GeminiDB_umn

Reviewed-by: Wagner, Fabian <fabian.wagner@t-systems.com>
Co-authored-by: wangdengke2 <wangdengke2@huawei.com>
Co-committed-by: wangdengke2 <wangdengke2@huawei.com>
This commit is contained in:
2025-09-19 10:00:40 +00:00
committed by zuul
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<div id="body1566526239327"><div class="note" id="nosql_01_0006__note1167815161239"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="nosql_01_0006__p9171127163018">The DB instance specifications depend on the selected DB engine.</p>
</div></div>
<div class="section" id="nosql_01_0006__section17517174716137"><h4 class="sectiontitle">GeminiDB Cassandra Instance Specifications</h4>
<div class="tablenoborder"><a name="nosql_01_0006__table33151750124715"></a><a name="table33151750124715"></a><table cellpadding="4" cellspacing="0" summary="" id="nosql_01_0006__table33151750124715" frame="border" border="1" rules="all"><caption><b>Table 1 </b>GeminiDB Cassandra cluster instance specifications</caption><thead align="left"><tr id="nosql_01_0006__row8316115011475"><th align="left" class="cellrowborder" valign="top" width="32%" id="mcps1.3.2.2.2.5.1.1"><p id="nosql_01_0006__p16316550194718">Specification</p>
<div class="tablenoborder"><a name="nosql_01_0006__table33151750124715"></a><a name="table33151750124715"></a><table cellpadding="4" cellspacing="0" summary="" id="nosql_01_0006__table33151750124715" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Specifications of a GeminiDB Cassandra instance in a cluster</caption><thead align="left"><tr id="nosql_01_0006__row8316115011475"><th align="left" class="cellrowborder" valign="top" width="32%" id="mcps1.3.2.2.2.5.1.1"><p id="nosql_01_0006__p16316550194718">Flavor</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="20%" id="mcps1.3.2.2.2.5.1.2"><p id="nosql_01_0006__p1331625034716">vCPUs</p>
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<a name="nosql_01_0007"></a><a name="nosql_01_0007"></a>
<h1 class="topictitle1">Compatible APIs and Versions</h1>
<div id="body1566526239327"><p id="nosql_01_0007__p26295183167">This section lists the <span id="nosql_01_0007__text936083732820">GeminiDB</span>-compatible APIs and versions.</p>
<div id="body1566526239327"><p id="nosql_01_0007__p26295183167">This section describes compatible APIs and versions supported by <span id="nosql_01_0007__text936083732820">GeminiDB</span>.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="nosql_01_0007__table281701618255" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Compatible APIs and versions</caption><thead align="left"><tr id="nosql_01_0007__row1581717166257"><th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.4.1.1"><p id="nosql_01_0007__p181751622517">Compatible API</p>
</th>
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</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.4.1.2 "><p id="nosql_01_0007__p10718819165814">Cluster</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.4.1.3 "><p id="nosql_01_0007__p178173167253">3.11</p>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.4.1.3 "><p id="nosql_01_0007__p178173167253">3.11 and 4.0</p>
</td>
</tr>
</tbody>
</table>
</div>
<p id="nosql_01_0007__p20709434163216">GeminiDB is not completely compatible with Cassandra 3.11 and 4.0, so you need to test the compatibility before using GeminiDB Cassandra API.</p>
</div>
<div>
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<a name="nosql_02_0116"></a><a name="nosql_02_0116"></a>
<h1 class="topictitle1">Restoring a Backup to a Specified Point in Time</h1>
<div id="body1595474217470"><div class="section" id="nosql_02_0116__section20967309195347"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_02_0116__p12711205853313">Existing automated backups can be restored to a specified point in time on a GeminiDB Cassandra instance.</p>
