0101__row19827128212"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.7.3.3.2.3.2.3.1.1 "><p id="drs_04_0101__p1882715215211">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.7.3.3.2.3.2.3.1.2 "><p id="drs_04_0101__p68272021522">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.7.3.3.2.3.2.3.1.2 "><p id="drs_04_0101__p68272021522">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_04_0101__note14630114741717"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0101__ul7406173631314"><li id="drs_04_0101__li740673671315">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0101__li3391133821316">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_04_0101__note14630114741717"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0101__ul7406173631314"><li id="drs_04_0101__li740673671315">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0101__li3391133821316">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
</tr> </tr>

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@ -206,7 +206,7 @@
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.5.3.3.2.1.1.1.1.2.3.1.2 "><p id="drs_04_0102__p871913489220">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.5.3.3.2.1.1.1.1.2.3.1.2 "><p id="drs_04_0102__p871913489220">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<p id="drs_04_0102__p187722253110">This parameter is unavailable when the network type is VPC network and the database type is RDS DB instance.</p> <p id="drs_04_0102__p187722253110">This parameter is unavailable when the network type is VPC network and the database type is RDS DB instance.</p>
<div class="note" id="drs_04_0102__note197191548172216"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0102__ul17719548112214"><li id="drs_04_0102__li1971911481221">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0102__li10719104832218">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_04_0102__note197191548172216"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0102__ul17719548112214"><li id="drs_04_0102__li1971911481221">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0102__li10719104832218">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
</tr> </tr>

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@ -184,7 +184,7 @@
<tr id="drs_04_0104__row161801553161810"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.6.3.2.1.2.3.1.1 "><p id="drs_04_0104__p118045361819">SSL Connection</p> <tr id="drs_04_0104__row161801553161810"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.6.3.2.1.2.3.1.1 "><p id="drs_04_0104__p118045361819">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.6.3.2.1.2.3.1.2 "><p id="drs_04_0104__p718095319187">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.6.3.2.1.2.3.1.2 "><p id="drs_04_0104__p718095319187">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_04_0104__note1318016536186"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0104__ul131801653191816"><li id="drs_04_0104__li1318015361813">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0104__li15180253101815">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_04_0104__note1318016536186"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0104__ul131801653191816"><li id="drs_04_0104__li1318015361813">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0104__li15180253101815">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
</tr> </tr>

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docs/drs/umn/drs_04_0107.html
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@ -281,7 +281,7 @@
<tr id="drs_04_0107__row19827128212"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.7.3.3.2.4.1.1.2.3.1.1 "><p id="drs_04_0107__p1882715215211">SSL Connection</p> <tr id="drs_04_0107__row19827128212"><td class="cellrowborder" valign="top" width="23.29%" headers="mcps1.3.7.3.3.2.4.1.1.2.3.1.1 "><p id="drs_04_0107__p1882715215211">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.7.3.3.2.4.1.1.2.3.1.2 "><p id="drs_04_0107__p68272021522">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.7.3.3.2.4.1.1.2.3.1.2 "><p id="drs_04_0107__p68272021522">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_04_0107__note118041213163"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0107__ul266710518121"><li id="drs_04_0107__li36671451181216">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0107__li1657285318124">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_04_0107__note118041213163"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0107__ul266710518121"><li id="drs_04_0107__li36671451181216">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0107__li1657285318124">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
</tr> </tr>

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</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.5.3.3.2.1.2.1.1.2.3.1.2 "><p id="drs_04_0117__p871913489220">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.5.3.3.2.1.2.1.1.2.3.1.2 "><p id="drs_04_0117__p871913489220">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<p id="drs_04_0117__p187722253110">This parameter is unavailable when the network type is VPC network and the database type is RDS DB instance.</p> <p id="drs_04_0117__p187722253110">This parameter is unavailable when the network type is VPC network and the database type is RDS DB instance.</p>
<div class="note" id="drs_04_0117__note197191548172216"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0117__ul17719548112214"><li id="drs_04_0117__li1971911481221">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0117__li10719104832218">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_04_0117__note197191548172216"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0117__ul17719548112214"><li id="drs_04_0117__li1971911481221">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0117__li10719104832218">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
</tr> </tr>

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<tr id="drs_04_0121__row121441622152219"><td class="cellrowborder" valign="top" width="23%" headers="mcps1.3.7.2.3.2.5.2.3.1.1 "><p id="drs_04_0121__p118045361819">SSL Connection</p> <tr id="drs_04_0121__row121441622152219"><td class="cellrowborder" valign="top" width="23%" headers="mcps1.3.7.2.3.2.5.2.3.1.1 "><p id="drs_04_0121__p118045361819">SSL Connection</p>
</td> </td>
<td class="cellrowborder" valign="top" width="77%" headers="mcps1.3.7.2.3.2.5.2.3.1.2 "><p id="drs_04_0121__p718095319187">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="77%" headers="mcps1.3.7.2.3.2.5.2.3.1.2 "><p id="drs_04_0121__p718095319187">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<div class="note" id="drs_04_0121__note1318016536186"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0121__ul131801653191816"><li id="drs_04_0121__li1318015361813">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0121__li15180253101815">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_04_0121__note1318016536186"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0121__ul131801653191816"><li id="drs_04_0121__li1318015361813">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_04_0121__li15180253101815">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
</tr> </tr>

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<ul class="ullinks"> <ul class="ullinks">
<li class="ulchildlink"><strong><a href="drs_04_0117.html">From MySQL to MySQL</a></strong><br> <li class="ulchildlink"><strong><a href="drs_04_0117.html">From MySQL to MySQL</a></strong><br>
</li> </li>
<li class="ulchildlink"><strong><a href="drs_04_0118.html">From MySQL to Kafka</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_04_0121.html">From GaussDB(for openGauss) Distributed to MySQL</a></strong><br> <li class="ulchildlink"><strong><a href="drs_04_0121.html">From GaussDB(for openGauss) Distributed to MySQL</a></strong><br>
</li> </li>
</ul> </ul>

2
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<ul class="ullinks"> <ul class="ullinks">
<li class="ulchildlink"><strong><a href="drs_03_1118.html">From MySQL to MySQL</a></strong><br> <li class="ulchildlink"><strong><a href="drs_03_1118.html">From MySQL to MySQL</a></strong><br>
</li> </li>
<li class="ulchildlink"><strong><a href="drs_04_0128.html">From MySQL to Kafka</a></strong><br>
</li>
</ul> </ul>
<div class="familylinks"> <div class="familylinks">

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<a name="drs_05_0018"></a><a name="drs_05_0018"></a>
<h1 class="topictitle1">Kafka Authentication</h1>
<div id="body0000001224125028"><div class="section" id="drs_05_0018__section42450379218"><h4 class="sectiontitle">PLAINTEXT</h4><p id="drs_05_0018__p299315543169">No security authentication mode is available. You only need to enter the IP address and port for connection.</p>
<div class="fignone" id="drs_05_0018__fig1913418271147"><span class="figcap"><b>Figure 1 </b>PLAINTEXT</span><br><span><img id="drs_05_0018__image125314309341" src="en-us_image_0000001341094612.png"></span></div>
</div>
<div class="section" id="drs_05_0018__section14347513434"><a name="drs_05_0018__section14347513434"></a><a name="section14347513434"></a><h4 class="sectiontitle">SASL_PLAINTEXT</h4><p id="drs_05_0018__p18620421121414">The SASL mechanism is used to connect to Kafka, and you need to configure SASL parameters.</p>
<div class="fignone" id="drs_05_0018__fig1031719281296"><span class="figcap"><b>Figure 2 </b>SASL_PLAINTEXT</span><br><span><img id="drs_05_0018__image9497195073519" src="en-us_image_0000001341574152.png"></span></div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_05_0018__table8940103332711" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Parameter settings</caption><thead align="left"><tr id="drs_05_0018__row4941033172711"><th align="left" class="cellrowborder" valign="top" width="30%" id="mcps1.3.2.4.2.3.1.1"><p id="drs_05_0018__p2872185914232">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="70%" id="mcps1.3.2.4.2.3.1.2"><p id="drs_05_0018__p1787217596238">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="drs_05_0018__row19941193310273"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.2.4.2.3.1.1 "><p id="drs_05_0018__p994173362720">SASL Mechanisms </p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.2.4.2.3.1.2 "><p id="drs_05_0018__p96995012435">SASL is used by client. The following four items are supported. Kafka server uses the GSSAPI mechanism by default.</p>
<ul id="drs_05_0018__ul18773833203518"><li id="drs_05_0018__li17773103313354">GSSAPI</li><li id="drs_05_0018__li8773183303512">PLAIN</li><li id="drs_05_0018__li1217210125367">SCRAM-SHA-256</li><li id="drs_05_0018__li1226333514361">SCRAM-SHA-512</li></ul>
</td>
</tr>
<tr id="drs_05_0018__row184791551143412"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.2.4.2.3.1.1 "><p id="drs_05_0018__p1747913516347">Token Delegation</p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.2.4.2.3.1.2 "><p id="drs_05_0018__p7479951163411">Whether an agency token is used for authentication. This option is available when <strong id="drs_05_0018__b1746519172211">SCRAM-SHA-256</strong> or <strong id="drs_05_0018__b618771315226">SCRAM-SHA-512</strong> is selected for <strong id="drs_05_0018__b163841512214">SASL Mechanisms</strong>.</p>
</td>
</tr>
