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drs_umn

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Reviewed-by: Wagner, Fabian <fabian.wagner@t-systems.com>
Co-authored-by: Ru, Li Yi <liyiru7@huawei.com>
Co-committed-by: Ru, Li Yi <liyiru7@huawei.com>
This commit is contained in:
Ru, Li Yi 2024-05-06 12:37:32 +00:00 committed by zuul
parent 28eafd163b
commit 44a5966759
52 changed files with 1820 additions and 870 deletions
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</li>
<li class="ulchildlink"><strong><a href="drs_01_0200.html">Instructions</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_01_0201.html">Permissions Management</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_01_0318.html">Compliance Description</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_01_0004.html">Related Services</a></strong><br>

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<div class="fignone" id="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0000001102434640_en-us_topic_0171122769_fig2922183194716"><a name="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0000001102434640_en-us_topic_0171122769_fig2922183194716"></a><a name="en-us_topic_0000001205747781_en-us_topic_0000001102434640_en-us_topic_0171122769_fig2922183194716"></a><span class="figcap"><b>Figure 1 </b>Region and AZ</span><br><span><img id="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0000001102434640_image221039023" src="en-us_image_0000001710470628.png"></span></div>
</div>
<div class="section" id="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0172714178_section415012145264"><h4 class="sectiontitle">Project</h4><p id="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0172714178_p1289616261242">A project corresponds to a region. Projects group and isolate resources (including compute, storage, and network resources) across physical regions. Users can be granted permissions in a default project to access all resources in the region associated with the project. If you need more refined access control, create subprojects under a default project and create resources in subprojects. Then you can assign users the permissions required to access only the resources in the specific subprojects.</p>
<div class="fignone" id="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0172714178_fig1032520265332"><span class="figcap"><b>Figure 2 </b>Project isolating model</span><br><span><img id="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0172714178_image1732632614336" src="en-us_image_0000001710470624.gif"></span></div>
<div class="fignone" id="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0172714178_fig1032520265332"><span class="figcap"><b>Figure 2 </b>Project isolating model</span><br><span><img id="drs_01_0005__image044111113320" src="en-us_image_0000001862537477.png"></span></div>
</div>
<div class="section" id="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0000001102434640_section13642481187"><h4 class="sectiontitle">Account Entrustment</h4><p id="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0000001102434640_p4627484188">DRS will <span class="keyword" id="drs_01_0005__en-us_topic_0000001205747781_keyword1989095518195">entrust your account to the administrator</span> to implement some functions. For example, if you enable scheduled startup tasks, DRS will automatically entrust your account to DRS administrator <strong id="drs_01_0005__en-us_topic_0000001205747781_b1817811158142">op_svc_rds</strong> during the task creation to implement automated management on the scheduled tasks.</p>
<p id="drs_01_0005__en-us_topic_0000001205747781_en-us_topic_0000001102434640_p106272814181">Account entrustment can be implemented in the same region only.</p>

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</td>
<td class="cellrowborder" valign="top" width="35.63%" headers="mcps1.3.4.3.2.5.1.2 "><p id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_p999215478583">PostgreSQL-&gt;PostgreSQL</p>
</td>
<td class="cellrowborder" valign="top" width="24.86%" headers="mcps1.3.4.3.2.5.1.3 "><ul id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_ul1175634214217"><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li27561542182116">PostgreSQL 9.4.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li1756184216215">PostgreSQL 9.5.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li875684215213">PostgreSQL 9.6.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li47565427212">PostgreSQL 10.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li157577428213">PostgreSQL 11.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li475704282114">PostgreSQL 12.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_li279573613817">PostgreSQL 13.x</li></ul>
<td class="cellrowborder" valign="top" width="24.86%" headers="mcps1.3.4.3.2.5.1.3 "><ul id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_ul1175634214217"><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li27561542182116">PostgreSQL 9.4.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li1756184216215">PostgreSQL 9.5.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li875684215213">PostgreSQL 9.6.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li47565427212">PostgreSQL 10.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li157577428213">PostgreSQL 11.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li475704282114">PostgreSQL 12.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_li279573613817">PostgreSQL 13.x</li><li id="drs_01_0302__li2022014481711">PostgreSQL 14.x</li></ul>
</td>
<td class="cellrowborder" valign="top" width="30.570000000000004%" headers="mcps1.3.4.3.2.5.1.4 "><ul id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_ul12562102702213"><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li1056315271228">PostgreSQL 9.5.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li4563162772217">PostgreSQL 9.6.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li19563327122213">PostgreSQL 10.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li256392720228">PostgreSQL 11.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li1756352742211">PostgreSQL 12.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_li20337731488">PostgreSQL 13.x</li></ul>
<td class="cellrowborder" valign="top" width="30.570000000000004%" headers="mcps1.3.4.3.2.5.1.4 "><ul id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_ul12562102702213"><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li1056315271228">PostgreSQL 9.5.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li4563162772217">PostgreSQL 9.6.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li19563327122213">PostgreSQL 10.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li256392720228">PostgreSQL 11.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li1756352742211">PostgreSQL 12.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_li20337731488">PostgreSQL 13.x</li><li id="drs_01_0302__li5113357113">PostgreSQL 14.x</li></ul>
</td>
</tr>
<tr id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_row2017520463151"><td class="cellrowborder" valign="top" width="8.94%" headers="mcps1.3.4.3.2.5.1.1 "><p id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_p18960142662120">To the cloud</p>
</td>
<td class="cellrowborder" valign="top" width="35.63%" headers="mcps1.3.4.3.2.5.1.2 "><p id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_p145659536154">Oracle-&gt;PostgreSQL</p>
</td>
<td class="cellrowborder" valign="top" width="24.86%" headers="mcps1.3.4.3.2.5.1.3 "><ul id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_ul1956675371518"><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li145661553121513">Oracle 10g</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li756612535155">Oracle 11g</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li205661253161511">Oracle 12c</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li1656713533153">Oracle 18c</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li205675532155">Oracle 19c</li></ul>
<td class="cellrowborder" valign="top" width="24.86%" headers="mcps1.3.4.3.2.5.1.3 "><ul id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_ul1956675371518"><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li145661553121513">Oracle 10g</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li756612535155">Oracle 11g</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li205661253161511">Oracle 12c</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li1656713533153">Oracle 18c</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li205675532155">Oracle 19c</li><li id="drs_01_0302__li655605311363">Oracle 21c</li></ul>
</td>
<td class="cellrowborder" valign="top" width="30.570000000000004%" headers="mcps1.3.4.3.2.5.1.4 "><ul id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_ul15786103141620"><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li15796113541610">PostgreSQL 9.5.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li179613551613">PostgreSQL 9.6.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li87961235201620">PostgreSQL 10.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li1879733518166">PostgreSQL 11.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li9419143181820">PostgreSQL 12.x</li></ul>
<td class="cellrowborder" valign="top" width="30.570000000000004%" headers="mcps1.3.4.3.2.5.1.4 "><ul id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_ul15786103141620"><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li15796113541610">PostgreSQL 9.5.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li179613551613">PostgreSQL 9.6.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li87961235201620">PostgreSQL 10.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li1879733518166">PostgreSQL 11.x</li><li id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_li9419143181820">PostgreSQL 12.x</li><li id="drs_01_0302__li181351561826">PostgreSQL 13.x</li><li id="drs_01_0302__li108261731729">PostgreSQL 14.x</li></ul>
</td>
</tr>
<tr id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_en-us_topic_0000001149354299_row12822112725317"><td class="cellrowborder" valign="top" width="8.94%" headers="mcps1.3.4.3.2.5.1.1 "><p id="drs_01_0302__en-us_topic_0000001205627793_en-us_topic_0000001193299771_p1282334552110">From the cloud</p>

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<h1 class="topictitle1">Preparations</h1>
<div id="body0000001160799616"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="drs_02_0471.html">Overview</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_08_0010.html">Permissions Management</a></strong><br>
</li>
</ul>
</div>

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<h1 class="topictitle1">Overview</h1>
<div id="body0000001206278119"><p id="drs_02_0471__p8060118">Before creating a DRS task, make preparations given in the following table to meet the environment requirements.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_02_0471__table111079392434" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Preparations</caption><thead align="left"><tr id="drs_02_0471__row171081739124320"><th align="left" class="cellrowborder" valign="top" width="12.85%" id="mcps1.3.2.2.4.1.1"><p id="drs_02_0471__p910853914310">Item</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="33.79%" id="mcps1.3.2.2.4.1.2"><p id="drs_02_0471__p3108163912434">Description</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="53.36%" id="mcps1.3.2.2.4.1.3"><p id="drs_02_0471__p201086391431">Reference</p>
</th>
</tr>
</thead>
<tbody><tr id="drs_02_0471__row1310813974315"><td class="cellrowborder" valign="top" width="12.85%" headers="mcps1.3.2.2.4.1.1 "><p id="drs_02_0471__p4108193914437">Account</p>
</td>
<td class="cellrowborder" valign="top" width="33.79%" headers="mcps1.3.2.2.4.1.2 "><p id="drs_02_0471__p01085392432">Prepare an account, create a user, and grant permissions to the user to use DRS.</p>
</td>
<td class="cellrowborder" valign="top" width="53.36%" headers="mcps1.3.2.2.4.1.3 "><p id="drs_02_0471__p135111249469">If you do not have an account, register an account on the official website. Then, create a user and grant permissions to the user by referring to <a href="drs_08_0010.html">Permissions Management</a>.</p>
</td>
</tr>
<tr id="drs_02_0471__row410833917433"><td class="cellrowborder" valign="top" width="12.85%" headers="mcps1.3.2.2.4.1.1 "><p id="drs_02_0471__p16108939164311">Database</p>
</td>
<td class="cellrowborder" valign="top" width="33.79%" headers="mcps1.3.2.2.4.1.2 "><p id="drs_02_0471__p1310813914316">Prepare the source and destination databases with required user permissions.</p>
</td>
<td class="cellrowborder" valign="top" width="53.36%" headers="mcps1.3.2.2.4.1.3 "><p id="drs_02_0471__p410819397439">Different data flow types require different databases and permissions. Select a specific data flow type and view the related notes in this document.</p>
</td>
</tr>
<tr id="drs_02_0471__row162741644175019"><td class="cellrowborder" valign="top" width="12.85%" headers="mcps1.3.2.2.4.1.1 "><p id="drs_02_0471__p11274194425011">Network</p>
</td>
<td class="cellrowborder" valign="top" width="33.79%" headers="mcps1.3.2.2.4.1.2 "><p id="drs_02_0471__p727464405010">Before the migration, learn about the application scenarios and the supported network types.</p>
</td>
<td class="cellrowborder" valign="top" width="53.36%" headers="mcps1.3.2.2.4.1.3 "><p id="drs_02_0471__p438919328553">DRS supports migration through the public network, VPC, VPN, and Direct Connect.</p>
<ul id="drs_02_0471__ul5789192781515"><li id="drs_02_0471__li3789182751514">VPC is suitable for migrations of cloud databases in the same region.</li><li id="drs_02_0471__li7789152719158">VPN and Direct Connect are suitable for migrations from on-premises databases to cloud databases or between cloud databases across regions.</li><li id="drs_02_0471__li87894275153">Public network is suitable for migrations from on-premises databases or external cloud databases to destination databases.<p id="drs_02_0471__p11146173413153"><a name="drs_02_0471__li87894275153"></a><a name="li87894275153"></a>You need to configure network settings based on your service requirements.</p>
</li></ul>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_02_0470.html">Preparations</a></div>
</div>
</div>