<p id="nosql_02_0116__p97111158173315">The most recent full backup will be downloaded from OBS for restoration. After the restoration is complete, incremental backups will be replayed to the specified point in time. The time required depends on the amount of data to be restored.</p>
</div>
<div class="section" id="nosql_02_0116__section213410193216"><h4 class="sectiontitle">Usage Notes</h4><ul id="nosql_02_0116__ul9190163311348"><li id="nosql_02_0116__li6190113314342">This feature is available only to new GeminiDB Cassandra instances.</li><li id="nosql_02_0116__li2190733193420">After the automated backup policy is enabled, the system performs an incremental backup based on the preset interval. The incremental backup data is stored in OBS.</li></ul>
<ul id="nosql_02_0116__ul719053316349"><li id="nosql_02_0116__li1119023363417">Data can be restored to a specified time point only after the automated backup policy is enabled.</li><li id="nosql_02_0116__li51901033133416">During instance restoration, backups are downloaded from the OBS bucket to the data directory of the restored instance.</li></ul>
</div>
<div class="section" id="nosql_02_0116__section189359417525"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_02_0116__ol10937748529"><li id="nosql_02_0116__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_02_0116__li34566410153117"><span>On the <strong id="nosql_02_0116__b998616102573">Instances</strong> page, click the target <span id="nosql_02_0116__text698701025716">GeminiDB Cassandra</span> instance.</span></li><li id="nosql_02_0116__li187932301440"><span>In the navigation pane on the left, click <span class="uicontrol" id="nosql_02_0116__uicontrol2063522410211"><b>Backups &amp; Restorations</b></span>.</span></li><li id="nosql_02_0116__li56577057154136"><span>On the <strong id="nosql_02_0116__b143237278214">Backups &amp; Restorations</strong> page, click <span class="uicontrol" id="nosql_02_0116__uicontrol032510271228"><b>Restore to Point In Time</b></span>.</span><p><div class="fignone" id="nosql_02_0116__fig12895422195110"><span class="figcap"><b>Figure 1 </b>Restoring data to a specified point in time</span><br><span><img id="nosql_02_0116__image789542215515" src="en-us_image_0000002200454268.png"></span></div>
</p></li><li id="nosql_02_0116__li292666312"><span>Select the restoration date and the time point to which the data is restored and then click <strong id="nosql_02_0116__b14545101495716">OK</strong>.</span><p><div class="fignone" id="nosql_02_0116__fig1097101985219"><span class="figcap"><b>Figure 2 </b>Restore to Point in Time</span><br><span><img id="nosql_02_0116__image10977191526" src="en-us_image_0000002200454892.png"></span></div>
</p></li><li id="nosql_02_0116__li1666195115133"><span>On the displayed <span class="menucascade" id="nosql_02_0116__menucascade12787134717271"><b><span class="uicontrol" id="nosql_02_0116__uicontrol1978711475271">Create New Instance</span></b></span> page, create a DB instance of the same specifications as the DB instance to be restored. The new DB instance is independent from the original one.</span><p><ul id="nosql_02_0116__ul47340213174014"><li id="nosql_02_0116__li3477171483016">You are recommended to deploy the restored DB instance in a different AZ to ensure that your applications will not be adversely affected by the failure in any single AZ.</li><li id="nosql_02_0116__li13824155912588">The compatible API, DB instance type, DB instance version, and CPU type are the same as those of the original and cannot be changed.</li><li id="nosql_02_0116__li114141250185718">Other settings are the same as those of the original instance by default and can be modified. For details, see <a href="nosql_06_0003.html">Creating a GeminiDB Cassandra Instance</a>.</li></ul>
</p></li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="nosql_03_0006.html">Backups and Restorations</a></div>
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</li>