<tr id="drs_05_0018__row9941123332710"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.2.4.2.3.1.1 "><p id="drs_05_0018__p199411433182711">Username</p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.2.4.2.3.1.2 "><p id="drs_05_0018__p17941133318272">Username for logging in to the database</p>
</td>
</tr>
<tr id="drs_05_0018__row1031364715348"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.2.4.2.3.1.1 "><p id="drs_05_0018__p10314104717348">Password</p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.2.4.2.3.1.2 "><p id="drs_05_0018__p53141647143411">Password for the username</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="drs_05_0018__section83072273310"><a name="drs_05_0018__section83072273310"></a><a name="section83072273310"></a><h4 class="sectiontitle">SSL</h4><p id="drs_05_0018__p1191727191712">SSL is used to encrypt the connection to Kafka. Related parameters need to be configured.</p>
<div class="fignone" id="drs_05_0018__fig6889181211715"><span class="figcap"><b>Figure 3 </b>SSL</span><br><span><img id="drs_05_0018__image1997114523717" src="en-us_image_0000001391774053.png"></span></div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_05_0018__table231424184816" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Parameter settings</caption><thead align="left"><tr id="drs_05_0018__row23112414818"><th align="left" class="cellrowborder" valign="top" width="30%" id="mcps1.3.3.4.2.3.1.1"><p id="drs_05_0018__p153122411486">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="70%" id="mcps1.3.3.4.2.3.1.2"><p id="drs_05_0018__p18342417483">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="drs_05_0018__row2322414481"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.3.4.2.3.1.1 "><p id="drs_05_0018__p48421226490">Truststore Certificate</p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.3.4.2.3.1.2 "><p id="drs_05_0018__p48420254919">SSL certificate with the file name extension .jks.</p>
</td>
</tr>
<tr id="drs_05_0018__row94824154816"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.3.4.2.3.1.1 "><p id="drs_05_0018__p136014136492">Truststore Certificate Password</p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.3.4.2.3.1.2 "><p id="drs_05_0018__p18601101318498">Password of the certificate</p>
</td>
</tr>
<tr id="drs_05_0018__row1245246483"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.3.4.2.3.1.1 "><p id="drs_05_0018__p134152416489">Endpoint Identification Algorithm</p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.3.4.2.3.1.2 "><p id="drs_05_0018__p94182412482">Endpoint identification algorithm for verifying the host name of the server using the server certificate. This parameter is optional. If this parameter is left blank, host name verification is disabled.</p>
</td>
</tr>
<tr id="drs_05_0018__row1462454816"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.3.4.2.3.1.1 "><p id="drs_05_0018__p1228443720492">Mutual SSL Authentication</p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.3.4.2.3.1.2 "><p id="drs_05_0018__p1128411371494">Mutual SSL Authentication</p>
</td>
</tr>
<tr id="drs_05_0018__row13981659195113"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.3.4.2.3.1.1 "><p id="drs_05_0018__p20982135919513">Keystore Certificate</p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.3.4.2.3.1.2 "><p id="drs_05_0018__p298235915515">If mutual SSL authentication is enabled, you need to upload the mutual SSL authentication certificate with the file name extension .jks.</p>
</td>
</tr>
<tr id="drs_05_0018__row1998235985116"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.3.4.2.3.1.1 "><p id="drs_05_0018__p18982205955119">Keystore Certificate Password</p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.3.4.2.3.1.2 "><p id="drs_05_0018__p898211596513">Password of the mutual SSL authentication certificate. This option is available if mutual SSL authentication is enabled.</p>
</td>
</tr>
<tr id="drs_05_0018__row498225905113"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.3.4.2.3.1.1 "><p id="drs_05_0018__p55801422115213">Keystore Private Key Password</p>
</td>
<td class="cellrowborder" valign="top" width="70%" headers="mcps1.3.3.4.2.3.1.2 "><p id="drs_05_0018__p1541717274717">(Optional) Password of the private key in the keystore certificate.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="drs_05_0018__section1688914413315"><h4 class="sectiontitle">SASL_SSL</h4><p id="drs_05_0018__p1886110498147">If the SASL and SSL are used, configure SSL and SASL parameters. For details, see <a href="#drs_05_0018__section14347513434">SASL_PLAINTEXT</a> and <a href="#drs_05_0018__section83072273310">SSL</a>.</p>
<div class="fignone" id="drs_05_0018__fig1121644391815"><span class="figcap"><b>Figure 4 </b>SASL_SSL</span><br><span><img id="drs_05_0018__image14643184633910" src="en-us_image_0000001391854189.png"></span></div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_03_1113.html">Operation Reference in Synchronization Scenarios</a></div>
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</li> </li>
<li class="ulchildlink"><strong><a href="drs_04_0107.html">From PostgreSQL to PostgreSQL</a></strong><br> <li class="ulchildlink"><strong><a href="drs_04_0107.html">From PostgreSQL to PostgreSQL</a></strong><br>
</li> </li>
<li class="ulchildlink"><strong><a href="drs_04_0446.html">From Oracle to PostgreSQL</a></strong><br>
</li>
</ul> </ul>
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</td> </td>
<td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.3.2.3.2.1.1.1.1.2.3.1.2 "><p id="drs_06_0005__drs_04_0102_p871913489220">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p> <td class="cellrowborder" valign="top" width="76.71%" headers="mcps1.3.3.2.3.2.1.1.1.1.2.3.1.2 "><p id="drs_06_0005__drs_04_0102_p871913489220">SSL encrypts the connections between the source and destination databases. If SSL is enabled, upload the SSL CA root certificate.</p>
<p id="drs_06_0005__drs_04_0102_p187722253110">This parameter is unavailable when the network type is VPC network and the database type is RDS DB instance.</p> <p id="drs_06_0005__drs_04_0102_p187722253110">This parameter is unavailable when the network type is VPC network and the database type is RDS DB instance.</p>
<div class="note" id="drs_06_0005__drs_04_0102_note197191548172216"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_06_0005__drs_04_0102_ul17719548112214"><li id="drs_06_0005__drs_04_0102_li1971911481221">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_06_0005__drs_04_0102_li10719104832218">If SSL is disabled, your data may be at risk.</li></ul> <div class="note" id="drs_06_0005__drs_04_0102_note197191548172216"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_06_0005__drs_04_0102_ul17719548112214"><li id="drs_06_0005__drs_04_0102_li1971911481221">The maximum size of a single certificate file that can be uploaded is 500 KB.</li><li id="drs_06_0005__drs_04_0102_li10719104832218">If the SSL certificate is not used, your data may be at risk.</li></ul>
</div></div> </div></div>
</td> </td>
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<ul class="ullinks"> <ul class="ullinks">
<li class="ulchildlink"><strong><a href="drs_01_0326.html">MySQL-&gt;GaussDB(for openGauss)</a></strong><br> <li class="ulchildlink"><strong><a href="drs_01_0326.html">MySQL-&gt;GaussDB(for openGauss)</a></strong><br>
</li> </li>
<li class="ulchildlink"><strong><a href="drs_01_0334.html">Oracle-&gt;PostgreSQL</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_01_0337.html">GaussDB(for openGauss)-&gt;MySQL</a></strong><br> <li class="ulchildlink"><strong><a href="drs_01_0337.html">GaussDB(for openGauss)-&gt;MySQL</a></strong><br>
</li> </li>
</ul> </ul>

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<p id="drs_10_0012__p844074253515">When you check data consistency, compare the number of rows first. If the number of rows are inconsistent, you can then compare the data in the table to determine the inconsistent data.</p> <p id="drs_10_0012__p844074253515">When you check data consistency, compare the number of rows first. If the number of rows are inconsistent, you can then compare the data in the table to determine the inconsistent data.</p>
</div> </div>
<div class="section" id="drs_10_0012__section1321116381596"><h4 class="sectiontitle">Constraints</h4><ul id="drs_10_0012__ul2097422141015"><li id="drs_10_0012__drs_02_0007_li116291748114018">A comparison task can be created only when the task is in the incremental phase. When a full task is complete, DRS automatically creates object-level and row comparison tasks.</li><li id="drs_10_0012__drs_02_0007_li1962904894013">If DDL operations were performed on the source database, you need to compare the objects again to ensure the accuracy of the comparison results.</li><li id="drs_10_0012__drs_02_0007_li18844449454">If data in the destination database is modified separately, the comparison results may be inconsistent.</li><li id="drs_10_0012__drs_02_0007_li1421932319422">Currently, only tables with primary keys support value comparison. For tables that do not support value comparison, you can compare rows. Therefore, you can compare data by row or value based on scenarios.</li><li id="drs_10_0012__drs_02_0007_li8629848144013">To prevent resources from being occupied for a long time, DRS limits the row comparison duration. If the row comparison duration exceeds the threshold, the row comparison task stops automatically. If the source database is a relational database, the row comparison duration is 60 minutes. If the source database is a non-relational database, for example, MongoDB, the row comparison duration is 30 minutes.</li></ul> <div class="section" id="drs_10_0012__section1321116381596"><h4 class="sectiontitle">Constraints</h4><ul id="drs_10_0012__ul2097422141015"><li id="drs_10_0012__drs_02_0007_li116291748114018">A comparison task can be created only when the task is in the incremental phase. When a full task is complete, DRS automatically creates object-level and row comparison tasks.</li><li id="drs_10_0012__drs_02_0007_li1962904894013">If DDL operations were performed on the source database, you need to compare the objects again to ensure the accuracy of the comparison results.</li><li id="drs_10_0012__drs_02_0007_li18844449454">If data in the destination database is modified separately, the comparison results may be inconsistent.</li><li id="drs_10_0012__drs_02_0007_li1421932319422">Currently, only tables with primary keys support value comparison. For tables that do not support value comparison, you can compare rows. Therefore, you can compare data by row or value based on scenarios.</li><li id="drs_10_0012__drs_02_0007_li8629848144013">To prevent resources from being occupied for a long time, DRS limits the row comparison duration. If the row comparison duration exceeds the threshold, the row comparison task stops automatically. If the source database is a relational database, the row comparison duration is 60 minutes. If the source database is a non-relational database, for example, MongoDB, the row comparison duration is 30 minutes.</li></ul>
<ul id="drs_10_0012__ul1164642418112"><li id="drs_10_0012__li152011930161110">In the many-to-one row comparison scenario, the number of rows in the table in the source database is compared with that in the aggregation table mapped to the destination database.</li></ul> <ul id="drs_10_0012__ul1164642418112"><li id="drs_10_0012__li152011930161110">In the many-to-one row comparison scenario, the number of rows in the table in the source database is compared with that in the aggregation table mapped to the destination database.</li><li id="drs_10_0012__li1620133041110">If the source is a PostgreSQL database, the index and constraint names will be changed during table mapping. As a result, the index and constraint names are inconsistent.</li></ul>