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<h1 class="topictitle1">Processing Data</h1>
<div id="body1577764089126"><p id="drs_03_0035__p1283617456125">DRS processes synchronized objects and allows you to add rules for selected objects. The processing rules supported by each data flow type are different.</p>
<div class="section" id="drs_03_0035__section13370112713359"><h4 class="sectiontitle">Adding Additional Columns</h4><ol id="drs_03_0035__ol21380317351"><li id="drs_03_0035__li5138531143517"><span>On the <strong id="drs_03_0035__b153762515180">Processing Data</strong> page, click <strong id="drs_03_0035__b1537755118189">Additional Columns</strong>, locate the table to be processed, and click <strong id="drs_03_0035__b037885191816">Add</strong> in the <strong id="drs_03_0035__b53807519183">Operation</strong> column.</span></li><li id="drs_03_0035__li1476210340115"><span>In the displayed <strong id="drs_03_0035__b1055191371915">Add</strong> dialog box, specify the column name, operation type, and field type. Click <strong id="drs_03_0035__b171681715131911">OK</strong>.</span><p><div class="note" id="drs_03_0035__note5138173113513"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_03_0035__ul12138831153516"><li id="drs_03_0035__li1413883193519">In many-to-one mapping scenarios, additional columns for data processing are required to avoid data conflicts.</li><li id="drs_03_0035__li76370845616">The following operation types are supported:<ul id="drs_03_0035__ul18738812100"><li id="drs_03_0035__li51065368018"><strong id="drs_03_0035__b787022314193">Default</strong>: Use the default value to fill in the new column.</li><li id="drs_03_0035__li118294519918">Use the create_time column and update_time column as an example to fill the new column with the data creation time and data update time.</li><li id="drs_03_0035__li10284162061214"><strong id="drs_03_0035__b1181811282195">Expression</strong>: indicates that you need to fill the new column with an expression.</li><li id="drs_03_0035__li3139231163517">If you fill in the new column in <strong id="drs_03_0035__b539072816101944">serverName@database@table</strong> format, you need to enter a server name and then the database name and table name will be automatically filled in.</li><li id="drs_03_0035__li1373554311419"><strong id="drs_03_0035__b385236050101944">Value</strong>: Select a value, for example, synchronization time.</li></ul>
</li><li id="drs_03_0035__li013993123512">You can apply the additional column information of the first editable table to all editable tables in batches.</li><li id="drs_03_0035__li1139631163519">During MySQL to GaussDB(for MySQL) primary/standby synchronization, if the number of columns in a single table exceeds 500, the number of additional columns added to the table may exceed the upper limit. As a result, the task fails.</li></ul>
</div></div>
</p></li><li id="drs_03_0035__li513916312358"><span>Click <strong id="drs_03_0035__b500860634">Next</strong>.</span></li></ol>
</div>
<div id="body1577764089126"><p id="drs_03_0035__p1283617456125">DRS processes synchronized objects and allows you to add rules for selected objects. </p>
<div class="section" id="drs_03_0035__section128621051103514"><h4 class="sectiontitle">Filtering Data</h4><div class="p" id="drs_03_0035__p1787815493518">After a data filtering rule is added, update the source database to ensure data consistency. For example:<ul id="drs_03_0035__ul1887819542357"><li id="drs_03_0035__li198781354163517">The filter criteria are met after the update. You need to continue the synchronization and perform the same update operation on the destination database. If no data is matched, the operation will be ignored, causing data inconsistency.</li><li id="drs_03_0035__li10878954113513">The filter criteria are not met after the update. You need to continue the synchronization and perform the same update operation on the destination database.</li></ul>
</div>
<ol id="drs_03_0035__ol13878115433518"><li id="drs_03_0035__li168781454183512"><span>On the <strong id="drs_03_0035__b27872057101916">Processing Data</strong> page, set <strong id="drs_03_0035__b6548174932010">Processing Type</strong> to <strong id="drs_03_0035__b13209134632012">Data filtering</strong>.</span></li><li id="drs_03_0035__li8879195413519"><span>In the <strong id="drs_03_0035__b16664730288">Object</strong> area, select the table to be processed.</span></li><li id="drs_03_0035__li1187915541350"><span>In the <strong id="drs_03_0035__b2643719694">Filtering Criteria</strong> area, enter the filter criteria (only the part after WHERE in the SQL statement, for example, id=1), and click <strong id="drs_03_0035__b875612782511">Verify</strong>.</span><p><div class="note" id="drs_03_0035__note287914547358"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_03_0035__ul287925413515"><li id="drs_03_0035__li1687945453512">Each table has only one verification rule.</li><li id="drs_03_0035__li78791654173515">Up to 500 tables can be filtered at a time.</li><li id="drs_03_0035__li6827195172817">The filter expression cannot use the package, function, variable, or constant of a specific DB engine. It must comply with the general SQL standard. Enter the part following WHERE in the SQL statement (excluding WHERE and semicolons), for example, sid &gt; 3 and sname like "G %". A maximum of 512 characters are allowed.</li><li id="drs_03_0035__li3740191616122">In SQL statements for setting filter criteria, keywords must be enclosed in backquotes, and the value of <strong id="drs_03_0035__b1462174623514">datatime</strong> (including date and time) must be enclosed in single quotation marks, for example, `update` &gt; '2022-07-13 00:00:00' and age &gt;10.</li><li id="drs_03_0035__li982712522814">Filter criteria cannot be configured for large objects, such as CLOB, BLOB, and BYTEA.</li><li id="drs_03_0035__li14827253285">You are not advised to set filter criteria for fields of approximate numeric types, such as FLOAT, DECIMAL, and DOUBLE.</li><li id="drs_03_0035__li1482718513285">Do not use fields containing special characters as a filter condition.</li><li id="drs_03_0035__li188271456281">You are not advised to use non-idempotent expressions or functions as data processing conditions, such as SYSTIMESTAMP and SYSDATE, because the returned result may be different each time the function is called.</li></ul>
</div></div>
</p></li><li id="drs_03_0035__li1088085411352"><span>After the verification is successful, click <strong id="drs_03_0035__b1966041422101944">Generate Processing Rule</strong>. The rule is displayed.</span></li><li id="drs_03_0035__li118801254183513"><span>Click <strong id="drs_03_0035__b143364992">Next</strong>.</span></li></ol>
</p></li><li id="drs_03_0035__li1088085411352"><span>After the verification is successful, click <strong id="drs_03_0035__b1966041422101944">Generate Processing Rule</strong>. The rule is displayed.</span></li><li id="drs_03_0035__li118801254183513"><span>Click <strong id="drs_03_0035__b451783250">Next</strong>.</span></li></ol>
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<div class="section" id="drs_03_0035__section117931959173518"><h4 class="sectiontitle">Advanced Settings for Data Filtering</h4><p id="drs_03_0035__p1193721615425">If you need to query an association table, you can use the advanced settings of data processing.</p>
<ol id="drs_03_0035__ol13653109193814"><li id="drs_03_0035__li465315963817"><span>On the <strong id="drs_03_0035__b963866929">Processing Data</strong> page, set <strong id="drs_03_0035__b617614603">Processing Type</strong> to <strong id="drs_03_0035__b1082493295">Data filtering</strong>.</span></li><li id="drs_03_0035__li206538963815"><span>In the <strong id="drs_03_0035__b745820309">Object</strong> area, select the table to be processed.</span></li><li id="drs_03_0035__li86533923817"><a name="drs_03_0035__li86533923817"></a><a name="li86533923817"></a><span>In the <strong id="drs_03_0035__b736289324101944">Filtering Criteria</strong> area, specify the filtering criteria, for example, id1 in (select id from db1.tab1 where id &gt;=3 and id &lt;10), and click <strong id="drs_03_0035__b1977500586101944">Verify</strong>.</span><p><div class="note" id="drs_03_0035__note1165310913389"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_03_0035__ul136530913385"><li id="drs_03_0035__li1865359193812">Each table has only one verification rule.</li><li id="drs_03_0035__li166531398383">Up to 500 tables can be filtered at a time.</li><li id="drs_03_0035__li12923986299">The filter expression cannot use the package, function, variable, or constant of a specific DB engine. It must comply with the general SQL standard. Enter the part following WHERE in the SQL statement (excluding WHERE and semicolons), for example, sid &gt; 3 and sname like "G %". A maximum of 512 characters are allowed.</li><li id="drs_03_0035__li192154358303">Filter criteria cannot be configured for large objects, such as CLOB, BLOB, and BYTEA.</li><li id="drs_03_0035__li17216123512300">You are not advised to set filter criteria for fields of approximate numeric types, such as FLOAT, DECIMAL, and DOUBLE.</li><li id="drs_03_0035__li1521710359307">Do not use fields containing special characters as a filter condition.</li><li id="drs_03_0035__li43414202613">You are not advised to use non-idempotent expressions or functions as data processing conditions, such as SYSTIMESTAMP and SYSDATE, because the returned result may be different each time the function is called.</li></ul>
<ol id="drs_03_0035__ol13653109193814"><li id="drs_03_0035__li465315963817"><span>On the <strong id="drs_03_0035__b770925783">Processing Data</strong> page, set <strong id="drs_03_0035__b316773922">Processing Type</strong> to <strong id="drs_03_0035__b217902726">Data filtering</strong>.</span></li><li id="drs_03_0035__li206538963815"><span>In the <strong id="drs_03_0035__b626062044">Object</strong> area, select the table to be processed.</span></li><li id="drs_03_0035__li86533923817"><a name="drs_03_0035__li86533923817"></a><a name="li86533923817"></a><span>In the <strong id="drs_03_0035__b736289324101944">Filtering Criteria</strong> area, specify the filtering criteria, for example, id1 in (select id from db1.tab1 where id &gt;=3 and id &lt;10), and click <strong id="drs_03_0035__b1977500586101944">Verify</strong>.</span><p><div class="note" id="drs_03_0035__note1165310913389"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_03_0035__ul136530913385"><li id="drs_03_0035__li1865359193812">Each table has only one verification rule.</li><li id="drs_03_0035__li166531398383">Up to 500 tables can be filtered at a time.</li><li id="drs_03_0035__li12923986299">The filter expression cannot use the package, function, variable, or constant of a specific DB engine. It must comply with the general SQL standard. Enter the part following WHERE in the SQL statement (excluding WHERE and semicolons), for example, sid &gt; 3 and sname like "G %". A maximum of 512 characters are allowed.</li><li id="drs_03_0035__li192154358303">Filter criteria cannot be configured for large objects, such as CLOB, BLOB, and BYTEA.</li><li id="drs_03_0035__li17216123512300">You are not advised to set filter criteria for fields of approximate numeric types, such as FLOAT, DECIMAL, and DOUBLE.</li><li id="drs_03_0035__li1521710359307">Do not use fields containing special characters as a filter condition.</li><li id="drs_03_0035__li43414202613">You are not advised to use non-idempotent expressions or functions as data processing conditions, such as SYSTIMESTAMP and SYSDATE, because the returned result may be different each time the function is called.</li></ul>
</div></div>
</p></li><li id="drs_03_0035__li765318911383"><span>After the verification is successful, click <strong id="drs_03_0035__b2129402859101944">Generate Processing Rule</strong>. The rule is displayed.</span></li><li id="drs_03_0035__li12654292385"><a name="drs_03_0035__li12654292385"></a><a name="li12654292385"></a><span>In the <strong id="drs_03_0035__b909110785101944">Advanced Settings</strong> area, specify the configuration condition and rule for the association table to help you filter data.</span><p><ol type="a" id="drs_03_0035__ol206541996389"><li id="drs_03_0035__li106542943814">In the <strong id="drs_03_0035__b642929491101944">Configuration Condition</strong> area, enter the association table information entered in <a href="#drs_03_0035__li86533923817">3</a>.<p id="drs_03_0035__p1265411915386"><strong id="drs_03_0035__b1127263828101944">Database Name</strong>, <strong id="drs_03_0035__b2096460836101944">Table Name</strong>, <strong id="drs_03_0035__b1194506330101944">Column Name</strong>, <strong id="drs_03_0035__b677236111101944">Primary Key</strong>, <strong id="drs_03_0035__b1851364574101944">Index</strong>, and <strong id="drs_03_0035__b962234725101944">Filter Criteria</strong> are mandatory. If the table does not have an index, enter its primary key.</p>
<p id="drs_03_0035__p76547963811"><strong id="drs_03_0035__b412492581101944">Filter Criteria</strong> is the filter condition of the association table information entered in <a href="#drs_03_0035__li86533923817">3</a>.</p>
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</li></ol>
</p></li><li id="drs_03_0035__li965411918385"><span>Click <strong id="drs_03_0035__b28454165327">Next</strong>.</span></li></ol>
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<div class="section" id="drs_03_0035__section4452318191910"><h4 class="sectiontitle">Processing Columns</h4><ol id="drs_03_0035__ol164851221151910"><li id="drs_03_0035__li348572111194"><span>On the <strong id="drs_03_0035__b196641546195511">Process Data</strong> page, select <strong id="drs_03_0035__b5719152313554">Processing Columns</strong>.</span></li><li id="drs_03_0035__li84861215199"><span>In the <strong id="drs_03_0035__b994529456">Object</strong> area, select the objects to be processed.</span></li><li id="drs_03_0035__li748611213191"><span>Click <strong id="drs_03_0035__b7418848135318">Edit</strong> to the right of the selected object.</span></li><li id="drs_03_0035__li848617216193"><span>In the <strong id="drs_03_0035__b147682824517">Edit Column</strong> dialog box, select the columns to be mapped and enter new column names.</span><p><div class="note" id="drs_03_0035__note4147165873314"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_03_0035__ul1414795810334"><li id="drs_03_0035__li141471158163315">You can query or filter columns or create new column names.</li><li id="drs_03_0035__li414785811332">After the column name is edited, the column name of the destination database is changed to the new name.</li><li id="drs_03_0035__li414718589333">The new column name cannot be the same as the original column name or an existing column name.</li><li id="drs_03_0035__li3148135812332">The column name in the synchronized table cannot be modified.</li><li id="drs_03_0035__li9148145820334">Only the selected columns can be synchronized.</li><li id="drs_03_0035__li122481236151718">MySQL to MySQL and MySQL to GaussDB(for MySQL) primary/standby synchronizations do not support column mapping based on the partitioning column of a partitioned table.</li></ul>
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</p></li><li id="drs_03_0035__li348613213196"><span>Click <strong id="drs_03_0035__b13684335818">Confirm</strong>.</span></li><li id="drs_03_0035__li15488192111199"><span>Click <strong id="drs_03_0035__b188359451585">Next</strong>.</span></li></ol>
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<div class="section" id="drs_03_0035__section1558714972414"><h4 class="sectiontitle">Viewing Data Filtering Results</h4><ol id="drs_03_0035__ol187795215257"><li id="drs_03_0035__li67794217259"><span>In the task list, click the task to be processed.</span></li><li id="drs_03_0035__li77798218258"><span>Click the <strong id="drs_03_0035__b12441229192913">Process Data</strong> tab to view data filtering records. Click <span><img id="drs_03_0035__image1077942119256" src="en-us_image_0000001758430197.png"></span> in the upper right corner to refresh the record list.</span></li></ol>
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<div class="section" id="drs_03_0035__section10112163911412"><h4 class="sectiontitle">View Column Processing</h4><ol id="drs_03_0035__ol1112239246"><li id="drs_03_0035__li1911353919417"><span>On the task management page, click the target task name in the <strong id="drs_03_0035__b3353164114284">Task Name/ID</strong> column.</span></li><li id="drs_03_0035__li171137391549"><span>In the navigation pane on the left, choose <strong id="drs_03_0035__b8145546122920">Synchronization Mapping</strong>. In the upper right corner, and select <strong id="drs_03_0035__b6855102983011">Columns</strong> to view column mapping records. Click <span><img id="drs_03_0035__image8587124212167" src="en-us_image_0000001710630596.png"></span> in the upper right corner to refresh the record list.</span></li></ol>
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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>
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<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__b965705398">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__b2137996357">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>
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</p></li><li id="drs_03_1118__li156181611171717"><span>On the <strong id="drs_03_1118__b6028155643044">Process Data</strong> page, set the filtering rules for data processing.</span><p><ul id="drs_03_1118__ul6618011171719"><li id="drs_03_1118__li1161841111713">If you do not need to set a processing rule, select <strong id="drs_03_1118__b127801612943044">No processing</strong> and click <strong id="drs_03_1118__b17818024043044">Next</strong>.</li><li id="drs_03_1118__li461916117174">If you need to set data processing rules, configure related filtering rules by referring to <a href="drs_03_0035.html">Processing Data</a>.</li></ul>
</p></li><li id="drs_03_1118__li1361911121710"><span>On the <span class="uicontrol" id="drs_03_1118__uicontrol2090135914129"><b>Check Task</b></span> page, check the synchronization task.</span><p><ul id="drs_03_1118__ul16620911141713"><li id="drs_03_1118__li12620811151718">If any check fails, review the cause and rectify the fault. After the fault is rectified, click <strong id="drs_03_1118__b51770582543246">Check Again</strong>.</li><li id="drs_03_1118__li162016116178">If all check items are successful, click <span class="uicontrol" id="drs_03_1118__uicontrol198478198043246"><b>Next</b></span>.<div class="note" id="drs_03_1118__note9621161121718"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="drs_03_1118__p18621711121716">You can proceed to the next step only when all checks are successful. If there are any items that require confirmation, view and confirm the details first before proceeding to the next step.</p>
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</li></ul>
</p></li><li id="drs_03_1118__li11621611151719"><span>On the displayed page, specify <strong id="drs_03_1118__drs_04_0102_b71367442469">Start Time</strong>, confirm that the configured information is correct, and click <strong id="drs_03_1118__drs_04_0102_b9844152313486">Submit</strong> to submit the task.</span><p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_03_1118__drs_04_0102_table179101030984" frame="border" border="1" rules="all"><caption><b>Table 8 </b>Task startup settings</caption><thead align="left"><tr id="drs_03_1118__drs_04_0102_row1391043015814"><th align="left" class="cellrowborder" valign="top" width="18.42%" id="mcps1.3.5.2.6.2.1.2.3.1.1"><p id="drs_03_1118__drs_04_0102_p1391015304812">Parameter</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_03_1118__drs_04_0102_table179101030984" frame="border" border="1" rules="all"><caption><b>Table 8 </b>Task startup settings</caption><thead align="left"><tr id="drs_03_1118__drs_04_0102_row1391043015814"><th align="left" class="cellrowborder" valign="top" width="18.42%" id="mcps1.3.5.2.7.2.1.2.3.1.1"><p id="drs_03_1118__drs_04_0102_p1391015304812">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="81.58%" id="mcps1.3.5.2.6.2.1.2.3.1.2"><p id="drs_03_1118__drs_04_0102_p1911203019815">Description</p>
<th align="left" class="cellrowborder" valign="top" width="81.58%" id="mcps1.3.5.2.7.2.1.2.3.1.2"><p id="drs_03_1118__drs_04_0102_p1911203019815">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="drs_03_1118__drs_04_0102_row2091163011811"><td class="cellrowborder" valign="top" width="18.42%" headers="mcps1.3.5.2.6.2.1.2.3.1.1 "><p id="drs_03_1118__drs_04_0102_p129112301888">Started Time</p>
<tbody><tr id="drs_03_1118__drs_04_0102_row2091163011811"><td class="cellrowborder" valign="top" width="18.42%" headers="mcps1.3.5.2.7.2.1.2.3.1.1 "><p id="drs_03_1118__drs_04_0102_p129112301888">Started Time</p>
</td>
<td class="cellrowborder" valign="top" width="81.58%" headers="mcps1.3.5.2.6.2.1.2.3.1.2 "><p id="drs_03_1118__drs_04_0102_p1941763313610">Set <strong id="drs_03_1118__drs_04_0102_b1398816557139">Start Time</strong> to <strong id="drs_03_1118__drs_04_0102_b10988145520134">Start upon task creation</strong> or <strong id="drs_03_1118__drs_04_0102_b1398915551317">Start at a specified time</strong> based on site requirements.</p>
<td class="cellrowborder" valign="top" width="81.58%" headers="mcps1.3.5.2.7.2.1.2.3.1.2 "><p id="drs_03_1118__drs_04_0102_p1941763313610">Set <strong id="drs_03_1118__drs_04_0102_b1398816557139">Start Time</strong> to <strong id="drs_03_1118__drs_04_0102_b10988145520134">Start upon task creation</strong> or <strong id="drs_03_1118__drs_04_0102_b1398915551317">Start at a specified time</strong> based on site requirements.</p>
<div class="note" id="drs_03_1118__drs_04_0102_note139210501215"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="drs_03_1118__drs_04_0102_p190916507361">After a synchronization task is started, the performance of the source and destination databases may be affected. You are advised to start a synchronization task during off-peak hours.</p>
</div></div>
</td>