<li class="ulchildlink"><strong><a href="nosql_increase_storage.html">Scaling Up Storage Space</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_increase_storage1.html">Configuring Auto Scale</a></strong><br>
<li class="ulchildlink"><strong><a href="nosql_increase_storage1.html">Configuring Autoscaling</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0026.html">Changing the CPU and Memory of an Instance</a></strong><br>
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</li>
<li class="ulchildlink"><strong><a href="nosql_03_0008.html">Managing Manual Backups</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0009.html">Restoring Data to a New DB Instance</a></strong><br>
<li class="ulchildlink"><strong><a href="nosql_03_0009.html">Restoring a Backup to a New Instance</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_02_0116.html">Restoring a Backup to a Specified Point in Time</a></strong><br>
</li>
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<a name="nosql_03_0009"></a><a name="nosql_03_0009"></a>
<h1 class="topictitle1">Restoring Data to a New DB Instance</h1>
<div id="body1561796825410"><div class="section" id="nosql_03_0009__section3037032812838"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_03_0009__p2898859142259"><span id="nosql_03_0009__text59721931194419">GeminiDB Cassandra</span> API allows you to restore the existing backup to a new DB instance.</p>
<h1 class="topictitle1">Restoring a Backup to a New Instance</h1>
<div id="body1561796825410"><div class="section" id="nosql_03_0009__section3037032812838"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_03_0009__p2898859142259">You can restore an existing backup to a new <span id="nosql_03_0009__text59721931194419">GeminiDB Cassandra</span> instance.</p>
</div>
<div class="section" id="nosql_03_0009__section1517018587283"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0009__ol3169892816474"><li id="nosql_03_0009__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0009__li4533738135159"><span>Restore a DB instance from the backup.</span><p><p id="nosql_03_0009__p421782611362"><strong id="nosql_03_0009__b8423527061662">Method 1</strong></p>
<div class="section" id="nosql_03_0009__section1517018587283"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_03_0009__ol3169892816474"><li id="nosql_03_0009__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_03_0009__li4533738135159"><span>Restore a backup.</span><p><p id="nosql_03_0009__p421782611362"><strong id="nosql_03_0009__b8423527061662">Method 1</strong></p>
<ol type="a" id="nosql_03_0009__ol142518471376"><li id="nosql_03_0009__li125164713373">On the <strong id="nosql_03_0009__b84235270615219">Instance Management</strong> page, click the target DB instance.</li><li id="nosql_03_0009__li1191285315378">On the <span class="uicontrol" id="nosql_03_0009__uicontrol2380715141811"><b>Backups &amp; Restorations</b></span> page, locate the target backup and click <span class="uicontrol" id="nosql_03_0009__uicontrol938111153187"><b>Restore</b></span>.</li></ol>
<p id="nosql_03_0009__p11747207164319"><strong id="nosql_03_0009__b1218305212161736">Method 2</strong></p>
<p id="nosql_03_0009__p87441650204314">On the <span class="uicontrol" id="nosql_03_0009__uicontrol13891350171813"><b>Backup Management</b></span> page, locate the target backup and click <span class="uicontrol" id="nosql_03_0009__uicontrol1490195061817"><b>Restore</b></span>.</p>
</p></li><li id="nosql_03_0009__li1263239616537"><span>In the displayed dialog box, confirm the current instance details and restoration method and click <strong id="nosql_03_0009__b0443717165420">OK</strong>.</span><p><ul id="nosql_03_0009__ul77342022805"><li id="nosql_03_0009__li2734122605">The default API type and DB engine version are the same as those of the original instance and cannot be changed. </li><li id="nosql_03_0009__li1973472217017">GeminiDB automatically calculates the minimum storage space required for restoration based on the size of the selected backup file. The storage space depends on the instance specifications, and must be a multiple of 10 GB.</li><li id="nosql_03_0009__li1373415221903">You need to set a new administrator password.</li></ul>