</div> </div>
<div class="section" id="drs_10_0012__section16256919193311"><h4 class="sectiontitle">Prerequisites</h4><ul id="drs_10_0012__ul18180172291616"><li id="drs_10_0012__li8766123820165">You have logged in to the DRS console.</li><li id="drs_10_0012__li1579171391314">A synchronization task has been started.</li></ul> <div class="section" id="drs_10_0012__section16256919193311"><h4 class="sectiontitle">Prerequisites</h4><ul id="drs_10_0012__ul18180172291616"><li id="drs_10_0012__li8766123820165">You have logged in to the DRS console.</li><li id="drs_10_0012__li1579171391314">A synchronization task has been started.</li></ul>
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<div id="body1562573666035"><p id="drs_10_0300__p1863751718212">During real-time synchronization, you can reset the synchronization tasks in one of the following statuses so that you do not need to configure the tasks again.</p> <div id="body1562573666035"><p id="drs_10_0300__p1863751718212">During real-time synchronization, you can reset the synchronization tasks in one of the following statuses so that you do not need to configure the tasks again.</p>
<ul id="drs_10_0300__ul36463328153030"><li id="drs_10_0300__li44578795153021">Paused</li><li id="drs_10_0300__li174485561442">Incremental synchronization failed</li></ul> <ul id="drs_10_0300__ul36463328153030"><li id="drs_10_0300__li44578795153021">Paused</li><li id="drs_10_0300__li174485561442">Incremental synchronization failed</li></ul>
<p id="drs_10_0300__p62271531201618">You can reset the following DRS tasks:</p> <p id="drs_10_0300__p62271531201618">You can reset the following DRS tasks:</p>
<ul id="drs_10_0300__ul262335914137"><li id="drs_10_0300__li205301455658">To the cloud<ul id="drs_10_0300__ul15180135311814"><li id="drs_10_0300__li1470371998">MySQL-&gt;MySQL</li><li id="drs_10_0300__li990375720106">PostgreSQL-&gt;PostgreSQL</li><li id="drs_10_0300__li144076618114">Oracle-&gt;PostgreSQL</li></ul> <ul id="drs_10_0300__ul262335914137"><li id="drs_10_0300__li205301455658">To the cloud<ul id="drs_10_0300__ul15180135311814"><li id="drs_10_0300__li1470371998">MySQL-&gt;MySQL</li><li id="drs_10_0300__li990375720106">PostgreSQL-&gt;PostgreSQL</li></ul>
</li><li id="drs_10_0300__li24531858150">From the cloud<ul id="drs_10_0300__ul20200531590"><li id="drs_10_0300__li143913992">MySQL-&gt;MySQL</li><li id="drs_10_0300__li520013391">MySQL-&gt;Kafka</li></ul> </li><li id="drs_10_0300__li24531858150">From the cloud<ul id="drs_10_0300__ul20200531590"><li id="drs_10_0300__li143913992">MySQL-&gt;MySQL</li></ul>
</li><li id="drs_10_0300__li1859212012618">Self-built -&gt; Self-built<ul id="drs_10_0300__ul429813341360"><li id="drs_10_0300__li179416331676">MySQL-&gt;Kafka</li></ul>
</li></ul> </li></ul>
<div class="note" id="drs_10_0300__note3883154685119"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_10_0300__ul12568427143816"><li id="drs_10_0300__li4974175633820">For a many-to-one synchronization task, only the parent task can be reset.</li><li id="drs_10_0300__li7569227173819">For a MySQL many-to-one synchronization task, only the subtask can be reset.</li><li id="drs_10_0300__li497412547331">Resetting a task does not clear the destination database. You can determine whether to clear the destination database based on your service requirements. After the task is reset, a full synchronization is performed again. You do not need to configure the task again.</li></ul> <div class="note" id="drs_10_0300__note3883154685119"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_10_0300__ul12568427143816"><li id="drs_10_0300__li4974175633820">For a many-to-one synchronization task, only the parent task can be reset.</li><li id="drs_10_0300__li7569227173819">For a MySQL many-to-one synchronization task, only the subtask can be reset.</li><li id="drs_10_0300__li497412547331">Resetting a task does not clear the destination database. You can determine whether to clear the destination database based on your service requirements. After the task is reset, a full synchronization is performed again. You do not need to configure the task again.</li></ul>
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<h1 class="topictitle1">Modifying the Flow Control Mode</h1> <h1 class="topictitle1">Modifying the Flow Control Mode</h1>
<div id="body0000001169030545"><p id="drs_10_0401__p1732641711612">You can choose whether to control the flow. DRS allows you to change the flow control mode after a task is created. Currently, only the following real-time migration types support this function:</p> <div id="body0000001169030545"><p id="drs_10_0401__p1732641711612">You can choose whether to control the flow. DRS allows you to change the flow control mode after a task is created. Currently, only the following real-time migration types support this function:</p>
<ul id="drs_10_0401__ul1295625714315"><li id="drs_10_0401__li10956857134318">To the cloud<ul id="drs_10_0401__ul185706254414"><li id="drs_10_0401__li61761939442">MySQL-&gt;MySQL</li><li id="drs_10_0401__li1317614315446">MySQL -&gt; GaussDB(for MySQL) primary/standby</li><li id="drs_10_0401__li21779364419">Oracle-&gt;PostgreSQL</li><li id="drs_10_0401__li817711304410">PostgreSQL-&gt;PostgreSQL</li></ul> <ul id="drs_10_0401__ul1295625714315"><li id="drs_10_0401__li10956857134318">To the cloud<ul id="drs_10_0401__ul185706254414"><li id="drs_10_0401__li61761939442">MySQL-&gt;MySQL</li><li id="drs_10_0401__li1317614315446">MySQL -&gt; GaussDB(for MySQL) primary/standby</li><li id="drs_10_0401__li817711304410">PostgreSQL-&gt;PostgreSQL</li></ul>
</li><li id="drs_10_0401__li20946165185019">Out of the cloud<ul id="drs_10_0401__ul1347962275013"><li id="drs_10_0401__li76449341509">MySQL-&gt;MySQL</li></ul> </li><li id="drs_10_0401__li20946165185019">Out of the cloud<ul id="drs_10_0401__ul1347962275013"><li id="drs_10_0401__li76449341509">MySQL-&gt;MySQL</li></ul>
</li><li id="drs_10_0401__li158036885010">Self-built databases -&gt; Self-built databases<ul id="drs_10_0401__ul1227441517501"><li id="drs_10_0401__li231763616506">MySQL-&gt;MySQL</li></ul> </li><li id="drs_10_0401__li158036885010">Self-built databases -&gt; Self-built databases<ul id="drs_10_0401__ul1227441517501"><li id="drs_10_0401__li231763616506">MySQL-&gt;MySQL</li></ul>
</li></ul> </li></ul>

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<div class="section" id="drs_11_0002__en-us_topic_0000001160467806_section9848171516159"><h4 class="sectiontitle">PostgreSQL Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0002__en-us_topic_0000001160467806_table15785204081513" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Checking whether the destination database is connected</caption><tbody><tr id="drs_11_0002__en-us_topic_0000001160467806_row1680074071514"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.1.1"><p id="drs_11_0002__en-us_topic_0000001160467806_p58002403151">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.1.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p13800124031517">Whether the destination database is connected</p>
</td>
</tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row2800540131512"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.2.1"><p id="drs_11_0002__en-us_topic_0000001160467806_p780024071513">Description</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.2.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p17800194017152">Check the connectivity and accuracy of the IP address, port number, username, and password of the destination database.</p>
</td>
</tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row1780010405155"><th class="firstcol" rowspan="7" valign="top" width="11%" id="mcps1.3.2.2.2.3.3.1"><p id="drs_11_0002__en-us_topic_0000001160467806_p1380014401150">Failure Cause and Handling Suggestion</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p8242142143414">Failure cause: The IP address is inaccessible.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p080511391559">Handling suggestion: Configure the network by referring to "Network Types" in section Real-Time Migration.</p>
</td>
</tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row13300155113327"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p5300185110321">Failure cause: The connection fails.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p041304212513">Handling suggestion: Configure the network by referring to "Network Types" in section Real-Time Migration.</p>
</td>
</tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row845618542320"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p154561554173217">Failure cause: The database account does not allow remote connections.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p16404119354">Handling suggestion:</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p15770183143512">Grant the remote connection permission for the user in the <strong id="drs_11_0002__en-us_topic_0000001160467806_b0217020271">pg_hba.conf</strong> file because the replication instance and user are not configured in the <strong id="drs_11_0002__en-us_topic_0000001160467806_b59751927202510">pg_hba.conf</strong> configuration file.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p479832719208">Add the following to the <strong id="drs_11_0002__en-us_topic_0000001160467806_b1226218684420">pg_hba.conf</strong> configuration file. After the migration is complete, delete this record and restart the database for the modification to take effect.</p>
<pre class="codeblock" id="drs_11_0002__en-us_topic_0000001160467806_codeblock11798102713201">host all xxx(dbuser) 0.0.0.0/0 password</pre>
</td>
</tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row1725295819327"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p1425205818324">Failure cause: Failed to connect to the database. The failure may be caused by the incorrect <strong id="drs_11_0002__en-us_topic_0000001160467806_b84235270611272">listen_addresses</strong> parameter value or port number in <strong id="drs_11_0002__en-us_topic_0000001160467806_b84235270611278">postgres.conf</strong>.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p1915411563514">Handling suggestion: In the <strong id="drs_11_0002__en-us_topic_0000001160467806_b5503155073411">postgres.conf</strong> file, set <strong id="drs_11_0002__en-us_topic_0000001160467806_b1560614615356">listen_addresses</strong> to "*" or set the port number to the correct value. Then, restart the database for the modification to take effect.</p>
</td>
</tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row38626016334"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p1686210133317">Failure cause: Incorrect username or password</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p2920137113519">Handling suggestion: Check whether the input username and password for the connection test are correct.</p>
</td>
</tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row157211633334"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p2072113317330">Failure cause: The user does not have the login permission.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p16541511193518">Handling suggestion:</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p717685414352">Run the following command to grant the login permission to the user:</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p93631514351"><strong id="drs_11_0002__en-us_topic_0000001160467806_b7814427142011">alter role</strong> <em id="drs_11_0002__en-us_topic_0000001160467806_i198144276200">xxx(dbuser)</em><strong id="drs_11_0002__en-us_topic_0000001160467806_b1481432716208"> login</strong></p>
</td>
</tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row560319444331"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p196031844103318">Failure cause: The postgres database does not exist in the source database.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p10592191516357">Handling suggestion: Create a postgres database.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="drs_11_0002__en-us_topic_0000001160467806_section16644185411513"><h4 class="sectiontitle">MongoDB Migration</h4> <div class="section" id="drs_11_0002__en-us_topic_0000001160467806_section16644185411513"><h4 class="sectiontitle">MongoDB Migration</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0002__en-us_topic_0000001160467806_table17962151061618" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Checking whether the destination database is connected</caption><tbody><tr id="drs_11_0002__en-us_topic_0000001160467806_row3962910151616"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.1.1"><p id="drs_11_0002__en-us_topic_0000001160467806_p096201051611">Check Item</p> <div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0002__en-us_topic_0000001160467806_table17962151061618" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Checking whether the destination database is connected</caption><tbody><tr id="drs_11_0002__en-us_topic_0000001160467806_row3962910151616"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.1.1"><p id="drs_11_0002__en-us_topic_0000001160467806_p096201051611">Check Item</p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.1.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p1996201011163">Whether the destination database is connected</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.1.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p1996201011163">Whether the destination database is connected</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row1497661010161"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.2.1"><p id="drs_11_0002__en-us_topic_0000001160467806_p4976171013166">Description</p> <tr id="drs_11_0002__en-us_topic_0000001160467806_row1497661010161"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.2.1"><p id="drs_11_0002__en-us_topic_0000001160467806_p4976171013166">Description</p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.2.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p1597691081617">Check the connectivity and accuracy of the IP address, port number, username, and password of the destination database.</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.2.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p1597691081617">Check the connectivity and accuracy of the IP address, port number, username, and password of the destination database.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row897619104162"><th class="firstcol" rowspan="5" valign="top" width="11%" id="mcps1.3.2.2.2.3.3.1"><p id="drs_11_0002__en-us_topic_0000001160467806_p189761510161612">Failure Cause and Handling Suggestion</p> <tr id="drs_11_0002__en-us_topic_0000001160467806_row897619104162"><th class="firstcol" rowspan="5" valign="top" width="11%" id="mcps1.3.3.2.2.3.3.1"><p id="drs_11_0002__en-us_topic_0000001160467806_p189761510161612">Failure Cause and Handling Suggestion</p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p1493215416382">Failure cause: The connection fails.</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p1493215416382">Failure cause: The connection fails.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p1070616481756">Handling suggestion: Configure the network by referring to "Network Types" in section Real-Time Migration.</p> <p id="drs_11_0002__en-us_topic_0000001160467806_p1070616481756">Handling suggestion: Configure the network by referring to "Network Types" in section Real-Time Migration.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row10993111041616"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p169206402383">Failure cause: Incorrect username or password</p> <tr id="drs_11_0002__en-us_topic_0000001160467806_row10993111041616"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p169206402383">Failure cause: Incorrect username or password</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p63014017386">Handling suggestion: Check whether the input username and password for the connection test are correct.</p> <p id="drs_11_0002__en-us_topic_0000001160467806_p63014017386">Handling suggestion: Check whether the input username and password for the connection test are correct.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row19791528173720"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p139798284372">Failure cause: The database is unavailable.</p> <tr id="drs_11_0002__en-us_topic_0000001160467806_row19791528173720"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p139798284372">Failure cause: The database is unavailable.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p18843152510386">Handling suggestion: Contact technical support.</p> <p id="drs_11_0002__en-us_topic_0000001160467806_p18843152510386">Handling suggestion: Contact technical support.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row16589831133713"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p1654217594375">Failure cause: An internal error occurs.</p> <tr id="drs_11_0002__en-us_topic_0000001160467806_row16589831133713"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p1654217594375">Failure cause: An internal error occurs.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p9483122833812">Handling suggestion: Contact technical support.</p> <p id="drs_11_0002__en-us_topic_0000001160467806_p9483122833812">Handling suggestion: Contact technical support.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0002__en-us_topic_0000001160467806_row18511162610373"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p19511112610373">Failure cause: SSL connection parameters are not configured.</p> <tr id="drs_11_0002__en-us_topic_0000001160467806_row18511162610373"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0002__en-us_topic_0000001160467806_p19511112610373">Failure cause: SSL connection parameters are not configured.</p>
<p id="drs_11_0002__en-us_topic_0000001160467806_p2021893211381">Handling suggestion: Contact technical support.</p> <p id="drs_11_0002__en-us_topic_0000001160467806_p2021893211381">Handling suggestion: Contact technical support.</p>
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<div class="section" id="drs_11_0005__en-us_topic_0000001205627735_section5102154020195"><h4 class="sectiontitle">Oracle Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0005__en-us_topic_0000001205627735_table151021340181915" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Checking whether source database version is supported</caption><tbody><tr id="drs_11_0005__en-us_topic_0000001205627735_row3103104015191"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.1.1"><p id="drs_11_0005__en-us_topic_0000001205627735_p310304013199">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.1.1 "><p id="drs_11_0005__en-us_topic_0000001205627735_p1810324010195">Whether the source database version is supported</p>
</td>
</tr>
<tr id="drs_11_0005__en-us_topic_0000001205627735_row141031440191920"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.2.1"><p id="drs_11_0005__en-us_topic_0000001205627735_p41038401197">Description</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.2.1 "><p id="drs_11_0005__en-us_topic_0000001205627735_p1910314016198">Check whether the source database version is Oracle 10g, 11g, 12c, 18c, or 19c.</p>
</td>
</tr>
<tr id="drs_11_0005__en-us_topic_0000001205627735_row110374015195"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.3.1"><p id="drs_11_0005__en-us_topic_0000001205627735_p13104540181918">Failure Cause and Handling Suggestion</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0005__en-us_topic_0000001205627735_p310424011199">Failure cause: The source database version is not supported.</p>
<p id="drs_11_0005__en-us_topic_0000001205627735_p410404011918">Handling suggestion: Check whether the source database version is supported. Currently, only Oracle 10g, 11g, 12c, 18c, and 19c are supported.</p>
</td>
</tr>
</tbody>
</table>
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<div class="section" id="drs_11_0007__en-us_topic_0000001205747757_section13371217343"><h4 class="sectiontitle">PostgreSQL Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0007__en-us_topic_0000001205747757_table1828717534330" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Checking whether the migration is from an earlier database version to the same or a later version</caption><tbody><tr id="drs_11_0007__en-us_topic_0000001205747757_row928715319335"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.1.1"><p id="drs_11_0007__en-us_topic_0000001205747757_p1028711530339">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.1.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p1728711536333">Whether the migration is from an earlier database version to the same or a later version</p>
</td>
</tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row1428712532337"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.2.1"><p id="drs_11_0007__en-us_topic_0000001205747757_p172871353193310">Description</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.2.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p3287165313334">Check whether the source database version is earlier than or the same as the destination database version.</p>
</td>
</tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row132879539336"><th class="firstcol" rowspan="8" valign="top" width="11%" id="mcps1.3.2.2.2.3.3.1"><p id="drs_11_0007__en-us_topic_0000001205747757_p828715530336">Failure Cause and Handling Suggestion</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p16893713113110"></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p1614134064919">Failure cause: This item cannot be checked because the source database fails to be connected.</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p1021923974918">Handling suggestion: Check whether the source database is connected.</p>
</td>
</tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row659812583473"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p14598175811479">Failure cause: This item cannot be checked because the destination database fails to be connected.</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p198526487488">Handling suggestion: Check whether the destination database is connected.</p>
</td>
</tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row436331154812"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p183633194811">Failure cause: Insufficient user permissions</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p1249214546489">Handling suggestion: Check whether the database user permissions meet the migration requirements.</p>