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</li>
<li class="ulchildlink"><strong><a href="drs_04_0030.html">What Are the Precautions for Migrating Data from an Earlier Version MySQL to MySQL 8.0?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_15_0100.html">What Can I Do When OOM Occurs During the Migration of MongoDB Databases?</a></strong><br>
<li class="ulchildlink"><strong><a href="drs_15_0100.html">What Can I Do When OOM Occurs During the Migration from MongoDB to DDS?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_16_0001.html">How Do I Disable the Balancer?</a></strong><br>
</li>

2
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</th>
</tr>
</thead>
<tbody><tr id="drs_04_0095__row98172391416"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.1.2.2.3.1.1 "><ul id="drs_04_0095__en-us_topic_0000001147220024_en-us_topic_0000001102794420_ul05091027162417"><li id="drs_04_0095__en-us_topic_0000001147220024_en-us_topic_0000001102794420_li1050902722417">On-premises MongoDB (versions 3.2, 3.4, 3.6, 4.0, 4.2, and 4.4)</li><li id="drs_04_0095__en-us_topic_0000001147220024_en-us_topic_0000001102794420_li1050913273244">ECS-hosted MongoDB (versions 3.2, 3.4, 3.6, 4.0, 4.2, and 4.4)</li><li id="drs_04_0095__li19632205665910">Other Cloud MongoDB 3.2, 3.4, 3.6, 4.0, 4.2, and 4.4</li><li id="drs_04_0095__en-us_topic_0000001147220024_en-us_topic_0000001102794420_li95091427122414">DDS DB instances (versions 3.2, 3.4, 4.0, 4.2, and 4.4)</li></ul>
<tbody><tr id="drs_04_0095__row98172391416"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.1.2.2.3.1.1 "><ul id="drs_04_0095__en-us_topic_0000001147220024_en-us_topic_0000001102794420_ul05091027162417"><li id="drs_04_0095__en-us_topic_0000001147220024_en-us_topic_0000001102794420_li1050902722417">On-premises MongoDB (versions 3.2, 3.4, 3.6, 4.0, 4.2, and 4.4)</li><li id="drs_04_0095__en-us_topic_0000001147220024_en-us_topic_0000001102794420_li1050913273244">ECS-hosted MongoDB (versions 3.2, 3.4, 3.6, 4.0, 4.2, and 4.4)</li><li id="drs_04_0095__li19632205665910">Other Cloud MongoDB (versions 3.2, 3.4, 3.6, 4.0, 4.2, and 4.4)</li><li id="drs_04_0095__en-us_topic_0000001147220024_en-us_topic_0000001102794420_li95091427122414">DDS DB instances (versions 3.2, 3.4, 4.0, 4.2, and 4.4)</li></ul>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.1.2.2.3.1.2 "><ul id="drs_04_0095__ul1511621519251"><li id="drs_04_0095__li17116115182516">DDS DB instances (versions 3.4, 4.0, 4.2, and 4.4)<div class="note" id="drs_04_0095__note1841273541416"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="drs_04_0095__p1256681085419">The destination database version must be the same as or later than the source database version.</p>
</div></div>

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@ -295,9 +295,9 @@
</tr>
<tr id="drs_04_0102__row559273214193"><td class="cellrowborder" valign="top" width="16.24%" headers="mcps1.3.5.3.4.2.1.2.3.1.1 "><p id="drs_04_0102__p14592132171916">Synchronization Object</p>
</td>
<td class="cellrowborder" valign="top" width="83.76%" headers="mcps1.3.5.3.4.2.1.2.3.1.2 "><p id="drs_04_0102__p16298637101913">Select <strong id="drs_04_0102__b1956119114169">Tables</strong> or <strong id="drs_04_0102__b1556231111612">Databases</strong> as required.</p>
<td class="cellrowborder" valign="top" width="83.76%" headers="mcps1.3.5.3.4.2.1.2.3.1.2 "><p id="drs_04_0102__p16298637101913">Select <strong id="drs_04_0102__b1956119114169">Tables</strong>, <strong id="drs_04_0102__b72471133184515">Import object file</strong>, or <strong id="drs_04_0102__b1556231111612">Databases</strong> as required.</p>
<ul id="drs_04_0102__ul14298153711196"><li id="drs_04_0102__li1390164719575">If the synchronization objects in source and destination databases have different names, you can map the source object name to the destination one. For details, see <a href="drs_10_0015.html">Mapping Object Names</a>.<p id="drs_04_0102__p5907922242">If the database table name contains characters other than letters, digits, and underscores (_), or the mapped database table name contains hyphens (-) and number signs (#), the name length cannot exceed 42 characters.</p>
</li></ul>
</li><li id="drs_04_0102__li18576304557">For details about how to import an object file, see <a href="drs_10_0402.html">Importing Synchronization Objects</a>.</li></ul>
<div class="note" id="drs_04_0102__en-us_topic_0078078071_note6192135932115"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0102__ul12221742164912"><li id="drs_04_0102__li1422217424493">To quickly select the desired database objects, you can use the search function.</li><li id="drs_04_0102__li10940195064913">If there are changes made to the source databases or objects, click <span><img id="drs_04_0102__image20940105054917" src="en-us_image_0000001758549389.png"></span> in the upper right corner to update the objects to be synchronized.</li></ul>
<ul id="drs_04_0102__ul19601624657"><li id="drs_04_0102__li10479103119262">If the object name contains spaces, the spaces before and after the object name are not displayed. If there are multiple spaces between the object name and the object name, only one space is displayed.</li><li id="drs_04_0102__li01376524218">The name of the selected synchronization object cannot contain spaces.</li></ul>
</div></div>
@ -306,19 +306,20 @@
</tbody>
</table>
</div>
</p></li><li id="drs_04_0102__li445566028"><span>On the <strong id="drs_04_0102__b1380121722810">Process Data</strong> page, set the filtering rules for data processing.</span><p><ul id="drs_04_0102__ul1556164911361"><li id="drs_04_0102__li156349143616">If data processing is not required, click <strong id="drs_04_0102__b53361218213">Next</strong>.</li><li id="drs_04_0102__li175555283619">If data processing is required, select <strong id="drs_04_0102__b66842820175">Data filtering</strong>. For details about how to configure related rules, see <a href="drs_03_0035.html">Processing Data</a>.</li></ul>
</p></li><li id="drs_04_0102__li4311227118055"><span>On the <span class="uicontrol" id="drs_04_0102__uicontrol1179122184613"><b>Check Task</b></span> page, check the synchronization task.</span><p><ul id="drs_04_0102__ul4927900994415"><li id="drs_04_0102__li693508475">If any check fails, review the cause and rectify the fault. After the fault is rectified, click <strong id="drs_04_0102__b51770582543246">Check Again</strong>.</li><li id="drs_04_0102__li103321694719">If all check items are successful, click <span class="uicontrol" id="drs_04_0102__uicontrol198478198043246"><b>Next</b></span>.<div class="note" id="drs_04_0102__note9331116184719"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="drs_04_0102__p1934716174711">You can proceed to the next step only when all checks are successful. If there are any items that require confirmation, view and confirm the details first before proceeding to the next step.</p>
</div></div>
</li></ul>
</p></li><li id="drs_04_0102__li85242059155419"><span>On the displayed page, specify <strong id="drs_04_0102__b71367442469">Start Time</strong>, confirm that the configured information is correct, and click <strong id="drs_04_0102__b9844152313486">Submit</strong> to submit the task.</span><p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_04_0102__table179101030984" frame="border" border="1" rules="all"><caption><b>Table 9 </b>Task startup settings</caption><thead align="left"><tr id="drs_04_0102__row1391043015814"><th align="left" class="cellrowborder" valign="top" width="18.42%" id="mcps1.3.5.3.6.2.1.2.3.1.1"><p id="drs_04_0102__p1391015304812">Parameter</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_04_0102__table179101030984" frame="border" border="1" rules="all"><caption><b>Table 9 </b>Task startup settings</caption><thead align="left"><tr id="drs_04_0102__row1391043015814"><th align="left" class="cellrowborder" valign="top" width="18.42%" id="mcps1.3.5.3.7.2.1.2.3.1.1"><p id="drs_04_0102__p1391015304812">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="81.58%" id="mcps1.3.5.3.6.2.1.2.3.1.2"><p id="drs_04_0102__p1911203019815">Description</p>
<th align="left" class="cellrowborder" valign="top" width="81.58%" id="mcps1.3.5.3.7.2.1.2.3.1.2"><p id="drs_04_0102__p1911203019815">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="drs_04_0102__row2091163011811"><td class="cellrowborder" valign="top" width="18.42%" headers="mcps1.3.5.3.6.2.1.2.3.1.1 "><p id="drs_04_0102__p129112301888">Started Time</p>
<tbody><tr id="drs_04_0102__row2091163011811"><td class="cellrowborder" valign="top" width="18.42%" headers="mcps1.3.5.3.7.2.1.2.3.1.1 "><p id="drs_04_0102__p129112301888">Started Time</p>
</td>
<td class="cellrowborder" valign="top" width="81.58%" headers="mcps1.3.5.3.6.2.1.2.3.1.2 "><p id="drs_04_0102__p1941763313610">Set <strong id="drs_04_0102__b1398816557139">Start Time</strong> to <strong id="drs_04_0102__b10988145520134">Start upon task creation</strong> or <strong id="drs_04_0102__b1398915551317">Start at a specified time</strong> based on site requirements.</p>
<td class="cellrowborder" valign="top" width="81.58%" headers="mcps1.3.5.3.7.2.1.2.3.1.2 "><p id="drs_04_0102__p1941763313610">Set <strong id="drs_04_0102__b1398816557139">Start Time</strong> to <strong id="drs_04_0102__b10988145520134">Start upon task creation</strong> or <strong id="drs_04_0102__b1398915551317">Start at a specified time</strong> based on site requirements.</p>
<div class="note" id="drs_04_0102__note139210501215"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="drs_04_0102__p190916507361">After a synchronization task is started, the performance of the source and destination databases may be affected. You are advised to start a synchronization task during off-peak hours.</p>
</div></div>
</td>

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@ -8,9 +8,9 @@
</th>
</tr>
</thead>
<tbody><tr id="drs_04_0107__row98172391416"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.1.2.2.3.1.1 "><ul id="drs_04_0107__ul12857527155513"><li id="drs_04_0107__li13858132711558">On-premises database (PostgreSQL 9.4, 9.5, 9.6, 10, 11, 12 and 13)</li><li id="drs_04_0107__li1285832765512">ECS database (PostgreSQL 9.4, 9.5, 9.6, 10, 11, 12 and 13)</li><li id="drs_04_0107__li2858122713553">Other cloud database (PostgreSQL 9.4, 9.5, 9.6, 10, 11, 12 and 13)</li><li id="drs_04_0107__li68581327175510">RDS for PostgreSQL (9.5, 9.6, 10, 11, 12, 13)</li></ul>
<tbody><tr id="drs_04_0107__row98172391416"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.1.2.2.3.1.1 "><ul id="drs_04_0107__ul12857527155513"><li id="drs_04_0107__li13858132711558">On-premises database (PostgreSQL 9.4, 9.5, 9.6, 10, 11, 12, 13 and 14)</li><li id="drs_04_0107__li1285832765512">ECS database (PostgreSQL 9.4, 9.5, 9.6, 10, 11, 12, 13 and 14)</li><li id="drs_04_0107__li2858122713553">Other cloud database (PostgreSQL 9.4, 9.5, 9.6, 10, 11, 12, 13 and 14)</li><li id="drs_04_0107__li68581327175510">RDS for PostgreSQL (9.5, 9.6, 10, 11, 12, 13 and 14)</li></ul>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.1.2.2.3.1.2 "><p id="drs_04_0107__p196621271344">RDS for PostgreSQL (9.5, 9.6, 10, 11, 12, 13)</p>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.1.2.2.3.1.2 "><p id="drs_04_0107__p196621271344">RDS for PostgreSQL (9.5, 9.6, 10, 11, 12, 13 and 14)</p>
<div class="note" id="drs_04_0107__note1841273541416"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="drs_04_0107__p23336158155">The major version of the destination database must be the same as or later than that of the source database.</p>
</div></div>
</td>

13
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@ -274,9 +274,9 @@
</tr>
<tr id="drs_04_0117__row559273214193"><td class="cellrowborder" valign="top" width="16.24%" headers="mcps1.3.5.3.4.2.1.2.3.1.1 "><p id="drs_04_0117__p14592132171916">Synchronization Object</p>
</td>
<td class="cellrowborder" valign="top" width="83.76%" headers="mcps1.3.5.3.4.2.1.2.3.1.2 "><p id="drs_04_0117__p16298637101913">Select <strong id="drs_04_0117__b133312875325347">Tables</strong> or <strong id="drs_04_0117__b61360849425347">Databases</strong> as required.</p>
<td class="cellrowborder" valign="top" width="83.76%" headers="mcps1.3.5.3.4.2.1.2.3.1.2 "><p id="drs_04_0117__p16298637101913">Select <strong id="drs_04_0117__b133312875325347">Tables</strong>, <strong id="drs_04_0117__b231124315463">Import object file</strong>, or <strong id="drs_04_0117__b61360849425347">Databases</strong> as required.</p>
<ul id="drs_04_0117__ul14298153711196"><li id="drs_04_0117__li1390164719575">If the synchronization objects in source and destination databases have different names, you can map the source object name to the destination one. For details, see <a href="drs_10_0015.html">Mapping Object Names</a>.<p id="drs_04_0117__p3644560284">If the database table name contains characters other than letters, digits, and underscores (_), or the mapped database table name contains hyphens (-) and number signs (#), the name length cannot exceed 42 characters.</p>
</li></ul>
</li><li id="drs_04_0117__li18576304557">For details about how to import an object file, see <a href="drs_10_0402.html">Importing Synchronization Objects</a>.</li></ul>
<div class="note" id="drs_04_0117__note1437713208504"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_04_0117__drs_04_0102_ul12221742164912"><li id="drs_04_0117__drs_04_0102_li1422217424493">To quickly select the desired database objects, you can use the search function.</li><li id="drs_04_0117__drs_04_0102_li10940195064913">If there are changes made to the source databases or objects, click <span><img id="drs_04_0117__drs_04_0102_image20940105054917" src="en-us_image_0000001758549389.png"></span> in the upper right corner to update the objects to be synchronized.</li></ul>
<ul id="drs_04_0117__drs_04_0102_ul19601624657"><li id="drs_04_0117__drs_04_0102_li10479103119262">If the object name contains spaces, the spaces before and after the object name are not displayed. If there are multiple spaces between the object name and the object name, only one space is displayed.</li><li id="drs_04_0117__drs_04_0102_li01376524218">The name of the selected synchronization object cannot contain spaces.</li></ul>
</div></div>
@ -285,19 +285,20 @@
</tbody>
</table>
</div>
</p></li><li id="drs_04_0117__li445566028"><span>On the <strong id="drs_04_0117__b110699427525347">Process Data</strong> page, set the filtering rules for data processing.</span><p><ul id="drs_04_0117__ul1556164911361"><li id="drs_04_0117__li156349143616">If data processing is not required, click <strong id="drs_04_0117__b68230287025347">Next</strong>.</li><li id="drs_04_0117__li175555283619">If data processing is required, select <strong id="drs_04_0117__b1685722121810">Data filtering</strong>. For details about how to configure related rules, see <a href="drs_03_0035.html">Processing Data</a>.</li></ul>
</p></li><li id="drs_04_0117__li4311227118055"><span>On the <span class="uicontrol" id="drs_04_0117__uicontrol1368378894334"><b>Check Task</b></span> page, check the synchronization task.</span><p><ul id="drs_04_0117__ul4927900994415"><li id="drs_04_0117__li693508475">If any check fails, review the cause and rectify the fault. After the fault is rectified, click <strong id="drs_04_0117__b168996914225347">Check Again</strong>.</li><li id="drs_04_0117__li103321694719">If all check items are successful, click <span class="uicontrol" id="drs_04_0117__uicontrol233151694716"><b>Next</b></span>.<div class="note" id="drs_04_0117__note9331116184719"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="drs_04_0117__p1934716174711">You can proceed to the next step only when all checks are successful. If there are any items that require confirmation, view and confirm the details first before proceeding to the next step.</p>
</div></div>
</li></ul>
</p></li><li id="drs_04_0117__li14977728153117"><span>On the displayed page, specify <strong id="drs_04_0117__drs_04_0102_b71367442469">Start Time</strong>, confirm that the configured information is correct, and click <strong id="drs_04_0117__drs_04_0102_b9844152313486">Submit</strong> to submit the task.</span><p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_04_0117__drs_04_0102_table179101030984" frame="border" border="1" rules="all"><caption><b>Table 8 </b>Task startup settings</caption><thead align="left"><tr id="drs_04_0117__drs_04_0102_row1391043015814"><th align="left" class="cellrowborder" valign="top" width="18.42%" id="mcps1.3.5.3.6.2.1.2.3.1.1"><p id="drs_04_0117__drs_04_0102_p1391015304812">Parameter</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_04_0117__drs_04_0102_table179101030984" frame="border" border="1" rules="all"><caption><b>Table 8 </b>Task startup settings</caption><thead align="left"><tr id="drs_04_0117__drs_04_0102_row1391043015814"><th align="left" class="cellrowborder" valign="top" width="18.42%" id="mcps1.3.5.3.7.2.1.2.3.1.1"><p id="drs_04_0117__drs_04_0102_p1391015304812">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="81.58%" id="mcps1.3.5.3.6.2.1.2.3.1.2"><p id="drs_04_0117__drs_04_0102_p1911203019815">Description</p>
<th align="left" class="cellrowborder" valign="top" width="81.58%" id="mcps1.3.5.3.7.2.1.2.3.1.2"><p id="drs_04_0117__drs_04_0102_p1911203019815">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="drs_04_0117__drs_04_0102_row2091163011811"><td class="cellrowborder" valign="top" width="18.42%" headers="mcps1.3.5.3.6.2.1.2.3.1.1 "><p id="drs_04_0117__drs_04_0102_p129112301888">Started Time</p>
<tbody><tr id="drs_04_0117__drs_04_0102_row2091163011811"><td class="cellrowborder" valign="top" width="18.42%" headers="mcps1.3.5.3.7.2.1.2.3.1.1 "><p id="drs_04_0117__drs_04_0102_p129112301888">Started Time</p>
</td>
<td class="cellrowborder" valign="top" width="81.58%" headers="mcps1.3.5.3.6.2.1.2.3.1.2 "><p id="drs_04_0117__drs_04_0102_p1941763313610">Set <strong id="drs_04_0117__drs_04_0102_b1398816557139">Start Time</strong> to <strong id="drs_04_0117__drs_04_0102_b10988145520134">Start upon task creation</strong> or <strong id="drs_04_0117__drs_04_0102_b1398915551317">Start at a specified time</strong> based on site requirements.</p>
<td class="cellrowborder" valign="top" width="81.58%" headers="mcps1.3.5.3.7.2.1.2.3.1.2 "><p id="drs_04_0117__drs_04_0102_p1941763313610">Set <strong id="drs_04_0117__drs_04_0102_b1398816557139">Start Time</strong> to <strong id="drs_04_0117__drs_04_0102_b10988145520134">Start upon task creation</strong> or <strong id="drs_04_0117__drs_04_0102_b1398915551317">Start at a specified time</strong> based on site requirements.</p>
<div class="note" id="drs_04_0117__drs_04_0102_note139210501215"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="drs_04_0117__drs_04_0102_p190916507361">After a synchronization task is started, the performance of the source and destination databases may be affected. You are advised to start a synchronization task during off-peak hours.</p>
</div></div>
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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="drs_10_0009.html">Editing Synchronization Objects</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_10_0402.html">Importing Synchronization Objects</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_10_0015.html">Mapping Object Names</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_10_0100.html">Viewing Synchronization Mapping Information</a></strong><br>