</p></li><li id="nosql_03_0009__li1263239616537"><span>In the displayed dialog box, confirm the current instance details and restoration method and click <strong id="nosql_03_0009__b0443717165420">OK</strong>.</span><p><ul id="nosql_03_0009__ul77342022805"><li id="nosql_03_0009__li2734122605">The default API type and DB engine version are the same as those of the original instance and cannot be changed. </li><li id="nosql_03_0009__li1973472217017">The system automatically calculates the minimum storage space required for restoring the new instance based on the size of the selected backup file. The storage space must be an integer multiple of 1.</li><li id="nosql_03_0009__li1373415221903">You need to set a new administrator password.</li></ul>
<ul id="nosql_03_0009__ul11734112216016"><li id="nosql_03_0009__li1973417221008">To modify other parameters, see the description of creating DB instances of other DB engines in the <em id="nosql_03_0009__i13971346101616">Getting Started</em>.</li></ul>
</p></li><li id="nosql_03_0009__li28057821151656"><span>View the restoration results.</span><p><p id="nosql_03_0009__p13927141814199">A new DB instance is created using the backup data. The status of the DB instance changes from <strong id="nosql_03_0009__b3829408514">Creating</strong> to <strong id="nosql_03_0009__b153416443516">Available</strong>.</p>
<p id="nosql_03_0009__p12580181415516">After the restoration, the system will perform a full backup.</p>

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</div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="nosql_03_0011.html">GeminiDB Cassandra Metrics</a></strong><br>
<li class="ulchildlink"><strong><a href="nosql_03_0011.html">GeminiDB Cassandra Instance Metrics</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="nosql_03_0012.html">Setting Alarm Rules</a></strong><br>
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<tbody><tr id="nosql_04_change_history__row492196114119"><td class="cellrowborder" valign="top" width="30.37%" headers="mcps1.3.1.1.3.1.1 "><p id="nosql_04_change_history__p15928610416">2025-02-28</p>
</td>
<td class="cellrowborder" valign="top" width="69.63000000000001%" headers="mcps1.3.1.1.3.1.2 "><p id="nosql_04_change_history__p10923613418">This issue is the ninth official release.</p>
<p id="nosql_04_change_history__p18787193414112">Added <a href="nosql_02_0116.html">Restoring a Backup to a Specified Point in Time</a>.</p>
</td>
</tr>
<tr id="nosql_04_change_history__row146291538191214"><td class="cellrowborder" valign="top" width="30.37%" headers="mcps1.3.1.1.3.1.1 "><p id="nosql_04_change_history__p516519488128">2024-11-30</p>
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<tr id="nosql_04_change_history__row1387432312129"><td class="cellrowborder" valign="top" width="30.37%" headers="mcps1.3.1.1.3.1.1 "><p id="nosql_04_change_history__p1778414310125">2024-08-30</p>
</td>
<td class="cellrowborder" valign="top" width="69.63000000000001%" headers="mcps1.3.1.1.3.1.2 "><p id="nosql_04_change_history__p12874152316129">This issue is the seventh official release, which incorporates the following change:</p>
<p id="nosql_04_change_history__p6944191661317">Added <a href="nosql_increase_storage1.html">Configuring Auto Scale</a>.</p>
<p id="nosql_04_change_history__p6944191661317">Added <a href="nosql_increase_storage1.html">Configuring Autoscaling</a>.</p>
</td>
</tr>
<tr id="nosql_04_change_history__row694017392613"><td class="cellrowborder" valign="top" width="30.37%" headers="mcps1.3.1.1.3.1.1 "><p id="nosql_04_change_history__p16977317172613">2024-04-30</p>