</td>
</tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row181813419488"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p21844104819">Failure cause: The source database version is not supported.</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p18861823496">Handling suggestion: Check whether the source database version is supported. Currently, only PostgreSQL 9.4, 9.5, 9.6, 10.0, 11.0, 12.0, and 13.0 are supported.</p>
</td>
</tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row292518614818"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p6711436154812">Failure cause: The destination database version is not supported.</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p1921188114912">Handling suggestion: Check whether the destination database version is supported. Currently, only PostgreSQL 9.5, 9.6, 10.0, 11.0, 12.0, and 13.0 are supported.</p>
</td>
</tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row201331912194813"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p1313321284812">Failure cause: The major versions of the source and destination databases must be the same and the minor version of the source database must be less than or equal to that of the destination database.</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p1079718136496">Handling suggestion: Ensure the source database version is earlier than or the same as the destination database version.</p>
</td>
</tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row4303125373312"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p18392228124915">Failure cause: An internal error occurs.</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p62355355491">Handling suggestion: Contact technical support.</p>
</td>
</tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row789310137319"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p19246111910332">Failure cause: The destination database version and source database version do not meet the requirements of the selected migration mode.</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p112019377336">Handling suggestion: Check whether the versions of the destination database and source database meet the migration mode requirements.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="drs_11_0007__en-us_topic_0000001205747757_section20151155022615"><h4 class="sectiontitle">MongoDB Migration</h4> <div class="section" id="drs_11_0007__en-us_topic_0000001205747757_section20151155022615"><h4 class="sectiontitle">MongoDB Migration</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0007__en-us_topic_0000001205747757_table20660183192517" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Checking Whether the Source Database Version Is Supported</caption><tbody><tr id="drs_11_0007__en-us_topic_0000001205747757_row16660931202512"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.1.1"><p id="drs_11_0007__en-us_topic_0000001205747757_p1117191712104">Check Item</p> <div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0007__en-us_topic_0000001205747757_table20660183192517" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Checking Whether the Source Database Version Is Supported</caption><tbody><tr id="drs_11_0007__en-us_topic_0000001205747757_row16660931202512"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.1.1"><p id="drs_11_0007__en-us_topic_0000001205747757_p1117191712104">Check Item</p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.1.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p101719178104">Whether the migration is from an earlier database version to the same or a later version</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.1.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p101719178104">Whether the migration is from an earlier database version to the same or a later version</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row7660131132513"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.2.1"><p id="drs_11_0007__en-us_topic_0000001205747757_p01711741011">Description</p> <tr id="drs_11_0007__en-us_topic_0000001205747757_row7660131132513"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.2.1"><p id="drs_11_0007__en-us_topic_0000001205747757_p01711741011">Description</p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.2.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p141771712109">Check whether the source database version is earlier than or the same as the destination database version. The destination database version can be 4.0.x or later. The migration must be performed from an older database version to the same or a newer version Check whether the features of the newer version are used in the source database. If the new features are not supported in the destination database, the synchronization may fail.</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.2.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p141771712109">Check whether the source database version is earlier than or the same as the destination database version. The destination database version can be 4.0.x or later. The migration must be performed from an older database version to the same or a newer version Check whether the features of the newer version are used in the source database. If the new features are not supported in the destination database, the synchronization may fail.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row16601931172514"><th class="firstcol" rowspan="2" valign="top" width="11%" id="mcps1.3.2.2.2.3.3.1"><p id="drs_11_0007__en-us_topic_0000001205747757_p1717111717104">Failure Cause and Handling Suggestion</p> <tr id="drs_11_0007__en-us_topic_0000001205747757_row16601931172514"><th class="firstcol" rowspan="2" valign="top" width="11%" id="mcps1.3.3.2.2.3.3.1"><p id="drs_11_0007__en-us_topic_0000001205747757_p1717111717104">Failure Cause and Handling Suggestion</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p1384818412287"></p> <p id="drs_11_0007__en-us_topic_0000001205747757_p1384818412287"></p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p1517151719105">Item to be confirmed: The versions of the source and destination databases are different.</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p1517151719105">Item to be confirmed: The versions of the source and destination databases are different.</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p151761714108">Potential problem: The source database version is 4.4.5 and the destination database version is 4.0.3, which does not comply with the migration version requirements. If the source database supports features of the newer version but the destination database does not, the synchronization may fail.</p> <p id="drs_11_0007__en-us_topic_0000001205747757_p151761714108">Potential problem: The source database version is 4.4.5 and the destination database version is 4.0.3, which does not comply with the migration version requirements. If the source database supports features of the newer version but the destination database does not, the synchronization may fail.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0007__en-us_topic_0000001205747757_row184715410288"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p9400204713296">Failure cause: The destination database version does not meet the requirements.</p> <tr id="drs_11_0007__en-us_topic_0000001205747757_row184715410288"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0007__en-us_topic_0000001205747757_p9400204713296">Failure cause: The destination database version does not meet the requirements.</p>
<p id="drs_11_0007__en-us_topic_0000001205747757_p13476151102916">Handling suggestion: Select version 4.0.x for the destination database because the source database version is later than 4.0.x and the destination database version is 3.4.x.</p> <p id="drs_11_0007__en-us_topic_0000001205747757_p13476151102916">Handling suggestion: Select version 4.0.x for the destination database because the source database version is later than 4.0.x and the destination database version is 3.4.x.</p>
</td> </td>
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<div class="section" id="drs_11_0009__en-us_topic_0000001160307886_section1773153820390"><h4 class="sectiontitle">PostgreSQL Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0009__en-us_topic_0000001160307886_table1324714933911" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Checking whether the source database user has sufficient permissions </caption><tbody><tr id="drs_11_0009__en-us_topic_0000001160307886_row02476973919"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.1.1"><p id="drs_11_0009__en-us_topic_0000001160307886_p6247109113913">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.1.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p1524714913912">Whether the source database user has sufficient permissions</p>
</td>
</tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row424719914399"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.2.1"><p id="drs_11_0009__en-us_topic_0000001160307886_p5262199193919">Description</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.2.1 "><p id="drs_11_0009__p18309175715473">Different types of synchronization tasks require different permissions.</p>
<ul id="drs_11_0009__ul11716145910348"><li id="drs_11_0009__li10716115923412"><strong id="drs_11_0009__b192816610396">Full synchornization:</strong> The CONNECT permission for databases, the USAGE permission for schemas, the SELECT permission for tables, the SELECT permission for sequences, and the SELECT permission for system table <strong id="drs_11_0009__b184115515387">catalog pg_catalog.pg_authid</strong> (used for synchronizing user passwords)</li></ul>
<ul id="drs_11_0009__ul10671554359"><li id="drs_11_0009__li96785143518"><strong id="drs_11_0009__b797246133910">Full+incremental synchronization</strong>: The CONNECT permission for databases, the USAGE permission for schemas, the SELECT permission for tables, the SELECT permission for sequences, the SELECT permission for system table <strong id="drs_11_0009__b5733838193919">pg_catalog.pg_authid</strong> (used for synchronizing user passwords), the UPDATE, DELETE, and TRUNCATE permissions for tables that do not have primary keys, and the permission to create a replication connection.</li></ul>
<p id="drs_11_0009__en-us_topic_0000001160307886_p092101110618">If the permissions are insufficient, the migration will fail.</p>
</td>
</tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row172623923919"><th class="firstcol" rowspan="7" valign="top" width="11%" id="mcps1.3.2.2.2.3.3.1"><p id="drs_11_0009__en-us_topic_0000001160307886_p1326213983911">Failure Cause and Handling Suggestion</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p136831241185617">Failure cause: This item cannot be checked because the source database fails to be connected.</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p10714540125614">Handling suggestion: Check whether the source database is connected.</p>
</td>
</tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row92621792398"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p48861837205617">Failure cause: Insufficient user permissions</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p199174382569">Handling suggestion: Check whether the database user permissions meet the migration requirements.</p>
</td>
</tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row2797531409"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p1844120581500">Failure cause: In a full migration, the source database user must have the SELECT, REFERENCES, TRIGGER, EXECUTE, and USAGE permissions.</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p144411358709">Handling suggestion: Change or authorize the migration account.</p>
</td>
</tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row1810412355318"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p510414395315">Failure cause: The replication permission is not configured in <strong id="drs_11_0009__en-us_topic_0000001160307886_b202111654155112">pg_hba.conf</strong> for the replication instance and database user.</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p736417459573">Handling suggestion:</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p2074173125619">Grant the replication permission to the user.</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p328771117200">Add the following to <strong id="drs_11_0009__en-us_topic_0000001160307886_b1488768969114023">pg_hba.conf</strong>, and restart the database for the modification to take effect:</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p82871427161919"><strong id="drs_11_0009__en-us_topic_0000001160307886_b1382646162018">host replication</strong> <em id="drs_11_0009__en-us_topic_0000001160307886_i67221151112016">XXX(dbuser)</em> <strong id="drs_11_0009__en-us_topic_0000001160307886_b18175125719205">0.0.0.0/0</strong> <em id="drs_11_0009__en-us_topic_0000001160307886_i113001259217">password</em></p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p9881110185618">After the migration is complete, delete this record and restart the database again.</p>
</td>
</tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row173071959533"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p14307558539">Failure cause: The <strong id="drs_11_0009__en-us_topic_0000001160307886_b1011063752911">max_wal_senders</strong> value in the source database is too small.</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p1354133911551">Handling suggestion: In the <strong id="drs_11_0009__en-us_topic_0000001160307886_b865913181614">postgresql.conf</strong> file, change the <strong id="drs_11_0009__en-us_topic_0000001160307886_b1366117188111">max_wal_senders</strong> value to a larger one, such as increasing it by 5 or 10.</p>
</td>
</tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row740247185316"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p0277629165313">Failure cause: The database is unavailable.</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p31822037115319">Handling suggestion: Contact technical support.</p>
</td>
</tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row4104110175317"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p181042105538">Failure cause: An internal error occurs.</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p1090584015533">Handling suggestion: Contact technical support.</p>
</td>
</tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row123531729132910"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.10.1"><p id="drs_11_0009__en-us_topic_0000001160307886_p136757115259">Item to Be Confirmed and Handling Suggestion</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.10.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p267591182511">Item to be confirmed: The source database contains objects that can only be created by a superuser. The destination user is not a superuser, so the objects will be ignored. </p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p173748712612">Handling suggestion: Use a superuser of the destination database or confirm that these objects can be ignored.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="drs_11_0009__en-us_topic_0000001160307886_section1275729103916"><h4 class="sectiontitle">MongoDB Migration</h4> <div class="section" id="drs_11_0009__en-us_topic_0000001160307886_section1275729103916"><h4 class="sectiontitle">MongoDB Migration</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0009__en-us_topic_0000001160307886_table9377978185833" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Checking whether the source database user has sufficient permissions </caption><tbody><tr id="drs_11_0009__en-us_topic_0000001160307886_row2529615185833"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.1.1"><p id="drs_11_0009__en-us_topic_0000001160307886_p5284851919057">Check Item</p> <div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0009__en-us_topic_0000001160307886_table9377978185833" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Checking whether the source database user has sufficient permissions </caption><tbody><tr id="drs_11_0009__en-us_topic_0000001160307886_row2529615185833"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.1.1"><p id="drs_11_0009__en-us_topic_0000001160307886_p5284851919057">Check Item</p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.1.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p27563616193151">Whether the source database user has sufficient permissions</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.1.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p27563616193151">Whether the source database user has sufficient permissions</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row16520376185833"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.2.1"><p id="drs_11_0009__en-us_topic_0000001160307886_p5474277219057">Description</p> <tr id="drs_11_0009__en-us_topic_0000001160307886_row16520376185833"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.2.1"><p id="drs_11_0009__en-us_topic_0000001160307886_p5474277219057">Description</p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.2.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p15596517193159">Check whether the source database user permissions meet the migration requirements. If the permissions are insufficient, the migration will fail.</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.2.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p15596517193159">Check whether the source database user permissions meet the migration requirements. If the permissions are insufficient, the migration will fail.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row17265882185833"><th class="firstcol" rowspan="3" valign="top" width="11%" id="mcps1.3.2.2.2.3.3.1"><p id="drs_11_0009__en-us_topic_0000001160307886_p69333219057">Failure Cause and Handling Suggestion</p> <tr id="drs_11_0009__en-us_topic_0000001160307886_row17265882185833"><th class="firstcol" rowspan="3" valign="top" width="11%" id="mcps1.3.3.2.2.3.3.1"><p id="drs_11_0009__en-us_topic_0000001160307886_p69333219057">Failure Cause and Handling Suggestion</p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p138698544589">Failure cause: This item cannot be checked because the source database fails to be connected.</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p138698544589">Failure cause: This item cannot be checked because the source database fails to be connected.</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p1613385495818">Handling suggestion: Check whether the source database is connected.</p> <p id="drs_11_0009__en-us_topic_0000001160307886_p1613385495818">Handling suggestion: Check whether the source database is connected.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row15232124185833"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p193841351165814">Failure cause: The source database user does not have the required permissions.</p> <tr id="drs_11_0009__en-us_topic_0000001160307886_row15232124185833"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p193841351165814">Failure cause: The source database user does not have the required permissions.</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p82741952195812">Handling suggestion: Check whether the source database user permissions meet the migration requirements.</p> <p id="drs_11_0009__en-us_topic_0000001160307886_p82741952195812">Handling suggestion: Check whether the source database user permissions meet the migration requirements.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0009__en-us_topic_0000001160307886_row14661121925818"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p41343352582">Failure cause: An internal error occurs.</p> <tr id="drs_11_0009__en-us_topic_0000001160307886_row14661121925818"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0009__en-us_topic_0000001160307886_p41343352582">Failure cause: An internal error occurs.</p>
<p id="drs_11_0009__en-us_topic_0000001160307886_p14646834125817">Handling suggestion: Contact technical support.</p> <p id="drs_11_0009__en-us_topic_0000001160307886_p14646834125817">Handling suggestion: Contact technical support.</p>
</td> </td>
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<div class="section" id="drs_11_0010__en-us_topic_0000001205509305_section19736191015458"><h4 class="sectiontitle">PostgreSQL Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0010__en-us_topic_0000001205509305_table19961126194420" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Checking whether the destination database has sufficient storage space</caption><tbody><tr id="drs_11_0010__en-us_topic_0000001205509305_row4996172610445"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.1.1"><p id="drs_11_0010__en-us_topic_0000001205509305_p29969266447"><strong id="drs_11_0010__en-us_topic_0000001205509305_b15974553142911">Check Item</strong></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.1.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p169961526104413">Whether the destination database has sufficient storage space</p>
</td>
</tr>
<tr id="drs_11_0010__en-us_topic_0000001205509305_row21216272440"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.2.1"><p id="drs_11_0010__en-us_topic_0000001205509305_p31212278441"><strong id="drs_11_0010__en-us_topic_0000001205509305_b1055110561298">Description</strong></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.2.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p312192718443">Check whether the destination database has sufficient storage space. If storage space is insufficient, the synchronization will fail.</p>
</td>
</tr>
<tr id="drs_11_0010__en-us_topic_0000001205509305_row1712172718440"><th class="firstcol" rowspan="3" valign="top" width="11%" id="mcps1.3.2.2.2.3.3.1"><p id="drs_11_0010__en-us_topic_0000001205509305_p1112192720447">Failure Cause and Handling Suggestion</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p14494431148">Failure cause: This item cannot be checked because the source database fails to be connected.</p>
<p id="drs_11_0010__en-us_topic_0000001205509305_p28400421647">Handling suggestion: Check whether the source database is connected.</p>
</td>
</tr>
<tr id="drs_11_0010__en-us_topic_0000001205509305_row121252784414"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p36041413414">Failure cause: The destination database does not have sufficient storage space (at least 1.5 times the size of the source database).</p>
<p id="drs_11_0010__en-us_topic_0000001205509305_p207616401344">Handling suggestion: Scale up or clean up the destination database storage space. If you clean up the storage space, you will obtain more space within 2 to 3 minutes.</p>