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</tr>
<tr id="drs_06_0005__drs_04_0102_row559273214193"><td class="cellrowborder" valign="top" width="16.24%" headers="mcps1.3.3.2.4.2.1.2.3.1.1 "><p id="drs_06_0005__drs_04_0102_p14592132171916">Synchronization Object</p>
</td>
<td class="cellrowborder" valign="top" width="83.76%" headers="mcps1.3.3.2.4.2.1.2.3.1.2 "><p id="drs_06_0005__drs_04_0102_p16298637101913">Select <strong id="drs_06_0005__drs_04_0102_b1956119114169">Tables</strong> or <strong id="drs_06_0005__drs_04_0102_b1556231111612">Databases</strong> as required.</p>
<td class="cellrowborder" valign="top" width="83.76%" headers="mcps1.3.3.2.4.2.1.2.3.1.2 "><p id="drs_06_0005__drs_04_0102_p16298637101913">Select <strong id="drs_06_0005__drs_04_0102_b1956119114169">Tables</strong>, <strong id="drs_06_0005__drs_04_0102_b72471133184515">Import object file</strong>, or <strong id="drs_06_0005__drs_04_0102_b1556231111612">Databases</strong> as required.</p>
<ul id="drs_06_0005__drs_04_0102_ul14298153711196"><li id="drs_06_0005__drs_04_0102_li1390164719575">If the synchronization objects in source and destination databases have different names, you can map the source object name to the destination one. For details, see <a href="drs_10_0015.html">Mapping Object Names</a>.<p id="drs_06_0005__drs_04_0102_p5907922242">If the database table name contains characters other than letters, digits, and underscores (_), or the mapped database table name contains hyphens (-) and number signs (#), the name length cannot exceed 42 characters.</p>
</li></ul>
</li><li id="drs_06_0005__drs_04_0102_li18576304557">For details about how to import an object file, see <a href="drs_10_0402.html">Importing Synchronization Objects</a>.</li></ul>
<div class="note" id="drs_06_0005__drs_04_0102_en-us_topic_0078078071_note6192135932115"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="drs_06_0005__drs_04_0102_ul12221742164912"><li id="drs_06_0005__drs_04_0102_li1422217424493">To quickly select the desired database objects, you can use the search function.</li><li id="drs_06_0005__drs_04_0102_li10940195064913">If there are changes made to the source databases or objects, click <span><img id="drs_06_0005__drs_04_0102_image20940105054917" src="en-us_image_0000001758549389.png"></span> in the upper right corner to update the objects to be synchronized.</li></ul>
<ul id="drs_06_0005__drs_04_0102_ul19601624657"><li id="drs_06_0005__drs_04_0102_li10479103119262">If the object name contains spaces, the spaces before and after the object name are not displayed. If there are multiple spaces between the object name and the object name, only one space is displayed.</li><li id="drs_06_0005__drs_04_0102_li01376524218">The name of the selected synchronization object cannot contain spaces.</li></ul>
</div></div>
@ -245,19 +245,20 @@
</tbody>
</table>
</div>
</p></li><li id="drs_06_0005__drs_04_0102_li445566028"><span>On the <strong id="drs_06_0005__drs_04_0102_b1380121722810">Process Data</strong> page, set the filtering rules for data processing.</span><p><ul id="drs_06_0005__drs_04_0102_ul1556164911361"><li id="drs_06_0005__drs_04_0102_li156349143616">If data processing is not required, click <strong id="drs_06_0005__drs_04_0102_b53361218213">Next</strong>.</li><li id="drs_06_0005__drs_04_0102_li175555283619">If data processing is required, select <strong id="drs_06_0005__drs_04_0102_b66842820175">Data filtering</strong>. For details about how to configure related rules, see <a href="drs_03_0035.html">Processing Data</a>.</li></ul>
</p></li><li id="drs_06_0005__drs_04_0102_li4311227118055"><span>On the <span class="uicontrol" id="drs_06_0005__drs_04_0102_uicontrol1179122184613"><b>Check Task</b></span> page, check the synchronization task.</span><p><ul id="drs_06_0005__drs_04_0102_ul4927900994415"><li id="drs_06_0005__drs_04_0102_li693508475">If any check fails, review the cause and rectify the fault. After the fault is rectified, click <strong id="drs_06_0005__drs_04_0102_b51770582543246">Check Again</strong>.</li><li id="drs_06_0005__drs_04_0102_li103321694719">If all check items are successful, click <span class="uicontrol" id="drs_06_0005__drs_04_0102_uicontrol198478198043246"><b>Next</b></span>.<div class="note" id="drs_06_0005__drs_04_0102_note9331116184719"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="drs_06_0005__drs_04_0102_p1934716174711">You can proceed to the next step only when all checks are successful. If there are any items that require confirmation, view and confirm the details first before proceeding to the next step.</p>
</div></div>
</li></ul>
</p></li><li id="drs_06_0005__drs_04_0102_li85242059155419"><span>On the displayed page, specify <strong id="drs_06_0005__drs_04_0102_b71367442469">Start Time</strong>, confirm that the configured information is correct, and click <strong id="drs_06_0005__drs_04_0102_b9844152313486">Submit</strong> to submit the task.</span><p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_06_0005__drs_04_0102_table179101030984" frame="border" border="1" rules="all"><caption><b>Table 7 </b>Task startup settings</caption><thead align="left"><tr id="drs_06_0005__drs_04_0102_row1391043015814"><th align="left" class="cellrowborder" valign="top" width="18.42%" id="mcps1.3.3.2.6.2.1.2.3.1.1"><p id="drs_06_0005__drs_04_0102_p1391015304812">Parameter</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_06_0005__drs_04_0102_table179101030984" frame="border" border="1" rules="all"><caption><b>Table 7 </b>Task startup settings</caption><thead align="left"><tr id="drs_06_0005__drs_04_0102_row1391043015814"><th align="left" class="cellrowborder" valign="top" width="18.42%" id="mcps1.3.3.2.7.2.1.2.3.1.1"><p id="drs_06_0005__drs_04_0102_p1391015304812">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="81.58%" id="mcps1.3.3.2.6.2.1.2.3.1.2"><p id="drs_06_0005__drs_04_0102_p1911203019815">Description</p>
<th align="left" class="cellrowborder" valign="top" width="81.58%" id="mcps1.3.3.2.7.2.1.2.3.1.2"><p id="drs_06_0005__drs_04_0102_p1911203019815">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="drs_06_0005__drs_04_0102_row2091163011811"><td class="cellrowborder" valign="top" width="18.42%" headers="mcps1.3.3.2.6.2.1.2.3.1.1 "><p id="drs_06_0005__drs_04_0102_p129112301888">Started Time</p>
<tbody><tr id="drs_06_0005__drs_04_0102_row2091163011811"><td class="cellrowborder" valign="top" width="18.42%" headers="mcps1.3.3.2.7.2.1.2.3.1.1 "><p id="drs_06_0005__drs_04_0102_p129112301888">Started Time</p>
</td>
<td class="cellrowborder" valign="top" width="81.58%" headers="mcps1.3.3.2.6.2.1.2.3.1.2 "><p id="drs_06_0005__drs_04_0102_p1941763313610">Set <strong id="drs_06_0005__drs_04_0102_b1398816557139">Start Time</strong> to <strong id="drs_06_0005__drs_04_0102_b10988145520134">Start upon task creation</strong> or <strong id="drs_06_0005__drs_04_0102_b1398915551317">Start at a specified time</strong> based on site requirements.</p>
<td class="cellrowborder" valign="top" width="81.58%" headers="mcps1.3.3.2.7.2.1.2.3.1.2 "><p id="drs_06_0005__drs_04_0102_p1941763313610">Set <strong id="drs_06_0005__drs_04_0102_b1398816557139">Start Time</strong> to <strong id="drs_06_0005__drs_04_0102_b10988145520134">Start upon task creation</strong> or <strong id="drs_06_0005__drs_04_0102_b1398915551317">Start at a specified time</strong> based on site requirements.</p>
<div class="note" id="drs_06_0005__drs_04_0102_note139210501215"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="drs_06_0005__drs_04_0102_p190916507361">After a synchronization task is started, the performance of the source and destination databases may be affected. You are advised to start a synchronization task during off-peak hours.</p>
</div></div>
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<a name="drs_08_0010"></a><a name="drs_08_0010"></a>
<h1 class="topictitle1">Permissions Management</h1>
<div id="body8662426"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="drs_08_0012.html">Creating a User and Granting Permissions</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_08_0088.html">Creating a Custom Policy</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_02_0470.html">Preparations</a></div>
</div>
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<a name="drs_08_0012"></a><a name="drs_08_0012"></a>
<h1 class="topictitle1">Creating a User and Granting Permissions</h1>
<div id="en-us_topic_0000001183831354_body8662426"><p id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_p1944133064413">This section describes IAM's fine-grained permissions management for DRS.</p>
<ul id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_ul13953335165415"><li id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li17104164175416">With IAM, you can:<ul id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_ul633893031517"><li id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li1933853091512">Create IAM users for employees based on the organizational structure of your enterprise. Each IAM user has their own security credentials, providing access to DRS resources.</li><li id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li103671143201516">Grant only the permissions required for users to perform a specific task.</li><li id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li933843091519">Entrust an account or cloud service to perform professional and efficient O&amp;M on your DRS resources.</li></ul>
</li></ul>
<p id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_p1777341617">If your account does not require individual IAM users, skip this chapter.</p>
<p id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_p445162045919">This section describes the procedure for granting permissions (see <a href="#drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_fig158351985619">Figure 1</a>).</p>
<div class="section" id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_section64352220313"><h4 class="sectiontitle">Prerequisites</h4><p id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_p1743265211294">Learn about the permissions (see <a href="drs_01_0201.html">Permissions Management</a>) supported by DRS and choose policies or roles according to your requirements. </p>
</div>
<div class="section" id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_section3327121975615"><h4 class="sectiontitle">Process Flow</h4><div class="fignone" id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_fig158351985619"><a name="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_fig158351985619"></a><a name="en-us_topic_0000001183831354_en-us_topic_0000001205509291_fig158351985619"></a><span class="figcap"><b>Figure 1 </b>Process for granting DRS permissions</span><br><span><img id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_image95831519135612" src="en-us_image_0000001358599932.jpg"></span></div>
<ol id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_ol175831219205614"><li id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li1658301914563"><a name="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li1658301914563"></a><a name="en-us_topic_0000001183831354_en-us_topic_0000001205509291_li1658301914563"></a>Create a user group and assign permissions to it.<p id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_p17583191910568"><a name="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li1658301914563"></a><a name="en-us_topic_0000001183831354_en-us_topic_0000001205509291_li1658301914563"></a>Create a user group on the IAM console, and assign the <strong id="drs_08_0012__en-us_topic_0000001183831354_b1928103185916">DRS Administrator</strong> policy to the group.</p>
</li><li id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li10583191911565">Create a user.<p id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_p1558431975618"><a name="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li10583191911565"></a><a name="en-us_topic_0000001183831354_en-us_topic_0000001205509291_li10583191911565"></a>Create a user on the IAM console and add the user to the group created in <a href="#drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li1658301914563">1</a>.</p>
</li><li id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li558417192561">Log in and verify permissions.<p id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_p05841190569"><a name="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_li558417192561"></a><a name="en-us_topic_0000001183831354_en-us_topic_0000001205509291_li558417192561"></a>Log in to the management console using the newly created user, and verify that the user only has read permissions for DRS.</p>
<p id="drs_08_0012__en-us_topic_0000001183831354_en-us_topic_0000001205509291_p134016463379">Go to the DRS console, click <strong id="drs_08_0012__en-us_topic_0000001183831354_b3606192013010">Create Migration Task</strong> in the upper right corner to create a migration task. If a migration task (assume that there is only the <strong id="drs_08_0012__en-us_topic_0000001183831354_b0606920709">DRS Administrator</strong> permission) is created, the <strong id="drs_08_0012__en-us_topic_0000001183831354_b360615201203">DRS Administrator</strong> policy has taken effect.</p>
</li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_08_0010.html">Permissions Management</a></div>
</div>
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<a name="drs_08_0088"></a><a name="drs_08_0088"></a>
<h1 class="topictitle1">Creating a Custom Policy</h1>
<div id="body8662426"><p class="MsoNormal" id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_p10675105311117">Custom policies can be created to supplement the system-defined policies of DRS. </p>
<p id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_p7233955171110">You can create custom policies in either of the following ways:</p>
<ul id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_ul023410556110"><li id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_li823412552112">Visual editor: Select cloud services, actions, resources, and request conditions. This does not require knowledge of policy syntax.</li><li id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_li1723415554114">JSON: Create a policy in JSON format or edit the JSON strings of an existing policy.</li></ul>
<p id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_p1870153144">For details about how to create a custom policy, see Identity and Access Management User Guide. The following describes examples of common DRS custom policies.</p>
<div class="section" id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_en-us_topic_0172661626_section7689721"><h4 class="sectiontitle">Example Custom Policies</h4><ul id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_en-us_topic_0172661626_ul40462633"><li id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_en-us_topic_0172661626_li28619382">Example 1: Allowing users to create DRS instances<pre class="codeblock" id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_codeblock2950151332118">{
"Version": "1.1",
"Statement": [{
"Action": ["drs:instance:create"],
"Effect": "Allow"
}]
}</pre>
</li><li id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_en-us_topic_0172661626_li36468595">Example 2: Denying DRS instance deletion<p id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_en-us_topic_0172661626_p59781901"><a name="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_en-us_topic_0172661626_li36468595"></a><a name="en-us_topic_0000001229309503_en-us_topic_0000001160307860_en-us_topic_0172661626_li36468595"></a>A policy with only "Deny" permissions must be used in conjunction with other policies to take effect. If the permissions assigned to a user contain both "Allow" and "Deny", the "Deny" permissions take precedence over the "Allow" permissions.</p>
<p id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_en-us_topic_0172661626_p1166200">The following method can be used if you need to assign permissions of the <strong id="drs_08_0088__en-us_topic_0000001229309503_b1997081952517">DRS FullAccess</strong> policy to a user but you want to prevent the user from deleting DRS instances. Create a custom policy for denying DRS instance deletion, and attach both policies to the group to which the user belongs. Then, the user can perform all operations on DRS instances except deleting DRS instances. The following is an example of a deny policy:</p>
<pre class="codeblock" id="drs_08_0088__en-us_topic_0000001229309503_en-us_topic_0000001160307860_codeblock154531756192113">{
"Version": "1.1",
"Statement": [{
"Action": ["drs:instance:delete"],
"Effect": "Deny"
}]
}</pre>
</li></ul>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_08_0010.html">Permissions Management</a></div>
</div>
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<h1 class="topictitle1">How Do I Delete Orphaned Documents in MongoDB Sharded Clusters?</h1>
<div id="body8662426"><div class="section" id="drs_09_0101__en-us_topic_0000001205747809_section9909238203913"><h4 class="sectiontitle">What Is Orphaned Document?</h4><p id="drs_09_0101__en-us_topic_0000001205747809_p8060118">In a sharded cluster, orphaned documents are those documents on a shard that also exist in chunks on other shards as a result of failed migrations or incomplete migration cleanup due to abnormal shutdown.</p>
</div>
<div class="section" id="drs_09_0101__en-us_topic_0000001205747809_section1411683158"><h4 class="sectiontitle">Migration Impact</h4><p id="drs_09_0101__en-us_topic_0000001205747809_p63311923131011">During cluster migration, DRS extracts full data from shards. Normal documents and orphaned documents are on different shards and DRS will migrate them all. If the conflict policy of DRS for MongoDB migration is <strong id="drs_09_0101__b1814113710460">Ignore</strong>, documents that are first migrated to the destination are stored, resulting in data inconsistency.</p>
<div class="section" id="drs_09_0101__en-us_topic_0000001205747809_section1411683158"><h4 class="sectiontitle">Migration Impact</h4><p id="drs_09_0101__en-us_topic_0000001205747809_p63311923131011">During cluster migration, DRS extracts full data from shards. Normal documents and orphaned documents are on different shards and DRS will migrate them all. If the conflict policy of DRS migration from MongoDB to DDS is <strong id="drs_09_0101__b1814113710460">Ignore</strong>, documents that are first migrated to the destination are stored, resulting in data inconsistency.</p>
</div>
<div class="section" id="drs_09_0101__en-us_topic_0000001205747809_section13123163021517"><h4 class="sectiontitle">Procedure</h4><ol id="drs_09_0101__en-us_topic_0000001205747809_ol45902262169"><li id="drs_09_0101__en-us_topic_0000001205747809_li137986291495"><span>Contact technical support to obtain the <strong id="drs_09_0101__b12251135153015">cleanupOrphaned</strong> script for deleting orphaned files and decompress the script.</span></li><li id="drs_09_0101__en-us_topic_0000001205747809_li9814142002918"><a name="drs_09_0101__en-us_topic_0000001205747809_li9814142002918"></a><a name="en-us_topic_0000001205747809_li9814142002918"></a><span>Modify the <strong id="drs_09_0101__en-us_topic_0000001205747809_b2195114781219">cleanupOrphaned.js</strong> script file and replace <strong id="drs_09_0101__en-us_topic_0000001205747809_b1851152316135">test</strong> with the database name of the orphaned document to be cleared.</span></li><li id="drs_09_0101__en-us_topic_0000001205747809_li2467154265618"><a name="drs_09_0101__en-us_topic_0000001205747809_li2467154265618"></a><a name="en-us_topic_0000001205747809_li2467154265618"></a><span>Run the following command to clear the orphaned documents of all collections in the specified database on the shard node:</span><p><pre class="screen" id="drs_09_0101__en-us_topic_0000001205747809_screen5467124295613"><strong id="drs_09_0101__b68704517227">mongo --host</strong> <em id="drs_09_0101__i2871251192211">ShardIP</em><strong id="drs_09_0101__b68713515220"> --port</strong> <em id="drs_09_0101__i10871135115225">Primaryport</em> <strong id="drs_09_0101__b2871115122219">--authenticationDatabase</strong> <em id="drs_09_0101__i1387255117222">database</em> <strong id="drs_09_0101__b1487225111226">-u</strong> <em id="drs_09_0101__i198727511223">username</em> <strong id="drs_09_0101__b08722051182213">-p</strong> <em id="drs_09_0101__i11872151102219">passw<em id="drs_09_0101__i1751813598222">o</em>rd</em> cleanupOrphaned.js</pre>
<div class="note" id="drs_09_0101__en-us_topic_0000001205747809_note1047094275615"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_09_0101__en-us_topic_0000001205747809_ul847019420567"><li id="drs_09_0101__en-us_topic_0000001205747809_li847084265613"><strong id="drs_09_0101__en-us_topic_0000001205747809_b2043446148">ShardIP</strong>: indicates the IP address of the shard node.</li><li id="drs_09_0101__en-us_topic_0000001205747809_li104701642205615"><strong id="drs_09_0101__en-us_topic_0000001205747809_b17359121741412">Primaryport</strong>: indicates the service port of the primary shard node.</li><li id="drs_09_0101__en-us_topic_0000001205747809_li44708423562"><strong id="drs_09_0101__en-us_topic_0000001205747809_b49314197145">database</strong>: indicates the database name.</li><li id="drs_09_0101__en-us_topic_0000001205747809_li16470114285611"><strong id="drs_09_0101__en-us_topic_0000001205747809_b0594105491611">username</strong>: indicates the username for logging in to the database.</li><li id="drs_09_0101__en-us_topic_0000001205747809_li547113425568"><strong id="drs_09_0101__en-us_topic_0000001205747809_b14978183141714">password</strong> indicates the password for logging in to the database.</li></ul>