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<tr id="nosql_04_change_history__row147019149159"><td class="cellrowborder" valign="top" width="30.37%" headers="mcps1.3.1.1.3.1.1 "><p id="nosql_04_change_history__p104707147150">2020-11-30</p>
</td>
<td class="cellrowborder" valign="top" width="69.63000000000001%" headers="mcps1.3.1.1.3.1.2 "><p id="nosql_04_change_history__p194251038101217">This issue is the third official release, which incorporates the following changes:</p>
<p id="nosql_04_change_history__p18538184016500"><a href="nosql_03_0011.html">GeminiDB Cassandra Metrics</a></p>
<p id="nosql_04_change_history__p18538184016500"><a href="nosql_03_0011.html">GeminiDB Cassandra Instance Metrics</a></p>
<p id="nosql_04_change_history__p191512165516"><a href="nosql_03_0012.html">Setting Alarm Rules</a></p>
<p id="nosql_04_change_history__p886163514514"><a href="nosql_03_0013.html">Viewing Metrics</a></p>
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<td class="cellrowborder" valign="top" width="73%" headers="mcps1.3.2.2.3.2.1.2.3.1.2 "><p id="nosql_06_0003__en-us_topic_0000001092187220_p299094411596">Cassandra</p>
</td>
</tr>
<tr id="nosql_06_0003__en-us_topic_0000001092187220_row202031434163815"><td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.3.2.1.2.3.1.1 "><p id="nosql_06_0003__en-us_topic_0000001092187220_p12031345381">DB Instance Type</p>
<tr id="nosql_06_0003__en-us_topic_0000001092187220_row202031434163815"><td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.3.2.1.2.3.1.1 "><p id="nosql_06_0003__p682815240572">DB Instance Type</p>
</td>
<td class="cellrowborder" valign="top" width="73%" headers="mcps1.3.2.2.3.2.1.2.3.1.2 "><p id="nosql_06_0003__en-us_topic_0000001092187220_p152031134173817">Cluster</p>
<p id="nosql_06_0003__p19241792710">One cluster consists of at least three nodes. A cluster is easy to scale out to meet increasing data growth needs. A cluster is recommended if you have high requirements on availability, large volume of data, and future scalability.</p>
</td>
</tr>
<tr id="nosql_06_0003__en-us_topic_0000001092187220_row699016440598"><td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.3.2.1.2.3.1.1 "><p id="nosql_06_0003__en-us_topic_0000001092187220_p1299014443595">DB Engine Version</p>
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</tr>
<tr id="nosql_06_0003__en-us_topic_0000001092187220_row5991544195912"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.2.2.3.2.2.2.3.1.1 "><p id="nosql_06_0003__en-us_topic_0000001092187220_p299119448594">Storage Space</p>
</td>
<td class="cellrowborder" valign="top" width="72%" headers="mcps1.3.2.2.3.2.2.2.3.1.2 "><p id="nosql_06_0003__en-us_topic_0000001092187220_p9991544125920">Storage space depends on the instance specifications. The minimum storage space is 10 GB, and the storage space you set must be an integer. You can select a minimum of 10 GB each time.</p>
<td class="cellrowborder" valign="top" width="72%" headers="mcps1.3.2.2.3.2.2.2.3.1.2 "><p id="nosql_06_0003__en-us_topic_0000001092187220_p9991544125920">The storage space varies depending on the instance specifications. The minimum storage is 10 GB. To scale up storage, you need to add at least 10 GB each time. The value must be an integer.</p>
<p id="nosql_06_0003__en-us_topic_0000001092187220_p0276103719467">After a DB instance is created, you can scale up its storage space. For details, see <a href="nosql_increase_storage.html">Scaling Up Storage Space</a>.</p>
<p id="nosql_06_0003__p174817512617">When configuring storage space of a GeminiDB Cassandra instance, you are advised to enable autoscaling. Then set trigger conditions and limit of autoscaling. After autoscaling is triggered, the system automatically scales up the storage to ensure that the instance has sufficient storage and keeps available. </p>