<div class="note" id="drs_11_0010__en-us_topic_0000001205509305_note54335113476"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="drs_11_0010__en-us_topic_0000001205509305_p104414513470">It is recommended that the size of the destination database disk be set to the smaller value of the following two values:</p>
<ol id="drs_11_0010__en-us_topic_0000001205509305_ol24495110478"><li id="drs_11_0010__en-us_topic_0000001205509305_li164455116476">1.5 times the size of the data to be migrated in the source database.</li><li id="drs_11_0010__en-us_topic_0000001205509305_li94420512473">The size of the data to be migrated in the source database plus 200 GB.</li></ol>
</div></div>
</td>
</tr>
<tr id="drs_11_0010__en-us_topic_0000001205509305_row1278710119414"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p47871111445">Failure cause: An internal error occurs.</p>
<p id="drs_11_0010__en-us_topic_0000001205509305_p4725719345">Handling suggestion: Contact technical support.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="drs_11_0010__en-us_topic_0000001205509305_section83372317459"><h4 class="sectiontitle">MongoDB Migration</h4> <div class="section" id="drs_11_0010__en-us_topic_0000001205509305_section83372317459"><h4 class="sectiontitle">MongoDB Migration</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0010__en-us_topic_0000001205509305_table1768320431444" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Checking whether the destination database has sufficient storage space</caption><tbody><tr id="drs_11_0010__en-us_topic_0000001205509305_row3683443204413"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.1.1"><p id="drs_11_0010__en-us_topic_0000001205509305_p19683114315446"><strong id="drs_11_0010__en-us_topic_0000001205509305_b18184122483116">Check Item</strong></p> <div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0010__en-us_topic_0000001205509305_table1768320431444" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Checking whether the destination database has sufficient storage space</caption><tbody><tr id="drs_11_0010__en-us_topic_0000001205509305_row3683443204413"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.1.1"><p id="drs_11_0010__en-us_topic_0000001205509305_p19683114315446"><strong id="drs_11_0010__en-us_topic_0000001205509305_b18184122483116">Check Item</strong></p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.1.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p1268374310441">Whether the destination database has sufficient storage space</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.1.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p1268374310441">Whether the destination database has sufficient storage space</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0010__en-us_topic_0000001205509305_row1268315432446"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.2.1"><p id="drs_11_0010__en-us_topic_0000001205509305_p17699143104410"><strong id="drs_11_0010__en-us_topic_0000001205509305_b1566572612319">Description</strong></p> <tr id="drs_11_0010__en-us_topic_0000001205509305_row1268315432446"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.2.1"><p id="drs_11_0010__en-us_topic_0000001205509305_p17699143104410"><strong id="drs_11_0010__en-us_topic_0000001205509305_b1566572612319">Description</strong></p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.2.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p10699164304413">Check whether the destination database has sufficient storage space. If storage space is insufficient, the migration will fail.</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.2.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p10699164304413">Check whether the destination database has sufficient storage space. If storage space is insufficient, the migration will fail.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0010__en-us_topic_0000001205509305_row4699204384412"><th class="firstcol" rowspan="3" valign="top" width="11%" id="mcps1.3.2.2.2.3.3.1"><p id="drs_11_0010__en-us_topic_0000001205509305_p12123291782">Failure Cause and Handling Suggestion</p> <tr id="drs_11_0010__en-us_topic_0000001205509305_row4699204384412"><th class="firstcol" rowspan="3" valign="top" width="11%" id="mcps1.3.3.2.2.3.3.1"><p id="drs_11_0010__en-us_topic_0000001205509305_p12123291782">Failure Cause and Handling Suggestion</p>
</th> </th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p4313205611518">Failure cause: This item cannot be checked because the source database fails to be connected.</p> <td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p4313205611518">Failure cause: This item cannot be checked because the source database fails to be connected.</p>
<p id="drs_11_0010__en-us_topic_0000001205509305_p1067213556513">Handling suggestion: Check whether the source database is connected.</p> <p id="drs_11_0010__en-us_topic_0000001205509305_p1067213556513">Handling suggestion: Check whether the source database is connected.</p>
</td> </td>
</tr> </tr>
<tr id="drs_11_0010__en-us_topic_0000001205509305_row1869916434444"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p620420544516">Failure cause: The destination database does not have sufficient storage space (at least 1.5 times the size of the source database).</p> <tr id="drs_11_0010__en-us_topic_0000001205509305_row1869916434444"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p620420544516">Failure cause: The destination database does not have sufficient storage space (at least 1.5 times the size of the source database).</p>
<p id="drs_11_0010__en-us_topic_0000001205509305_p1834417531354">Handling suggestion: Scale up or clean up the destination database storage space. If you clean up the storage space, you will obtain more space within 2 to 3 minutes.</p> <p id="drs_11_0010__en-us_topic_0000001205509305_p1834417531354">Handling suggestion: Scale up or clean up the destination database storage space. If you clean up the storage space, you will obtain more space within 2 to 3 minutes.</p>
<div class="note" id="drs_11_0010__en-us_topic_0000001205509305_note14495970515"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="drs_11_0010__en-us_topic_0000001205509305_p649511720514">It is recommended that the size of the destination database disk be set to the smaller value of the following two values:</p> <div class="note" id="drs_11_0010__en-us_topic_0000001205509305_note14495970515"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="drs_11_0010__en-us_topic_0000001205509305_p649511720514">It is recommended that the size of the destination database disk be set to the smaller value of the following two values:</p>
<ol id="drs_11_0010__en-us_topic_0000001205509305_ol15495278513"><li id="drs_11_0010__en-us_topic_0000001205509305_li184955717511">1.5 times the size of the data to be migrated in the source database.</li><li id="drs_11_0010__en-us_topic_0000001205509305_li64958785110">The size of the data to be migrated in the source database plus 200 GB.</li></ol> <ol id="drs_11_0010__en-us_topic_0000001205509305_ol15495278513"><li id="drs_11_0010__en-us_topic_0000001205509305_li184955717511">1.5 times the size of the data to be migrated in the source database.</li><li id="drs_11_0010__en-us_topic_0000001205509305_li64958785110">The size of the data to be migrated in the source database plus 200 GB.</li></ol>
</div></div> </div></div>
</td> </td>
</tr> </tr>
<tr id="drs_11_0010__en-us_topic_0000001205509305_row1458918284520"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p258912281513">Failure cause: An internal error occurs.</p> <tr id="drs_11_0010__en-us_topic_0000001205509305_row1458918284520"><td class="cellrowborder" valign="top" headers="mcps1.3.3.2.2.3.3.1 "><p id="drs_11_0010__en-us_topic_0000001205509305_p258912281513">Failure cause: An internal error occurs.</p>
<p id="drs_11_0010__en-us_topic_0000001205509305_p078313371857">Handling suggestion: Contact technical support.</p> <p id="drs_11_0010__en-us_topic_0000001205509305_p078313371857">Handling suggestion: Contact technical support.</p>
</td> </td>
</tr> </tr>

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<h1 class="topictitle1">Checking Whether the lc_monetary Values of the Source and Destination Databases Are the Same</h1>
<div id="body8662426"><div class="section" id="drs_11_0038__en-us_topic_0000001160467768_section1319522194420"><h4 class="sectiontitle">PostgreSQL Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0038__en-us_topic_0000001160467768_table19854114654519" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the lc_monetary values of the source and destination databases are the same</caption><tbody><tr id="drs_11_0038__en-us_topic_0000001160467768_row148701146204510"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_11_0038__en-us_topic_0000001160467768_p98701446114518"><strong id="drs_11_0038__en-us_topic_0000001160467768_b184581727204819">Check Item</strong></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.1.1 "><p id="drs_11_0038__en-us_topic_0000001160467768_p158702467457">Whether the <strong id="drs_11_0038__en-us_topic_0000001160467768_b15601203571515">lc_monetary</strong> values of the source and destination databases are the same</p>
</td>
</tr>
<tr id="drs_11_0038__en-us_topic_0000001160467768_row3870204634516"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.2.1"><p id="drs_11_0038__en-us_topic_0000001160467768_p588510462454"><strong id="drs_11_0038__en-us_topic_0000001160467768_b9217233174812">Description</strong></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.2.1 "><p id="drs_11_0038__en-us_topic_0000001160467768_p8885646184518">Check whether the <strong id="drs_11_0038__en-us_topic_0000001160467768_b854755516545">lc_monetary</strong> values of the source and destination databases are the same. If they are inconsistent, the synchronization fails.</p>
</td>
</tr>
<tr id="drs_11_0038__en-us_topic_0000001160467768_row38853464458"><th class="firstcol" rowspan="5" valign="top" width="11%" id="mcps1.3.1.2.2.3.3.1"><p id="drs_11_0038__en-us_topic_0000001160467768_p1288554694514">Failure Cause and Handling Suggestion</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0038__en-us_topic_0000001160467768_p4701127105111">Failure cause: This item cannot be checked because the source database failed to be connected.</p>
<p id="drs_11_0038__en-us_topic_0000001160467768_p07686135118">Handling suggestion: Check whether the source database is connected.</p>
</td>
</tr>
<tr id="drs_11_0038__en-us_topic_0000001160467768_row187604513504"><td class="cellrowborder" valign="top" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0038__en-us_topic_0000001160467768_p5760856508">Failure cause: This item cannot be checked because the destination database failed to be connected.</p>
<p id="drs_11_0038__en-us_topic_0000001160467768_p191603535010">Handling suggestion: Check whether the destination database is connected.</p>
</td>
</tr>
<tr id="drs_11_0038__en-us_topic_0000001160467768_row12385082500"><td class="cellrowborder" valign="top" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0038__en-us_topic_0000001160467768_p183855812501">Failure cause: The <span class="parmname" id="drs_11_0038__parmname19950142114512"><b>lc_monetary</b></span> values of the source and destination databases must be the same.</p>