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<a name="drs_10_0402"></a><a name="drs_10_0402"></a>
<h1 class="topictitle1">Importing Synchronization Objects</h1>
<div id="body0000001179910587"><p id="drs_10_0402__p8060118">Real-time synchronization supports the import of objects through files. After a task is created, you can import object files on the <strong id="drs_10_0402__b18870191561411">Set Synchronization Task</strong> page. </p>
<div class="note" id="drs_10_0402__note20738054164915"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_10_0402__ul127396547493"><li id="drs_10_0402__li3739354114910">Only Windows Microsoft Excel 97-2003 (*.xls), 2007, and later (*.xlsx) files can be imported. The downloaded compressed package provides the templates of the two versions.</li><li id="drs_10_0402__li187396541499">The file name can contain only spaces, letters, digits, hyphens (-), underscores (_), and parentheses.</li><li id="drs_10_0402__li17739135404918">The format of the object information in the template must meet the requirements. The value is case-sensitive and cannot include angle brackets (&lt;&gt;), periods (.), and double quotation marks ("). Objects that start or end with a space are not supported.</li><li id="drs_10_0402__li18712125253815">The task in the configuration supports table-level synchronization, database-level synchronization, or file import mode. Each time you switch to a new mode, the selected or imported database objects are cleared, and you need to select or import them again.</li><li id="drs_10_0402__li13739135413497">If you want to import a file for mapping, fill in the first and second columns of the file based on the template. If the first two columns of a row are left blank, the row will be ignored.</li><li id="drs_10_0402__li273945410490">For the task created using the file import mode, database-level and table-level synchronization are not supported after the task is started.</li><li id="drs_10_0402__li1115903383917">If you edit a task, the imported file must contain information about all objects. Importing only the updated objects is not allowed.</li><li id="drs_10_0402__li55413509402">If you edit a task again, the objects that have been synchronized cannot be mapped again. Ensure that the object names remain unchanged after the mapping.</li><li id="drs_10_0402__li1775210543915">If you edit a task again, the exported object information is the synchronized object information.</li><li id="drs_10_0402__li257442984313">If the verification fails after the file is uploaded, click <strong id="drs_10_0402__b1754362231517">View Failure Details</strong> to download the error information.</li><li id="drs_10_0402__li1581212421300">The object names entered in the Excel file must use the same letter case as the source object names.</li></ul>
</div></div>
<div class="section" id="drs_10_0402__section756393912287"><h4 class="sectiontitle">Procedure</h4><ol id="drs_10_0402__ol7492647102917"><li id="drs_10_0402__li1049214718292"><span>On the <strong id="drs_10_0402__b16405351181511">Set Synchronization Task</strong> page, click <span class="uicontrol" id="drs_10_0402__uicontrol948819546433"><b>Import object file</b></span> in the <strong id="drs_10_0402__b2261154371611">Synchronization Object</strong> field.</span></li><li id="drs_10_0402__li3230853114618"><span>Click <strong id="drs_10_0402__b1277027383111229">Download Template</strong>.</span></li><li id="drs_10_0402__li13532958174615"><span>Download the template and enter information about the objects to be imported.</span></li><li id="drs_10_0402__li16984826478"><span>Click <strong id="drs_10_0402__b1835423648111229">Select File</strong>. In the displayed dialog box, select the edited template.</span></li><li id="drs_10_0402__li2050112815471"><span>Click <strong id="drs_10_0402__b1293077205111229">Upload</strong>.</span><p><p id="drs_10_0402__p1395839184717"></p>
</p></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="drs_05_0007.html">Managing Objects</a></div>
</div>
</div>

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</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">Migration from MongoDB to DDS</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 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>
<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>

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</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 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, 19c, or 21c.</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>
<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, 19c, or 21c are supported.</p>
</td>
</tr>
</tbody>

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</table>
</div>
</div>
<div class="section" id="drs_11_0006__en-us_topic_0000001160307844_section1646116017327"><h4 class="sectiontitle">MongoDB to DDS Migration</h4>
<div class="section" id="drs_11_0006__en-us_topic_0000001160307844_section1646116017327"><h4 class="sectiontitle">Migration from MongoDB to DDS</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0006__en-us_topic_0000001160307844_table355611610319" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Checking whether the destination database version is supported</caption><tbody><tr id="drs_11_0006__en-us_topic_0000001160307844_row855671617313"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.1.1"><p id="drs_11_0006__en-us_topic_0000001160307844_p755641663117">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.1.1 "><p id="drs_11_0006__en-us_topic_0000001160307844_p1455610168311">Whether the destination database version is supported</p>
@ -42,13 +42,13 @@
</tr>
<tr id="drs_11_0006__en-us_topic_0000001160307844_row157191643119"><th class="firstcol" valign="top" width="11%" id="mcps1.3.2.2.2.3.2.1"><p id="drs_11_0006__en-us_topic_0000001160307844_p1557151693119">Description</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.2.1 "><p id="drs_11_0006__en-us_topic_0000001160307844_p14571131615315">Check whether the destination database version is MongoDB 3.4.x, 4.0.x, 4.2.x, or 4.4.x.</p>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.2.2.2.3.2.1 "><p id="drs_11_0006__en-us_topic_0000001160307844_p14571131615315">Check whether the destination database version is 3.4.x, 4.0.x, 4.2.x, or 4.4.x.</p>
</td>
</tr>
<tr id="drs_11_0006__en-us_topic_0000001160307844_row95711916153115"><th class="firstcol" rowspan="3" valign="top" width="11%" id="mcps1.3.2.2.2.3.3.1"><p id="drs_11_0006__en-us_topic_0000001160307844_p1357171612314">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_0006__en-us_topic_0000001160307844_p1940135218399">Failure cause: The destination database version is not supported.</p>
<p id="drs_11_0006__en-us_topic_0000001160307844_p1333715113912">Handling suggestion: Check whether the destination database version is MongoDB 3.4.x, 4.0.x, 4.2.x, or 4.4.x.</p>
<p id="drs_11_0006__en-us_topic_0000001160307844_p1333715113912">Handling suggestion: Check whether the destination database version is 3.4.x, 4.0.x, 4.2.x, or 4.4.x.</p>
</td>
</tr>
<tr id="drs_11_0006__en-us_topic_0000001160307844_row13571121603118"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_11_0006__en-us_topic_0000001160307844_p6759115073912">Failure cause: This item cannot be checked because the destination database fails to be connected.</p>

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</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>
<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, 13.0, and 14.0 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>
<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, 13.0, and 14.0 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>
@ -96,7 +96,7 @@
</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">Migration from MongoDB to DDS</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 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>
<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>
@ -115,7 +115,7 @@
</td>
</tr>
<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 4.0.x and the destination database version is 3.4.x.</p>
</td>
</tr>
</tbody>

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</table>
</div>
</div>
<div class="section" id="drs_11_0008__en-us_topic_0000001160307782_section112501126379"><h4 class="sectiontitle">MongoDB Migration</h4>
<div class="section" id="drs_11_0008__en-us_topic_0000001160307782_section112501126379"><h4 class="sectiontitle">Migration from MongoDB to DDS</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0008__en-us_topic_0000001160307782_table9416253193637" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Checking whether the destination database user has sufficient permissions</caption><tbody><tr id="drs_11_0008__en-us_topic_0000001160307782_row9423187193637"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.1.1"><p id="drs_11_0008__en-us_topic_0000001160307782_p5171784919384"><strong id="drs_11_0008__en-us_topic_0000001160307782_b10248131617913">Check Item</strong></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.1.1 "><p id="drs_11_0008__en-us_topic_0000001160307782_p5046226419374">Whether the destination database user has sufficient permissions</p>
@ -126,12 +126,12 @@
</div>
</div>
<div class="section" id="drs_11_0008__en-us_topic_0000001160307782_section10918203894615"><h4 class="sectiontitle">Oracle -&gt; PostgreSQL Synchronization</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0008__en-us_topic_0000001160307782_table791873814463" frame="border" border="1" rules="all"><caption><b>Table 4 </b>Checking whether the destination database user has sufficient permissions</caption><tbody><tr id="drs_11_0008__en-us_topic_0000001160307782_row139191238124619"><th class="firstcol" valign="top" width="11%" id="mcps1.3.4.2.2.3.1.1"><p id="drs_11_0008__en-us_topic_0000001160307782_p13919638154619"><strong id="drs_11_0008__b1697333972">Check Item</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0008__en-us_topic_0000001160307782_table791873814463" frame="border" border="1" rules="all"><caption><b>Table 4 </b>Checking whether the destination database user has sufficient permissions</caption><tbody><tr id="drs_11_0008__en-us_topic_0000001160307782_row139191238124619"><th class="firstcol" valign="top" width="11%" id="mcps1.3.4.2.2.3.1.1"><p id="drs_11_0008__en-us_topic_0000001160307782_p13919638154619"><strong id="drs_11_0008__b1127327824">Check Item</strong></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.4.2.2.3.1.1 "><p id="drs_11_0008__en-us_topic_0000001160307782_p12919838134617">Whether the destination database user has sufficient permissions</p>
</td>
</tr>
<tr id="drs_11_0008__en-us_topic_0000001160307782_row791913388467"><th class="firstcol" valign="top" width="11%" id="mcps1.3.4.2.2.3.2.1"><p id="drs_11_0008__en-us_topic_0000001160307782_p1791993874619"><strong id="drs_11_0008__b884174430">Description</strong></p>
<tr id="drs_11_0008__en-us_topic_0000001160307782_row791913388467"><th class="firstcol" valign="top" width="11%" id="mcps1.3.4.2.2.3.2.1"><p id="drs_11_0008__en-us_topic_0000001160307782_p1791993874619"><strong id="drs_11_0008__b958331081">Description</strong></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.4.2.2.3.2.1 "><p id="drs_11_0008__en-us_topic_0000001160307782_p1391973844619">Check whether the destination database user permissions meet the migration requirements. If the permissions are insufficient, the migration will fail.</p>
</td>