<div class="fignone" id="nosql_06_0003__fig69401752125613"><span class="figcap"><b>Figure 1 </b>Auto Scale</span><br><span><img id="nosql_06_0003__image3940205255619" src="en-us_image_0000002067697405.png"></span></div>
<p id="nosql_06_0003__p213624512166">Pay attention to the following parameters:</p>
<ul id="nosql_06_0003__ul14921759434"><li id="nosql_06_0003__li849285916316"><strong id="nosql_06_0003__b44681135184411">Trigger If Available Storage Drops To</strong>: storage threshold for triggering autoscaling. When the available storage usage drops to this value or the available storage space drops to 10 GB, autoscaling is triggered.</li><li id="nosql_06_0003__li1460452210517"><strong id="nosql_06_0003__b438863211459">Increase By</strong>: percentage that your instance storage will be scaled up at. If the increased storage is not a multiple of 10 GB, the system will round it up to the nearest multiple of 10 GB. At least 100 GB is added each time.</li><li id="nosql_06_0003__li18291632064"><strong id="nosql_06_0003__b195114456528">Storage Limit</strong>: maximum amount that the system can automatically scale up an instance's storage space to. The value must be no less than the current storage of your instance and cannot exceed the storage space upper limit defined by your instance specifications.</li></ul>
<div class="note" id="nosql_06_0003__note155264132318"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="nosql_06_0003__ul256618914269"><li id="nosql_06_0003__li1656620916265">Once autoscaling is enabled, an agency will be created and fees will be automatically deducted.</li><li id="nosql_06_0003__li1589771122612">You can enable autoscaling after an instance is created. For details, see <a href="nosql_increase_storage1.html">Configuring Auto Scale</a>.</li></ul>
<ul id="nosql_06_0003__ul14921759434"><li id="nosql_06_0003__li849285916316"><strong id="nosql_06_0003__b44681135184411">Trigger If Available Storage Drops To</strong>: storage threshold for triggering autoscaling. When the available storage usage drops to this value or the available storage space drops to 10 GB, autoscaling is triggered.</li><li id="nosql_06_0003__li1460452210517"><strong id="nosql_06_0003__b438863211459">Increase By</strong>: percentage that your instance storage will be scaled up at. If the increased storage is not a multiple of 10 GB, the system will round it up to the nearest multiple of 10 GB. At least 100 GB is added each time.</li><li id="nosql_06_0003__li18291632064"><strong id="nosql_06_0003__b195114456528">Storage Limit</strong>: maximum amount that the system can automatically scale up an instance's storage space to. The value must be no less than the current storage of your instance and cannot exceed the maximum storage supported by your instance.</li></ul>
<div class="note" id="nosql_06_0003__note155264132318"><span class="notetitle"> NOTE: </span><div class="notebody"><ul id="nosql_06_0003__ul256618914269"><li id="nosql_06_0003__li1656620916265">Once autoscaling is enabled, an agency will be created and fees will be automatically deducted.</li><li id="nosql_06_0003__li1589771122612">You can enable autoscaling after an instance is created. For details, see <a href="nosql_increase_storage1.html">Configuring Autoscaling</a>.</li></ul>
</div></div>
</td>
</tr>
@ -152,7 +153,7 @@
</thead>
<tbody><tr id="nosql_06_0003__en-us_topic_0000001092187220_row1797612015323"><td class="cellrowborder" valign="top" width="27%" headers="mcps1.3.2.2.3.2.5.2.3.1.1 "><p id="nosql_06_0003__en-us_topic_0000001092187220_en-us_topic_0085335437_p1221015159617">Tags</p>
</td>
<td class="cellrowborder" valign="top" width="73%" headers="mcps1.3.2.2.3.2.5.2.3.1.2 "><p id="nosql_06_0003__en-us_topic_0000001092187220_p874773375418">The setting is optional. Adding tags helps you better identify and manage your DB instances. Up to <span id="nosql_06_0003__en-us_topic_0000001092187220_text1010794017439"></span><span id="nosql_06_0003__en-us_topic_0000001092187220_text4600345114318">20</span> tags can be added for each instance.</p>