<p id="drs_11_0038__en-us_topic_0000001160467768_p16869184118509">Handling suggestion: Check whether the <span class="parmname" id="drs_11_0038__parmname1785562719126"><b>lc_monetary</b></span> values of the source and destination databases meet the synchronization requirements.</p>
</td>
</tr>
<tr id="drs_11_0038__en-us_topic_0000001160467768_row257101117501"><td class="cellrowborder" valign="top" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0038__en-us_topic_0000001160467768_p11326193185116">Failure cause: Insufficient user permissions</p>
<p id="drs_11_0038__en-us_topic_0000001160467768_p177170216512">Handling suggestion: Check whether the database user permissions meet the synchronization requirements.</p>
</td>
</tr>
<tr id="drs_11_0038__en-us_topic_0000001160467768_row1490116469453"><td class="cellrowborder" valign="top" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0038__en-us_topic_0000001160467768_p16761814518">Failure cause: An internal error occurs.</p>
<p id="drs_11_0038__en-us_topic_0000001160467768_p99511910516">Handling suggestion: Contact technical support.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_12_0008.html">Database Parameters</a></div>
</div>
</div>

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<h1 class="topictitle1">Checking Whether the Extensions Are Supported</h1>
<div id="body8662426"><div class="section" id="drs_11_0041__en-us_topic_0000001205509257_section1656311500463"><h4 class="sectiontitle">PostgreSQL Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0041__en-us_topic_0000001205509257_table57239365509" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the extensions are supported</caption><tbody><tr id="drs_11_0041__en-us_topic_0000001205509257_row2073863610508"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_11_0041__en-us_topic_0000001205509257_p47381636175010"><strong id="drs_11_0041__en-us_topic_0000001205509257_b16153253193119">Check Item</strong></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.1.1 "><p id="drs_11_0041__en-us_topic_0000001205509257_p157381536205019">Whether the extensions are supported</p>
</td>
</tr>
<tr id="drs_11_0041__en-us_topic_0000001205509257_row17738103619501"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.2.1"><p id="drs_11_0041__en-us_topic_0000001205509257_p8753436175017"><strong id="drs_11_0041__en-us_topic_0000001205509257_b1425764203215">Description</strong></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.2.1 "><p id="drs_11_0041__en-us_topic_0000001205509257_p1375333611501">Check whether the source database has plug-ins that are not installed on the destination database.</p>
</td>
</tr>
<tr id="drs_11_0041__en-us_topic_0000001205509257_row975343616508"><th class="firstcol" rowspan="4" valign="top" width="11%" id="mcps1.3.1.2.2.3.3.1"><p id="drs_11_0041__en-us_topic_0000001205509257_p3753636145017">Failure Cause and Handling Suggestion</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0041__en-us_topic_0000001205509257_p12975164145219">Failure cause: Extensions installed in the source database are not supported in the destination database.</p>
<p id="drs_11_0041__en-us_topic_0000001205509257_p720010501105">Handling suggestion:</p>
<ul id="drs_11_0041__ul95909278204"><li id="drs_11_0041__li55901727122019">If the source database services do not depend on those extensions, run the following statement to delete the extensions. Replace <em id="drs_11_0041__i78054963114">plugin_name</em> with the name of the extension to be deleted.<pre class="codeblock" id="drs_11_0041__codeblock15649144772010">drop extension plugin_name;</pre>
</li><li id="drs_11_0041__li16742123002015">Alternatively, use a destination database that supports these extensions.</li></ul>
</td>
</tr>
<tr id="drs_11_0041__row17783738151116"><td class="cellrowborder" valign="top" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0041__p105741414151212">Failure cause: The source database has extensions that contain tables as members.</p>
<p id="drs_11_0041__p1057411431219">Handling suggestion: Check whether the source database extensions contain metadata generated after the extensions are created. If yes, use the dedicated syntax of the extension to rebuild the metadata after the migration is complete.</p>
</td>
</tr>
<tr id="drs_11_0041__row14319184431111"><td class="cellrowborder" valign="top" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0041__p196610157129">Failure cause: The destination database user does not have the permission to create extensions.</p>
<p id="drs_11_0041__p1235884631412">Handling suggestion: Grant the permission to the user in the destination database as user root. Run the following SQL statements (replace <em id="drs_11_0041__i185291316365">username</em> with the destination database username):</p>
<pre class="codeblock" id="drs_11_0041__codeblock179214569145">alter user username inherit;
grant root to username;</pre>
</td>
</tr>
<tr id="drs_11_0041__row43191844111114"><td class="cellrowborder" valign="top" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0041__p1181841631220">Failure cause: The extension version supported by the destination database is earlier than that installed in the source database.</p>
<p id="drs_11_0041__p188186160126">Handling suggestion: Use the destination database that supports extensions of a later version (not earlier than the source database extension version) and create a synchronization task again.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_12_0006.html">Destination DB Instance Statuses</a></div>
</div>
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<h1 class="topictitle1">Checking Whether the SSL Connection Is Enabled for the Source Database</h1>
<div id="body8662426"><div class="section" id="drs_11_0042__en-us_topic_0000001205627781_section191963424478"><h4 class="sectiontitle">PostgreSQL</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0042__en-us_topic_0000001205627781_table853017177447" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the SSL connection is enabled for the source database</caption><tbody><tr id="drs_11_0042__en-us_topic_0000001205627781_row1854591710447"><th class="firstcol" valign="top" width="24.14%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_11_0042__en-us_topic_0000001205627781_p1356101713440"><strong id="drs_11_0042__en-us_topic_0000001205627781_b19878135815204">Check Item</strong></p>
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<td class="cellrowborder" valign="top" width="75.86%" headers="mcps1.3.1.2.2.3.1.1 "><p id="drs_11_0042__en-us_topic_0000001205627781_p13561917164412">Whether the <span class="keyword" id="drs_11_0042__en-us_topic_0000001205627781_keyword6190152234519">SSL connection</span> is enabled for the source database</p>
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<tr id="drs_11_0042__en-us_topic_0000001205627781_row2057614176447"><th class="firstcol" valign="top" width="24.14%" id="mcps1.3.1.2.2.3.2.1"><p id="drs_11_0042__en-us_topic_0000001205627781_p18576517134410"><strong id="drs_11_0042__en-us_topic_0000001205627781_b444514392120">Description</strong></p>
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<td class="cellrowborder" valign="top" width="75.86%" headers="mcps1.3.1.2.2.3.2.1 "><p id="drs_11_0042__en-us_topic_0000001205627781_p196081717204410">Check whether the SSL connection is enabled for the source database.</p>
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<tr id="drs_11_0042__en-us_topic_0000001205627781_row56083173444"><th class="firstcol" valign="top" width="24.14%" id="mcps1.3.1.2.2.3.3.1"><p id="drs_11_0042__en-us_topic_0000001205627781_p06081617174412">Failure Cause and Handling Suggestion</p>
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<td class="cellrowborder" valign="top" width="75.86%" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0042__en-us_topic_0000001205627781_p062301714444">Failure cause: The source database SSL connection is disabled.</p>
<p id="drs_11_0042__en-us_topic_0000001205627781_p2084215421831">Handling suggestion: In the <strong>postgresql.conf</strong> file, set <strong>ssl_ca_file</strong> to the directory of an SSL root CA certificate and set <strong>ssl</strong> to <strong>on</strong> to enable the SSL connection. Then, restart the database for the modifications to take effect.</p>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_11_0071.html">SSL Connections</a></div>
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<h1 class="topictitle1">Checking Whether the max_wal_senders Value of the Source Database Is Correctly Configured</h1>
<div id="body8662426"><div class="section" id="drs_11_0053__en-us_topic_0000001160467838_section19232412143112"><h4 class="sectiontitle">PostgreSQL Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0053__en-us_topic_0000001160467838_table18108192214474" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the max_wal_senders value of the source database is correctly configured</caption><tbody><tr id="drs_11_0053__en-us_topic_0000001160467838_row19108192294711"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_11_0053__en-us_topic_0000001160467838_p191087222477"><strong id="drs_11_0053__en-us_topic_0000001160467838_b1053153314474">Check Item</strong></p>
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<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.1.1 "><p id="drs_11_0053__en-us_topic_0000001160467838_p01081022104711">Whether the <strong id="drs_11_0053__en-us_topic_0000001160467838_b6543104113478">max_wal_senders</strong> value of the source database is correctly configured</p>
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<tr id="drs_11_0053__en-us_topic_0000001160467838_row3108132254714"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.2.1"><p id="drs_11_0053__en-us_topic_0000001160467838_p1710810224473"><strong id="drs_11_0053__en-us_topic_0000001160467838_b1692404613473">Description</strong></p>
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<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.2.1 "><p id="drs_11_0053__p1914235652214">The <span class="parmname" id="drs_11_0053__parmname11142155616222"><b>max_wal_senders</b></span> value of the source database must be greater than the number of used replication slots. Otherwise, the synchronization may fail.</p>
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<tr id="drs_11_0053__en-us_topic_0000001160467838_row212432224711"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.3.1"><p id="drs_11_0053__en-us_topic_0000001160467838_p1412462211472">Failure Cause and Handling Suggestion</p>
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<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.3.1 "><p id="drs_11_0053__p1414319565225">Failure cause: The <span class="parmname" id="drs_11_0053__parmname1255191417"><b>max_wal_senders</b></span> value of the source database is less than or equal to the number of used replication slots.</p>
<p id="drs_11_0053__p19143656172214">Handling suggestion: Set <span class="parmname" id="drs_11_0053__parmname19143175612221"><b>max_wal_senders</b></span> to a value greater than the number of used replication slots and restart the database to apply the changes. Run the following command to query the number of used replication slots in the current database:</p>
<pre class="codeblock" id="drs_11_0053__codeblock20143105612215">select count(1) from pg_replication_slots;</pre>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_12_0008.html">Database Parameters</a></div>
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