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</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">Migration from MongoDB to DDS</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 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>
<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>

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</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">Migration from MongoDB to DDS</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 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>
<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>

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<h1 class="topictitle1">Checking Whether the Destination Database Contains a Non-Empty Collection with the Same Name As the Source Database</h1>
<div id="body8662426"><div class="section" id="drs_11_0043__en-us_topic_0000001205747893_section44628183348"><h4 class="sectiontitle">MongoDB Migration</h4>
<div id="body8662426"><div class="section" id="drs_11_0043__en-us_topic_0000001205747893_section44628183348"><h4 class="sectiontitle">Migration from MongoDB to DDS</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0043__en-us_topic_0000001205747893_table18108192214474" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the destination database contains a non-empty collection with the same name as the source database</caption><tbody><tr id="drs_11_0043__en-us_topic_0000001205747893_row19108192294711"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_11_0043__en-us_topic_0000001205747893_p191087222477">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.1.1 "><p id="drs_11_0043__en-us_topic_0000001205747893_p01081022104711">Whether the destination database contains a <span class="keyword" id="drs_11_0043__en-us_topic_0000001205747893_keyword14708113151817">non-empty collection with the same name as the source database</span></p>

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<h1 class="topictitle1">Checking Whether the Source and Destination Databases Are of the Same Type</h1>
<div id="body8662426"><div class="section" id="drs_11_0046__en-us_topic_0000001205627807_section1589154364416"><h4 class="sectiontitle">MongoDB Migration</h4>
<div id="body8662426"><div class="section" id="drs_11_0046__en-us_topic_0000001205627807_section1589154364416"><h4 class="sectiontitle">Migration from MongoDB to DDS</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0046__en-us_topic_0000001205627807_table18108192214474" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the source and destination databases are of the same type</caption><tbody><tr id="drs_11_0046__en-us_topic_0000001205627807_row19108192294711"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_11_0046__en-us_topic_0000001205627807_p191087222477">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.1.1 "><p id="drs_11_0046__en-us_topic_0000001205627807_p01081022104711">Whether the source and destination databases are of the same type</p>

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<h1 class="topictitle1">Checking Whether the MongoDB Instance Type Matches the Migration Mode</h1>
<div id="body8662426"><div class="section" id="drs_11_0066__en-us_topic_0000001205429315_section1215815382368"><h4 class="sectiontitle">MongoDB Migration</h4>
<div id="body8662426"><div class="section" id="drs_11_0066__en-us_topic_0000001205429315_section1215815382368"><h4 class="sectiontitle">Migration from MongoDB to DDS</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0066__en-us_topic_0000001205429315_table1828717534330" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the MongoDB instance type matches the migration mode</caption><tbody><tr id="drs_11_0066__en-us_topic_0000001205429315_row928715319335"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_11_0066__en-us_topic_0000001205429315_p1028711530339">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.1.1 "><p id="drs_11_0066__en-us_topic_0000001205429315_p1728711536333">Whether the MongoDB instance type matches the migration mode</p>

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<h1 class="topictitle1">Checking Whether the Shard Key Can Be Obtained from the Source Database</h1>
<div id="body8662426"><div class="section" id="drs_11_0069__en-us_topic_0000001159989374_section195192465556"><h4 class="sectiontitle">MongoDB Migration</h4>
<div id="body8662426"><div class="section" id="drs_11_0069__en-us_topic_0000001159989374_section195192465556"><h4 class="sectiontitle">Migration from MongoDB to DDS</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0069__en-us_topic_0000001159989374_table9377978185833" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the shard keys can be obtained from the source database</caption><tbody><tr id="drs_11_0069__en-us_topic_0000001159989374_row2529615185833"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_11_0069__en-us_topic_0000001159989374_p5284851919057"><strong id="drs_11_0069__en-us_topic_0000001159989374_b14598205284715">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_0069__en-us_topic_0000001159989374_p27563616193151">Whether the shard keys can be obtained from the source database</p>

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<h1 class="topictitle1">Checking Whether the Source Database Collections Contain More Than 10 Indexes</h1>
<div id="body8662426"><div class="section" id="drs_11_0200__en-us_topic_0000001159989360_section1238917511343"><h4 class="sectiontitle">MongoDB Migration</h4>
<div id="body8662426"><div class="section" id="drs_11_0200__en-us_topic_0000001159989360_section1238917511343"><h4 class="sectiontitle">Migration from MongoDB to DDS</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0200__en-us_topic_0000001159989360_table18108192214474" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the source database collections contain more than 10 indexes</caption><tbody><tr id="drs_11_0200__en-us_topic_0000001159989360_row19108192294711"><th class="firstcol" valign="top" width="11.06%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_11_0200__en-us_topic_0000001159989360_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_11_0200__en-us_topic_0000001159989360_p01081022104711">Whether the source database collections contain more than 10 indexes</p>

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<h1 class="topictitle1">Checking Whether the ChangeStream API of the source DB instance is available</h1>
<div id="body0000001238530478"><div class="section" id="drs_11_0463__en-us_topic_0000001160307886_section1275729103916"><h4 class="sectiontitle">MongoDB-to-DDS Migration</h4>
<div id="body0000001238530478"><div class="section" id="drs_11_0463__en-us_topic_0000001160307886_section1275729103916"><h4 class="sectiontitle">Migration from MongoDB to DDS</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_11_0463__en-us_topic_0000001160307886_table9377978185833" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Checking whether the ChangeStream API of the source DB instance is available</caption><tbody><tr id="drs_11_0463__en-us_topic_0000001160307886_row2529615185833"><th class="firstcol" valign="top" width="11%" id="mcps1.3.1.2.2.3.1.1"><p id="drs_11_0463__en-us_topic_0000001160307886_p5284851919057">Check Item</p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.1.2.2.3.1.1 "><p id="drs_11_0463__en-us_topic_0000001160307886_p27563616193151">Whether the ChangeStream API of the source DB instance is available</p>

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<h1 class="topictitle1">What Can I Do When OOM Occurs During the Migration of MongoDB Databases?</h1>
<div id="body8662426"><div class="section" id="drs_15_0100__en-us_topic_0000001205509263_section59341942508"><h4 class="sectiontitle">Scenarios</h4><p id="drs_15_0100__en-us_topic_0000001205509263_p14301269508">Out of memory (OOM) occurs during the migration of MongoDB databases, causing migration failures.</p>
<h1 class="topictitle1">What Can I Do When OOM Occurs During the Migration from MongoDB to DDS?</h1>
<div id="body8662426"><div class="section" id="drs_15_0100__en-us_topic_0000001205509263_section59341942508"><h4 class="sectiontitle">Scenarios</h4><p id="drs_15_0100__en-us_topic_0000001205509263_p14301269508">Out of memory (OOM) occurs during the migration from MongoDB to DDS, causing migration failures.</p>
</div>
<div class="section" id="drs_15_0100__en-us_topic_0000001205509263_section1189038165213"><h4 class="sectiontitle">Possible Cause</h4><p id="drs_15_0100__en-us_topic_0000001205509263_p10966154015536">The possible causes are as follows:</p>
<ul id="drs_15_0100__en-us_topic_0000001205509263_ul6454134616529"><li id="drs_15_0100__en-us_topic_0000001205509263_li134541546165215">If the mongod service of the source database is deployed on a single server, OOM occurs when the migration process consumes large amounts of memory through operations such as creating indexes and sorting queries.</li><li id="drs_15_0100__en-us_topic_0000001205509263_li091494035917">If the mongod service is deployed on a server with other services and the <strong id="drs_15_0100__en-us_topic_0000001205509263_b125244228361">cacheSizeGB</strong> value is not specified, OOM occurs when all available memory has been allocated to other services, so the WiredTiger engine does not have sufficient memory.<div class="note" id="drs_15_0100__en-us_topic_0000001205509263_note1534218191804"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="drs_15_0100__en-us_topic_0000001205509263_p11343219604">By default, the memory used by the WiredTiger engine of mongod is calculated as follows: (Memory in GB-1) x 50% for version 3.2 or (Memory in GB-1) x 50% for version 3.4 and later.</p>
<ul id="drs_15_0100__en-us_topic_0000001205509263_ul6454134616529"><li id="drs_15_0100__en-us_topic_0000001205509263_li134541546165215">If the mongod service of the source database is deployed on a single server, OOM occurs when the migration process consumes large amounts of memory through operations such as creating indexes and sorting queries.</li><li id="drs_15_0100__en-us_topic_0000001205509263_li091494035917">If the mongod service is deployed on a server with other services and the <strong id="drs_15_0100__en-us_topic_0000001205509263_b125244228361">cacheSizeGB</strong> value is not specified, OOM occurs when all available memory has been allocated to other services, so the WiredTiger engine does not have sufficient memory.<div class="note" id="drs_15_0100__en-us_topic_0000001205509263_note1534218191804"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="drs_15_0100__en-us_topic_0000001205509263_p11343219604">By default, the memory used by the WiredTiger engine of mongod is calculated as follows: (Memory in GB-1) x 50% for version 3.2 or (Memory in GB-1) x 60% for version 3.4 and later.</p>
</div></div>
</li></ul>
</div>

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<div id="body8662426"><p id="drs_16_0001__en-us_topic_0000001205627815_p8060118">Before using the DRS service to migrate collections between sharded clusters, you must disable the balancer of the collections to be migrated.</p>
<div class="note" id="drs_16_0001__en-us_topic_0000001205627815_note17545103863712"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="drs_16_0001__en-us_topic_0000001205627815_ul133214389556"><li id="drs_16_0001__en-us_topic_0000001205627815_li169732497557">After the migration is complete, enable the balancer. The balancer is disabled during the migration, generating different numbers of chunks on each shard of the source database. After the balancer is enabled, chunks will be distributed between shards in the cluster, which may affect the performance of the source database.</li></ul>
</div></div>
<div class="section" id="drs_16_0001__en-us_topic_0000001205627815_section175407531019"><h4 class="sectiontitle">Procedure</h4><ol id="drs_16_0001__en-us_topic_0000001205627815_ol16233294107"><li id="drs_16_0001__en-us_topic_0000001205627815_li1323112991016"><span>Log in to a database through mongo shell.</span></li><li id="drs_16_0001__en-us_topic_0000001205627815_li17619143114143"><span>Run the following command in the command window of the mongos node to switch to the config database:</span><p><p id="drs_16_0001__en-us_topic_0000001205627815_p946315919148"><strong id="drs_16_0001__en-us_topic_0000001205627815_b2060310411512">use config</strong></p>
<div class="section" id="drs_16_0001__en-us_topic_0000001205627815_section175407531019"><h4 class="sectiontitle">Procedure</h4><ol id="drs_16_0001__en-us_topic_0000001205627815_ol16233294107"><li id="drs_16_0001__en-us_topic_0000001205627815_li1323112991016"><span>Log in to a database through shell tools.</span></li><li id="drs_16_0001__en-us_topic_0000001205627815_li17619143114143"><span>Run the following command in the command window of the mongos node to switch to the config database:</span><p><p id="drs_16_0001__en-us_topic_0000001205627815_p946315919148"><strong id="drs_16_0001__en-us_topic_0000001205627815_b2060310411512">use config</strong></p>
</p></li><li id="drs_16_0001__en-us_topic_0000001205627815_li09815422107"><span>Run the following commands to check whether the balancer can be disabled:</span><p><pre class="screen" id="drs_16_0001__en-us_topic_0000001205627815_screen13393219171912">while( sh.isBalancerRunning() ) {
print("waiting...");
sleep(1000);

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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="drs_16_1148.html">Why Does the Delay of DR Tasks Increase?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="drs_16_1157.html">Why Is the Delay High In MongoDB Replication Scenarios?</a></strong><br>
<li class="ulchildlink"><strong><a href="drs_16_1157.html">Why Is the Delay High In Migration from MongoDB to DDS?</a></strong><br>
</li>
</ul>

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<h1 class="topictitle1">Why Is the Delay High In MongoDB Replication Scenarios?</h1>
<h1 class="topictitle1">Why Is the Delay High In Migration from MongoDB to DDS?</h1>
<div id="body0000001292993281"><div class="section" id="drs_16_1157__section399911515410"><h4 class="sectiontitle">Involved Scenarios</h4><ul id="drs_16_1157__ul18860200518"><li id="drs_16_1157__li88601706510">Migration from MongoDB to DDS</li><li id="drs_16_1157__li142849816517">Migration from DDS to MongoDB</li></ul>
</div>
<div class="section" id="drs_16_1157__section5154152814611"><h4 class="sectiontitle">Possible Causes</h4><p id="drs_16_1157__p14779513542">To ensure the performance of migration, synchronization, or disaster recovery, DRS performs concurrent replay at the collection level in the incremental phase. In the following special cases, DRS supports only single-thread write and does not support concurrent replay:</p>