<td class="cellrowborder" valign="top" width="73%" headers="mcps1.3.2.2.3.2.5.2.3.1.2 "><p id="nosql_06_0003__en-us_topic_0000001092187220_p874773375418">The setting is optional. Adding tags helps you better identify and manage your DB instances. You can add a maximum of <span id="nosql_06_0003__text145951410105"></span><span id="nosql_06_0003__text17595201014016">20</span> tags for each instance.</p>
<p id="nosql_06_0003__en-us_topic_0000001092187220_en-us_topic_0085335437_p791635119297">A tag is composed of a key-value pair.</p>
<ul id="nosql_06_0003__en-us_topic_0000001092187220_en-us_topic_0085335437_ul73781026122214"><li id="nosql_06_0003__en-us_topic_0000001092187220_en-us_topic_0085335437_li103790268221">Key: Mandatory if the DB instance is going to be tagged<p id="nosql_06_0003__en-us_topic_0000001092187220_p17237151272415"><a name="nosql_06_0003__en-us_topic_0000001092187220_en-us_topic_0085335437_li103790268221"></a><a name="en-us_topic_0000001092187220_en-us_topic_0085335437_li103790268221"></a>Each tag key is unique for each instance. The key can include up to 36 characters, including digits, letters, underscores (_), and hyphens (-).</p>
</li><li id="nosql_06_0003__en-us_topic_0000001092187220_en-us_topic_0085335437_li1240572613229">Value: Optional if the DB instance is going to be tagged<p id="nosql_06_0003__en-us_topic_0000001092187220_p79231957152518"><a name="nosql_06_0003__en-us_topic_0000001092187220_en-us_topic_0085335437_li1240572613229"></a><a name="en-us_topic_0000001092187220_en-us_topic_0085335437_li1240572613229"></a>The value can contain up to 43 characters, including digits, letters, underscores (_), periods (.), and hyphens (-).</p>

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<div id="body1566356869818"><div class="section" id="nosql_increase_storage__section0705838113813"><h4 class="sectiontitle">Scenarios</h4><p id="nosql_increase_storage__p198051919142515">This section describes how to scale up the storage space of a DB instance to suit your service requirements.</p>
<p id="nosql_increase_storage__p815512142226">During the scale-up process, the DB instance will not restart, and your services will not be interrupted.</p>
</div>
<div class="section" id="nosql_increase_storage__section446061684012"><h4 class="sectiontitle">Precautions</h4><p id="nosql_increase_storage__p3116115884018">Storage space can only be scaled up. It cannot be scaled down.</p>
<div class="section" id="nosql_increase_storage__section446061684012"><h4 class="sectiontitle">Usage Notes</h4><p id="nosql_increase_storage__p3116115884018">Storage space can only be scaled up.</p>
</div>
<div class="section" id="nosql_increase_storage__section10794192521015"><h4 class="sectiontitle">Procedure</h4><ol id="nosql_increase_storage__ol9213165010343"><li id="nosql_increase_storage__li1374519431356"><span><a href="nosql_login.html">Log in to the GeminiDB console.</a></span></li><li id="nosql_increase_storage__li1871461413595"><span>On the <strong id="nosql_increase_storage__b122991844182111">Instances</strong> page, click the target instance name.</span></li><li id="nosql_increase_storage__l3af6a9cc8c404c93b5c915fc46a3aaac"><span>In the <span class="uicontrol" id="nosql_increase_storage__uicontrol7505195410396"><b>Storage Space</b></span> area on the <span class="uicontrol" id="nosql_increase_storage__uicontrol25111154113911"><b>Basic Information</b></span> page, click <span class="uicontrol" id="nosql_increase_storage__uicontrol11512654113919"><b>Scale</b></span>.</span></li><li id="nosql_increase_storage__li1539374910265"><span>On the displayed page, specify the new storage capacity and click <strong id="nosql_increase_storage__b194431973117">Next</strong>.</span><p><p id="nosql_increase_storage__p3603382193548">Select at least 1 GB each time you scale up the storage, and the storage size must be an integer.</p>
</p></li><li id="nosql_increase_storage__li103961052112310"><span>On the displayed page, confirm the storage space.</span><p><ul id="nosql_increase_storage__ul15396552132312"><li id="nosql_increase_storage__li839615216237">If you need to modify your settings, click <strong id="nosql_increase_storage__b537584918183">Previous</strong> to go back to the page where you specify details.</li><li id="nosql_increase_storage__li5396105220234">If you do not need to modify your settings, click <strong id="nosql_increase_storage__b19147527185">Submit</strong> to scale up the storage space.</li></ul>

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<a name="nosql_increase_storage1"></a><a name="nosql_increase_storage1"></a>
<h1 class="topictitle1">Configuring Auto Scale</h1>
<h1 class="topictitle1">Configuring Autoscaling</h1>
<div id="body0000002002225076"><p id="nosql_increase_storage1__p186192374518">You can enable autoscaling for GeminiDB Cassandra instances. When storage usage reaches the limit, autoscaling is triggered.</p>
<p id="nosql_increase_storage1__p119711841104310">You can enable autoscaling:</p>
<ol id="nosql_increase_storage1__ol2828214162314"><li id="nosql_increase_storage1__li082810147234"><p id="nosql_increase_storage1__p11240937339"><a name="nosql_increase_storage1__li082810147234"></a><a name="li082810147234"></a>When creating an instance</p>
@ -61,7 +61,7 @@
<tr id="nosql_increase_storage1__row095219200433"><td class="cellrowborder" valign="top" width="21.709999999999997%" headers="mcps1.3.8.2.4.2.2.2.3.1.1 "><p id="nosql_increase_storage1__p995216200432">Storage Limit</p>
</td>
<td class="cellrowborder" valign="top" width="78.29%" headers="mcps1.3.8.2.4.2.2.2.3.1.2 "><p id="nosql_increase_storage1__p754513482219">Limit of storage (GB) that can be automatically scaled to.</p>
<p id="nosql_increase_storage1__p6642006204">The value must be no less than the current storage of your instance and cannot exceed the storage space upper limit defined by your instance specifications.</p>
<p id="nosql_increase_storage1__p6642006204">The value must be no less than the current storage of your instance and cannot exceed the maximum storage supported by your instance.</p>
</td>
</tr>
</tbody>
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</tr>
<tr id="nosql_increase_storage1__row07425561575"><td class="cellrowborder" valign="top" width="21.709999999999997%" headers="mcps1.3.9.2.3.2.2.2.3.1.1 "><p id="nosql_increase_storage1__p1674225615714">Increase By</p>
</td>
<td class="cellrowborder" valign="top" width="78.29%" headers="mcps1.3.9.2.3.2.2.2.3.1.2 "><p id="nosql_increase_storage1__p1743856474">Percentage of the current storage to be automatically scaled. The value can be <strong id="nosql_increase_storage1__b479958951">10</strong>, <strong id="nosql_increase_storage1__b508836689">15</strong>, or <strong id="nosql_increase_storage1__b1952408402">20</strong>. If the value is not a multiple of 10, the value is rounded up. At least 100 GB is added each time.</p>
<td class="cellrowborder" valign="top" width="78.29%" headers="mcps1.3.9.2.3.2.2.2.3.1.2 "><p id="nosql_increase_storage1__p1743856474">Percentage of the current storage to be automatically scaled. The value can be <strong id="nosql_increase_storage1__b105598433">10</strong>, <strong id="nosql_increase_storage1__b480032310">15</strong>, or <strong id="nosql_increase_storage1__b208062006">20</strong>. If the value is not a multiple of 10, the value is rounded up. At least 100 GB is added each time.</p>
</td>
</tr>
<tr id="nosql_increase_storage1__row1474312568711"><td class="cellrowborder" valign="top" width="21.709999999999997%" headers="mcps1.3.9.2.3.2.2.2.3.1.1 "><p id="nosql_increase_storage1__p13743205619710">Storage Limit</p>