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<div id="body1572505612550"><div class="section" id="drs_backup_tag__section546965513717"><h4 class="sectiontitle">Scenarios</h4><div class="p" id="drs_backup_tag__drs_online_tag_p62739759153332"><span class="keyword" id="drs_backup_tag__drs_online_tag_keyword1691153111546">Tag Management Service (TMS)</span> enables you to use tags on the management console to manage resources. TMS works with other cloud services to manage tags. TMS manages tags globally, and other cloud services manage their own tags. If you have to manage a large number of tasks, you can use different tags to identify and search for tasks.<ul id="drs_backup_tag__drs_online_tag_ul10009188184716"><li id="drs_backup_tag__drs_online_tag_li34815110153828">You are advised to set predefined tags on the TMS console.</li><li id="drs_backup_tag__drs_online_tag_li33745154153336">A tag consists of a key and value. You can add only one value for each key.</li><li id="drs_backup_tag__drs_online_tag_li1839715244587">Each DB instance can have up to 20 tags.</li></ul>
</div>
</div>
<div class="section" id="drs_backup_tag__section1895751541018"><h4 class="sectiontitle">Adding a Tag</h4><ol id="drs_backup_tag__ol798994918127"><li id="drs_backup_tag__li1095419541577"><span>On the <span class="uicontrol" id="drs_backup_tag__uicontrol104841213132219"><b>Backup Migration Management</b></span> page, click the target migration task name in the <strong id="drs_backup_tag__b1848512135228">Task Name/ID</strong> column.</span></li><li id="drs_backup_tag__li18954145416571"><span>On the <strong id="drs_backup_tag__drs_online_tag_b818113545912">Basic Information</strong> tab, click the <strong id="drs_backup_tag__drs_online_tag_b1439927195810">Tags</strong> tab.</span></li><li id="drs_backup_tag__li3353879811230"><span>On the <span class="uicontrol" id="drs_backup_tag__drs_online_tag_uicontrol1874550010184218"><b>Tags</b></span> tab, click <span class="uicontrol" id="drs_backup_tag__drs_online_tag_uicontrol111371658118448"><b>Add Tag</b></span>. In the displayed dialog box, enter a tag key and value, and click <span class="uicontrol" id="drs_backup_tag__drs_online_tag_uicontrol1307702785184613"><b>OK</b></span>.</span><p><p id="drs_backup_tag__drs_online_tag_p77551607116"></p>
<ul id="drs_backup_tag__drs_online_tag_ul28256248105525"><li id="drs_backup_tag__drs_online_tag_li8676590301">The tag key must be unique and must consist of 1 to 36 characters. Only letters, digits, hyphens (-), sign (@), and underscores (_) are allowed.</li><li id="drs_backup_tag__drs_online_tag_li94049377595">The tag value can be empty or consist of 1 to 43 characters. Only letters, digits, hyphens (-), sign (@), and underscores (_) are allowed.</li><li id="drs_backup_tag__drs_online_tag_li1656813445712">The key of a tag cannot be <strong id="drs_backup_tag__drs_online_tag_b6400154211711">_sys_enterprise_project_id</strong>. <strong id="drs_backup_tag__drs_online_tag_b15153184791720">_sys_enterprise_project_id</strong> is a fixed tag of the enterprise project system and cannot be manually added.</li></ul>
<div class="section" id="drs_backup_tag__section1895751541018"><h4 class="sectiontitle">Adding a Tag</h4><ol id="drs_backup_tag__ol798994918127"><li id="drs_backup_tag__li1095419541577"><span>On the <span class="uicontrol" id="drs_backup_tag__uicontrol104841213132219"><b>Backup Migration Management</b></span> page, click the target migration task name in the <strong id="drs_backup_tag__b1848512135228">Task Name/ID</strong> column.</span></li><li id="drs_backup_tag__li18954145416571"><span>On the <strong id="drs_backup_tag__drs_online_tag_b818113545912">Basic Information</strong> tab, click the <strong id="drs_backup_tag__drs_online_tag_b1439927195810">Tags</strong> tab.</span></li><li id="drs_backup_tag__li3353879811230"><span>On the <span class="uicontrol" id="drs_backup_tag__drs_online_tag_uicontrol1874550010184218"><b>Tags</b></span> tab, click <span class="uicontrol" id="drs_backup_tag__drs_online_tag_uicontrol111371658118448"><b>Add/Edit Tag</b></span>. In the displayed dialog box, enter a tag key and value, click <strong id="drs_backup_tag__drs_online_tag_b225457192210">Add</strong>, and click <span class="uicontrol" id="drs_backup_tag__drs_online_tag_uicontrol1307702785184613"><b>OK</b></span>.</span><p><p id="drs_backup_tag__drs_online_tag_p77551607116"></p>
<ul id="drs_backup_tag__drs_online_tag_ul28256248105525"><li id="drs_backup_tag__drs_online_tag_li8676590301">The tag key cannot be empty and must be unique. It cannot start or end with a space or start with _sys_. It can contain 1 to 128 characters, including letters, numbers, spaces, and the following characters: _ . : = + - @.</li><li id="drs_backup_tag__drs_online_tag_li94049377595">The tag value can be empty. It cannot start or end with a space and can contain 0 to 255 characters, including letters, numbers, spaces, and the following characters: _ . : / = + - @.</li><li id="drs_backup_tag__drs_online_tag_li1656813445712">The key of a tag cannot be <strong id="drs_backup_tag__drs_online_tag_b6400154211711">_sys_enterprise_project_id</strong>. <strong id="drs_backup_tag__drs_online_tag_b15153184791720">_sys_enterprise_project_id</strong> is a fixed tag of the enterprise project system and cannot be manually added.</li></ul>
</p></li><li id="drs_backup_tag__li60539872152925"><span>After a tag has been added, you can view and manage it on the <strong id="drs_backup_tag__drs_online_tag_b028219550134">Tags</strong> page.</span></li></ol>
</div>
<div class="section" id="drs_backup_tag__section16959151514100"><h4 class="sectiontitle">Editing a Tag</h4><ol id="drs_backup_tag__ol275949818322"><li id="drs_backup_tag__li19808414152"><span>On the <span class="uicontrol" id="drs_backup_tag__drs_backup_tag_uicontrol104841213132219"><b>Backup Migration Management</b></span> page, click the target migration task name in the <strong id="drs_backup_tag__drs_backup_tag_b1848512135228">Task Name/ID</strong> column.</span></li><li id="drs_backup_tag__li680813114156"><span>On the <strong id="drs_backup_tag__drs_online_tag_b818113545912_1">Basic Information</strong> tab, click the <strong id="drs_backup_tag__drs_online_tag_b1439927195810_1">Tags</strong> tab.</span></li><li id="drs_backup_tag__li64121748162643"><span>On the <strong id="drs_backup_tag__drs_online_tag_b17884154114813">Tags</strong> page, click <strong id="drs_backup_tag__drs_online_tag_b6886104174815">Add/Edit Tags</strong>. In the displayed dialog box, modify the tag and click <strong id="drs_backup_tag__drs_online_tag_b1588804174814">OK</strong>.</span></li></ol>

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</th>
</tr>
</thead>
<tbody><tr id="drs_change_history__row061519915292"><td class="cellrowborder" valign="top" width="18.459999999999997%" headers="mcps1.3.1.1.3.1.1 "><p id="drs_change_history__p9687121073015">2023-11-17</p>
<tbody><tr id="drs_change_history__row13659174018527"><td class="cellrowborder" valign="top" width="18.459999999999997%" headers="mcps1.3.1.1.3.1.1 "><p id="drs_change_history__p9769936165116">2024-04-15</p>
</td>
<td class="cellrowborder" valign="top" width="81.54%" headers="mcps1.3.1.1.3.1.2 "><p id="drs_change_history__p13767104814529">This issue is the fifteenth official release, which incorporates the following changes:</p>
<ul id="drs_change_history__ul208001330125418"><li id="drs_change_history__li19801173085417">Supported <a href="drs_10_0402.html">Importing Synchronization Objects</a> and <a href="drs_03_0035.html">Processing Data</a> for real-time synchronization from MySQL to MySQL.</li></ul>
</td>
</tr>
<tr id="drs_change_history__row89611139112816"><td class="cellrowborder" valign="top" width="18.459999999999997%" headers="mcps1.3.1.1.3.1.1 "><p id="drs_change_history__p139612039142820">2024-03-07</p>
</td>
<td class="cellrowborder" valign="top" width="81.54%" headers="mcps1.3.1.1.3.1.2 "><p id="drs_change_history__p671549182818">This issue is the fourteenth official release, which incorporates the following changes:</p>
<ul id="drs_change_history__ul186251225183011"><li id="drs_change_history__li5348103131713">Supported real-time synchronization of PostgreSQL 14.</li><li id="drs_change_history__li1974701563118">Modified Tag Management contents.</li></ul>
</td>
</tr>
<tr id="drs_change_history__row132734432018"><td class="cellrowborder" valign="top" width="18.459999999999997%" headers="mcps1.3.1.1.3.1.1 "><p id="drs_change_history__p11301121811116">2024-01-10</p>
</td>
<td class="cellrowborder" valign="top" width="81.54%" headers="mcps1.3.1.1.3.1.2 "><p id="drs_change_history__p88572408314">This issue is the thirteenth official release, which incorporates the following changes:</p>
<ul id="drs_change_history__ul135061938416"><li id="drs_change_history__li850653814119">Added <a href="drs_01_0201.html">Permissions Management</a> and <a href="drs_02_0470.html">Preparations</a>.</li><li id="drs_change_history__li598811261738">Supported real-time synchronization of Oracle 21c.</li></ul>
</td>
</tr>
<tr id="drs_change_history__row061519915292"><td class="cellrowborder" valign="top" width="18.459999999999997%" headers="mcps1.3.1.1.3.1.1 "><p id="drs_change_history__p9687121073015">2023-11-17</p>
</td>
<td class="cellrowborder" valign="top" width="81.54%" headers="mcps1.3.1.1.3.1.2 "><p id="drs_change_history__p12688101011308">This issue is the twelfth official release, which incorporates the following changes:</p>
<ul id="drs_change_history__ul295815574418"><li id="drs_change_history__li1695865712411">Supported real-time migration of DDS 4.4.</li></ul>

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<div id="body1572505612550"><div class="section" id="drs_disaster_tag__section546965513717"><h4 class="sectiontitle">Scenarios</h4><div class="p" id="drs_disaster_tag__drs_online_tag_p62739759153332"><span class="keyword" id="drs_disaster_tag__drs_online_tag_keyword1691153111546">Tag Management Service (TMS)</span> enables you to use tags on the management console to manage resources. TMS works with other cloud services to manage tags. TMS manages tags globally, and other cloud services manage their own tags. If you have to manage a large number of tasks, you can use different tags to identify and search for tasks.<ul id="drs_disaster_tag__drs_online_tag_ul10009188184716"><li id="drs_disaster_tag__drs_online_tag_li34815110153828">You are advised to set predefined tags on the TMS console.</li><li id="drs_disaster_tag__drs_online_tag_li33745154153336">A tag consists of a key and value. You can add only one value for each key.</li><li id="drs_disaster_tag__drs_online_tag_li1839715244587">Each DB instance can have up to 20 tags.</li></ul>
</div>
</div>
<div class="section" id="drs_disaster_tag__section1895751541018"><h4 class="sectiontitle">Adding a Tag</h4><ol id="drs_disaster_tag__ol798994918127"><li id="drs_disaster_tag__li1095419541577"><span>On the <span class="uicontrol" id="drs_disaster_tag__drs_03_0024_uicontrol5983031162419"><b>Disaster Recovery Management</b></span> page, click the target DR task in the <strong id="drs_disaster_tag__drs_03_0024_b11983173117244">Task Name/ID</strong> column.</span></li><li id="drs_disaster_tag__li18954145416571"><span>On the <strong id="drs_disaster_tag__drs_online_tag_b818113545912">Basic Information</strong> tab, click the <strong id="drs_disaster_tag__drs_online_tag_b1439927195810">Tags</strong> tab.</span></li><li id="drs_disaster_tag__li3353879811230"><span>On the <span class="uicontrol" id="drs_disaster_tag__drs_online_tag_uicontrol1874550010184218"><b>Tags</b></span> tab, click <span class="uicontrol" id="drs_disaster_tag__drs_online_tag_uicontrol111371658118448"><b>Add Tag</b></span>. In the displayed dialog box, enter a tag key and value, and click <span class="uicontrol" id="drs_disaster_tag__drs_online_tag_uicontrol1307702785184613"><b>OK</b></span>.</span><p><p id="drs_disaster_tag__drs_online_tag_p77551607116"></p>
<ul id="drs_disaster_tag__drs_online_tag_ul28256248105525"><li id="drs_disaster_tag__drs_online_tag_li8676590301">The tag key must be unique and must consist of 1 to 36 characters. Only letters, digits, hyphens (-), sign (@), and underscores (_) are allowed.</li><li id="drs_disaster_tag__drs_online_tag_li94049377595">The tag value can be empty or consist of 1 to 43 characters. Only letters, digits, hyphens (-), sign (@), and underscores (_) are allowed.</li><li id="drs_disaster_tag__drs_online_tag_li1656813445712">The key of a tag cannot be <strong id="drs_disaster_tag__drs_online_tag_b6400154211711">_sys_enterprise_project_id</strong>. <strong id="drs_disaster_tag__drs_online_tag_b15153184791720">_sys_enterprise_project_id</strong> is a fixed tag of the enterprise project system and cannot be manually added.</li></ul>
<div class="section" id="drs_disaster_tag__section1895751541018"><h4 class="sectiontitle">Adding a Tag</h4><ol id="drs_disaster_tag__ol798994918127"><li id="drs_disaster_tag__li1095419541577"><span>On the <span class="uicontrol" id="drs_disaster_tag__drs_03_0024_uicontrol5983031162419"><b>Disaster Recovery Management</b></span> page, click the target DR task in the <strong id="drs_disaster_tag__drs_03_0024_b11983173117244">Task Name/ID</strong> column.</span></li><li id="drs_disaster_tag__li18954145416571"><span>On the <strong id="drs_disaster_tag__drs_online_tag_b818113545912">Basic Information</strong> tab, click the <strong id="drs_disaster_tag__drs_online_tag_b1439927195810">Tags</strong> tab.</span></li><li id="drs_disaster_tag__li3353879811230"><span>On the <span class="uicontrol" id="drs_disaster_tag__drs_online_tag_uicontrol1874550010184218"><b>Tags</b></span> tab, click <span class="uicontrol" id="drs_disaster_tag__drs_online_tag_uicontrol111371658118448"><b>Add/Edit Tag</b></span>. In the displayed dialog box, enter a tag key and value, click <strong id="drs_disaster_tag__drs_online_tag_b225457192210">Add</strong>, and click <span class="uicontrol" id="drs_disaster_tag__drs_online_tag_uicontrol1307702785184613"><b>OK</b></span>.</span><p><p id="drs_disaster_tag__drs_online_tag_p77551607116"></p>
<ul id="drs_disaster_tag__drs_online_tag_ul28256248105525"><li id="drs_disaster_tag__drs_online_tag_li8676590301">The tag key cannot be empty and must be unique. It cannot start or end with a space or start with _sys_. It can contain 1 to 128 characters, including letters, numbers, spaces, and the following characters: _ . : = + - @.</li><li id="drs_disaster_tag__drs_online_tag_li94049377595">The tag value can be empty. It cannot start or end with a space and can contain 0 to 255 characters, including letters, numbers, spaces, and the following characters: _ . : / = + - @.</li><li id="drs_disaster_tag__drs_online_tag_li1656813445712">The key of a tag cannot be <strong id="drs_disaster_tag__drs_online_tag_b6400154211711">_sys_enterprise_project_id</strong>. <strong id="drs_disaster_tag__drs_online_tag_b15153184791720">_sys_enterprise_project_id</strong> is a fixed tag of the enterprise project system and cannot be manually added.</li></ul>
</p></li><li id="drs_disaster_tag__li60539872152925"><span>After a tag has been added, you can view and manage it on the <strong id="drs_disaster_tag__drs_online_tag_b028219550134">Tags</strong> page.</span></li></ol>
</div>
<div class="section" id="drs_disaster_tag__section16959151514100"><h4 class="sectiontitle">Editing a Tag</h4><ol id="drs_disaster_tag__ol275949818322"><li id="drs_disaster_tag__li19808414152"><span>On the <span class="uicontrol" id="drs_disaster_tag__drs_disaster_tag_drs_03_0024_uicontrol5983031162419"><b>Disaster Recovery Management</b></span> page, click the target DR task in the <strong id="drs_disaster_tag__drs_disaster_tag_drs_03_0024_b11983173117244">Task Name/ID</strong> column.</span></li><li id="drs_disaster_tag__li680813114156"><span>On the <strong id="drs_disaster_tag__drs_online_tag_b818113545912_1">Basic Information</strong> tab, click the <strong id="drs_disaster_tag__drs_online_tag_b1439927195810_1">Tags</strong> tab.</span></li><li id="drs_disaster_tag__li64121748162643"><span>On the <strong id="drs_disaster_tag__drs_online_tag_b17884154114813">Tags</strong> page, click <strong id="drs_disaster_tag__drs_online_tag_b6886104174815">Add/Edit Tags</strong>. In the displayed dialog box, modify the tag and click <strong id="drs_disaster_tag__drs_online_tag_b1588804174814">OK</strong>.</span></li></ol>

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</thead>
<tbody><tr id="drs_offline_migration__row5940161318"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.4.3.2.4.1.1 "><p id="drs_offline_migration__p094061016">Full backup file of RDS Microsoft SQL Server</p>
</td>
<td class="cellrowborder" rowspan="2" valign="top" width="30%" headers="mcps1.3.4.3.2.4.1.2 "><p id="drs_offline_migration__p09408119114">RDS for Microsoft SQL Server</p>
<td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.4.3.2.4.1.2 "><p id="drs_offline_migration__p09408119114">RDS for Microsoft SQL Server</p>
<p id="drs_offline_migration__p1194013112115"></p>
</td>
<td class="cellrowborder" valign="top" width="40%" headers="mcps1.3.4.3.2.4.1.3 "><p id="drs_offline_migration__p19401113114"><a href="drs_02_0010.html">Creating an RDS Backup Migration Task</a></p>
</td>
</tr>
<tr id="drs_offline_migration__row4940191218"><td class="cellrowborder" valign="top" headers="mcps1.3.4.3.2.4.1.1 "><p id="drs_offline_migration__p9940814116">Backup files o f on-premises and other cloud Microsoft SQL Server</p>
<tr id="drs_offline_migration__row4940191218"><td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.4.3.2.4.1.1 "><p id="drs_offline_migration__p9940814116">Backup files of on-premises and other cloud Microsoft SQL Server</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.4.3.2.4.1.2 "><p id="drs_offline_migration__p199401811218"><a href="drs_02_0009.html">Creating a Backup Using OBS Buckets</a></p>
<td class="cellrowborder" valign="top" width="30%" headers="mcps1.3.4.3.2.4.1.2 "><p id="drs_offline_migration__p189999426511">RDS for Microsoft SQL Server</p>
</td>
<td class="cellrowborder" valign="top" width="40%" headers="mcps1.3.4.3.2.4.1.3 "><p id="drs_offline_migration__p199401811218"><a href="drs_02_0009.html">Creating a Backup Using OBS Buckets</a></p>
</td>
</tr>
</tbody>

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<div id="body1572505612550"><div class="section" id="drs_online_tag__section546965513717"><h4 class="sectiontitle">Scenarios</h4><div class="p" id="drs_online_tag__p62739759153332"><span class="keyword" id="drs_online_tag__keyword1691153111546">Tag Management Service (TMS)</span> enables you to use tags on the management console to manage resources. TMS works with other cloud services to manage tags. TMS manages tags globally, and other cloud services manage their own tags. If you have to manage a large number of tasks, you can use different tags to identify and search for tasks.<ul id="drs_online_tag__ul10009188184716"><li id="drs_online_tag__li34815110153828">You are advised to set predefined tags on the TMS console.</li><li id="drs_online_tag__li33745154153336">A tag consists of a key and value. You can add only one value for each key.</li><li id="drs_online_tag__li1839715244587">Each DB instance can have up to 20 tags.</li></ul>
</div>
</div>
<div class="section" id="drs_online_tag__section1895751541018"><h4 class="sectiontitle">Adding a Tag</h4><ol id="drs_online_tag__ol798994918127"><li id="drs_online_tag__li1095419541577"><span>On the <span class="uicontrol" id="drs_online_tag__uicontrol19352122093616"><b>Online Migration Management</b></span> page, click the target migration task name in the <strong id="drs_online_tag__b13548209369">Task Name/ID</strong> column.</span></li><li id="drs_online_tag__li18954145416571"><span>On the <strong id="drs_online_tag__b818113545912">Basic Information</strong> tab, click the <strong id="drs_online_tag__b1439927195810">Tags</strong> tab.</span></li><li id="drs_online_tag__li3353879811230"><span>On the <span class="uicontrol" id="drs_online_tag__uicontrol1874550010184218"><b>Tags</b></span> tab, click <span class="uicontrol" id="drs_online_tag__uicontrol111371658118448"><b>Add Tag</b></span>. In the displayed dialog box, enter a tag key and value, and click <span class="uicontrol" id="drs_online_tag__uicontrol1307702785184613"><b>OK</b></span>.</span><p><p id="drs_online_tag__p77551607116"></p>
<ul id="drs_online_tag__ul28256248105525"><li id="drs_online_tag__li8676590301">The tag key must be unique and must consist of 1 to 36 characters. Only letters, digits, hyphens (-), sign (@), and underscores (_) are allowed.</li><li id="drs_online_tag__li94049377595">The tag value can be empty or consist of 1 to 43 characters. Only letters, digits, hyphens (-), sign (@), and underscores (_) are allowed.</li><li id="drs_online_tag__li1656813445712">The key of a tag cannot be <strong id="drs_online_tag__b6400154211711">_sys_enterprise_project_id</strong>. <strong id="drs_online_tag__b15153184791720">_sys_enterprise_project_id</strong> is a fixed tag of the enterprise project system and cannot be manually added.</li></ul>
<div class="section" id="drs_online_tag__section1895751541018"><h4 class="sectiontitle">Adding a Tag</h4><ol id="drs_online_tag__ol798994918127"><li id="drs_online_tag__li1095419541577"><span>On the <span class="uicontrol" id="drs_online_tag__uicontrol19352122093616"><b>Online Migration Management</b></span> page, click the target migration task name in the <strong id="drs_online_tag__b13548209369">Task Name/ID</strong> column.</span></li><li id="drs_online_tag__li18954145416571"><span>On the <strong id="drs_online_tag__b818113545912">Basic Information</strong> tab, click the <strong id="drs_online_tag__b1439927195810">Tags</strong> tab.</span></li><li id="drs_online_tag__li3353879811230"><span>On the <span class="uicontrol" id="drs_online_tag__uicontrol1874550010184218"><b>Tags</b></span> tab, click <span class="uicontrol" id="drs_online_tag__uicontrol111371658118448"><b>Add/Edit Tag</b></span>. In the displayed dialog box, enter a tag key and value, click <strong id="drs_online_tag__b225457192210">Add</strong>, and click <span class="uicontrol" id="drs_online_tag__uicontrol1307702785184613"><b>OK</b></span>.</span><p><p id="drs_online_tag__p77551607116"></p>
<ul id="drs_online_tag__ul28256248105525"><li id="drs_online_tag__li8676590301">The tag key cannot be empty and must be unique. It cannot start or end with a space or start with _sys_. It can contain 1 to 128 characters, including letters, numbers, spaces, and the following characters: _ . : = + - @.</li><li id="drs_online_tag__li94049377595">The tag value can be empty. It cannot start or end with a space and can contain 0 to 255 characters, including letters, numbers, spaces, and the following characters: _ . : / = + - @.</li><li id="drs_online_tag__li1656813445712">The key of a tag cannot be <strong id="drs_online_tag__b6400154211711">_sys_enterprise_project_id</strong>. <strong id="drs_online_tag__b15153184791720">_sys_enterprise_project_id</strong> is a fixed tag of the enterprise project system and cannot be manually added.</li></ul>
</p></li><li id="drs_online_tag__li60539872152925"><span>After a tag has been added, you can view and manage it on the <strong id="drs_online_tag__b028219550134">Tags</strong> page.</span></li></ol>
</div>
<div class="section" id="drs_online_tag__section16959151514100"><h4 class="sectiontitle">Editing a Tag</h4><ol id="drs_online_tag__ol275949818322"><li id="drs_online_tag__li19808414152"><span>On the <span class="uicontrol" id="drs_online_tag__drs_online_tag_uicontrol19352122093616"><b>Online Migration Management</b></span> page, click the target migration task name in the <strong id="drs_online_tag__drs_online_tag_b13548209369">Task Name/ID</strong> column.</span></li><li id="drs_online_tag__li680813114156"><span>On the <strong id="drs_online_tag__drs_disaster_tag_drs_online_tag_b818113545912">Basic Information</strong> tab, click the <strong id="drs_online_tag__drs_disaster_tag_drs_online_tag_b1439927195810">Tags</strong> tab.</span></li><li id="drs_online_tag__li172711810192616"><span>On the <strong id="drs_online_tag__b17884154114813">Tags</strong> page, click <strong id="drs_online_tag__b6886104174815">Add/Edit Tags</strong>. In the displayed dialog box, modify the tag and click <strong id="drs_online_tag__b1588804174814">OK</strong>.</span></li></ol>

4
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@ -76,7 +76,7 @@
<tr id="drs_precheck__en-us_topic_0000001205627821_row94326220200"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_precheck__en-us_topic_0000001205627821_p199161326162019">Failure cause: Failed to connect to the database.</p>
<p id="drs_precheck__en-us_topic_0000001205627821_p1495919297166">Handling suggestion:</p>
<p id="drs_precheck__en-us_topic_0000001205627821_p143317312221">The <strong id="drs_precheck__en-us_topic_0000001205627821_b187285246485">listen_addresses</strong> parameter value or port number in the <strong id="drs_precheck__en-us_topic_0000001205627821_b1242422674912">postgres.conf</strong> file is incorrect.</p>
<p id="drs_precheck__en-us_topic_0000001205627821_p95416241205">In the <strong id="drs_precheck__b2059689756">postgres.conf</strong> file, set the <strong id="drs_precheck__en-us_topic_0000001205627821_b1089573813493">listen_addresses</strong> value to <strong id="drs_precheck__en-us_topic_0000001205627821_b16897153834915">'*'</strong> or set the port number to the correct value. Then, restart the database for the modification to take effect.</p>
<p id="drs_precheck__en-us_topic_0000001205627821_p95416241205">In the <strong id="drs_precheck__b240359198">postgres.conf</strong> file, set the <strong id="drs_precheck__en-us_topic_0000001205627821_b1089573813493">listen_addresses</strong> value to <strong id="drs_precheck__en-us_topic_0000001205627821_b16897153834915">'*'</strong> 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_precheck__en-us_topic_0000001205627821_row1678213713205"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.3.3.1 "><p id="drs_precheck__en-us_topic_0000001205627821_p16892204002011">Failure cause: Incorrect username or password</p>
@ -97,7 +97,7 @@
</table>
</div>
</div>
<div class="section" id="drs_precheck__en-us_topic_0000001205627821_section7120182416126"><h4 class="sectiontitle">MongoDB Migration</h4>
<div class="section" id="drs_precheck__en-us_topic_0000001205627821_section7120182416126"><h4 class="sectiontitle">Migration from MongoDB to DDS</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="drs_precheck__en-us_topic_0000001205627821_table1401319101210" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Checking whether the source database is connected</caption><tbody><tr id="drs_precheck__en-us_topic_0000001205627821_row24081921213"><th class="firstcol" valign="top" width="11%" id="mcps1.3.3.2.2.3.1.1"><p id="drs_precheck__en-us_topic_0000001205627821_p144041913128"><strong id="drs_precheck__en-us_topic_0000001205627821_b19732105115118">Check Item</strong></p>
</th>
<td class="cellrowborder" valign="top" width="89%" headers="mcps1.3.3.2.2.3.1.1 "><p id="drs_precheck__en-us_topic_0000001205627821_p1557191916127">Whether the source database is connected</p>

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<div id="body1572505612550"><div class="section" id="drs_synchronization_tag__section546965513717"><h4 class="sectiontitle">Scenarios</h4><div class="p" id="drs_synchronization_tag__drs_online_tag_p62739759153332"><span class="keyword" id="drs_synchronization_tag__drs_online_tag_keyword1691153111546">Tag Management Service (TMS)</span> enables you to use tags on the management console to manage resources. TMS works with other cloud services to manage tags. TMS manages tags globally, and other cloud services manage their own tags. If you have to manage a large number of tasks, you can use different tags to identify and search for tasks.<ul id="drs_synchronization_tag__drs_online_tag_ul10009188184716"><li id="drs_synchronization_tag__drs_online_tag_li34815110153828">You are advised to set predefined tags on the TMS console.</li><li id="drs_synchronization_tag__drs_online_tag_li33745154153336">A tag consists of a key and value. You can add only one value for each key.</li><li id="drs_synchronization_tag__drs_online_tag_li1839715244587">Each DB instance can have up to 20 tags.</li></ul>
</div>
</div>
<div class="section" id="drs_synchronization_tag__section1895751541018"><h4 class="sectiontitle">Adding a Tag</h4><ol id="drs_synchronization_tag__ol798994918127"><li id="drs_synchronization_tag__li1095419541577"><span>On the <strong id="drs_synchronization_tag__b8777191917237">Data Synchronization Management</strong> page, click the target synchronization task name in the <strong id="drs_synchronization_tag__b121847664710">Task Name/ID</strong> column.</span></li><li id="drs_synchronization_tag__li18954145416571"><span>On the <strong id="drs_synchronization_tag__drs_online_tag_b818113545912">Basic Information</strong> tab, click the <strong id="drs_synchronization_tag__drs_online_tag_b1439927195810">Tags</strong> tab.</span></li><li id="drs_synchronization_tag__li3353879811230"><span>On the <span class="uicontrol" id="drs_synchronization_tag__drs_online_tag_uicontrol1874550010184218"><b>Tags</b></span> tab, click <span class="uicontrol" id="drs_synchronization_tag__drs_online_tag_uicontrol111371658118448"><b>Add Tag</b></span>. In the displayed dialog box, enter a tag key and value, and click <span class="uicontrol" id="drs_synchronization_tag__drs_online_tag_uicontrol1307702785184613"><b>OK</b></span>.</span><p><p id="drs_synchronization_tag__drs_online_tag_p77551607116"></p>
<ul id="drs_synchronization_tag__drs_online_tag_ul28256248105525"><li id="drs_synchronization_tag__drs_online_tag_li8676590301">The tag key must be unique and must consist of 1 to 36 characters. Only letters, digits, hyphens (-), sign (@), and underscores (_) are allowed.</li><li id="drs_synchronization_tag__drs_online_tag_li94049377595">The tag value can be empty or consist of 1 to 43 characters. Only letters, digits, hyphens (-), sign (@), and underscores (_) are allowed.</li><li id="drs_synchronization_tag__drs_online_tag_li1656813445712">The key of a tag cannot be <strong id="drs_synchronization_tag__drs_online_tag_b6400154211711">_sys_enterprise_project_id</strong>. <strong id="drs_synchronization_tag__drs_online_tag_b15153184791720">_sys_enterprise_project_id</strong> is a fixed tag of the enterprise project system and cannot be manually added.</li></ul>
<div class="section" id="drs_synchronization_tag__section1895751541018"><h4 class="sectiontitle">Adding a Tag</h4><ol id="drs_synchronization_tag__ol798994918127"><li id="drs_synchronization_tag__li1095419541577"><span>On the <strong id="drs_synchronization_tag__b8777191917237">Data Synchronization Management</strong> page, click the target synchronization task name in the <strong id="drs_synchronization_tag__b121847664710">Task Name/ID</strong> column.</span></li><li id="drs_synchronization_tag__li18954145416571"><span>On the <strong id="drs_synchronization_tag__drs_online_tag_b818113545912">Basic Information</strong> tab, click the <strong id="drs_synchronization_tag__drs_online_tag_b1439927195810">Tags</strong> tab.</span></li><li id="drs_synchronization_tag__li3353879811230"><span>On the <span class="uicontrol" id="drs_synchronization_tag__drs_online_tag_uicontrol1874550010184218"><b>Tags</b></span> tab, click <span class="uicontrol" id="drs_synchronization_tag__drs_online_tag_uicontrol111371658118448"><b>Add/Edit Tag</b></span>. In the displayed dialog box, enter a tag key and value, click <strong id="drs_synchronization_tag__drs_online_tag_b225457192210">Add</strong>, and click <span class="uicontrol" id="drs_synchronization_tag__drs_online_tag_uicontrol1307702785184613"><b>OK</b></span>.</span><p><p id="drs_synchronization_tag__drs_online_tag_p77551607116"></p>
<ul id="drs_synchronization_tag__drs_online_tag_ul28256248105525"><li id="drs_synchronization_tag__drs_online_tag_li8676590301">The tag key cannot be empty and must be unique. It cannot start or end with a space or start with _sys_. It can contain 1 to 128 characters, including letters, numbers, spaces, and the following characters: _ . : = + - @.</li><li id="drs_synchronization_tag__drs_online_tag_li94049377595">The tag value can be empty. It cannot start or end with a space and can contain 0 to 255 characters, including letters, numbers, spaces, and the following characters: _ . : / = + - @.</li><li id="drs_synchronization_tag__drs_online_tag_li1656813445712">The key of a tag cannot be <strong id="drs_synchronization_tag__drs_online_tag_b6400154211711">_sys_enterprise_project_id</strong>. <strong id="drs_synchronization_tag__drs_online_tag_b15153184791720">_sys_enterprise_project_id</strong> is a fixed tag of the enterprise project system and cannot be manually added.</li></ul>
</p></li><li id="drs_synchronization_tag__li60539872152925"><span>After a tag has been added, you can view and manage it on the <strong id="drs_synchronization_tag__drs_online_tag_b028219550134">Tags</strong> page.</span></li></ol>
</div>
<div class="section" id="drs_synchronization_tag__section16959151514100"><h4 class="sectiontitle">Editing a Tag</h4><ol id="drs_synchronization_tag__ol275949818322"><li id="drs_synchronization_tag__li19808414152"><span>On the <strong id="drs_synchronization_tag__drs_synchronization_tag_b8777191917237">Data Synchronization Management</strong> page, click the target synchronization task name in the <strong id="drs_synchronization_tag__drs_synchronization_tag_b121847664710">Task Name/ID</strong> column.</span></li><li id="drs_synchronization_tag__li680813114156"><span>On the <strong id="drs_synchronization_tag__drs_online_tag_b818113545912_1">Basic Information</strong> tab, click the <strong id="drs_synchronization_tag__drs_online_tag_b1439927195810_1">Tags</strong> tab.</span></li><li id="drs_synchronization_tag__li64121748162643"><span>On the <strong id="drs_synchronization_tag__drs_online_tag_b17884154114813">Tags</strong> page, click <strong id="drs_synchronization_tag__drs_online_tag_b6886104174815">Add/Edit Tags</strong>. In the displayed dialog box, modify the tag and click <strong id="drs_synchronization_tag__drs_online_tag_b1588804174814">OK</strong>.</span></li></ol>

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