forked from docs/doc-exports
Wuwan, Qi
050b395397
Reviewed-by: Kacur, Michal <michal.kacur@t-systems.com> Co-authored-by: Wuwan, Qi <wuwanqi1@noreply.gitea.eco.tsi-dev.otc-service.com> Co-committed-by: Wuwan, Qi <wuwanqi1@noreply.gitea.eco.tsi-dev.otc-service.com>
23 lines
6.0 KiB
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23 lines
6.0 KiB
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<a name="css_01_0154"></a><a name="css_01_0154"></a>
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<h1 class="topictitle1">Removing Specified Nodes</h1>
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<div id="body0000001338468977"><p id="css_01_0154__en-us_topic_0000001338468977_p18220112044212">If a cluster can process existing data without fully using its nodes, you can remove one or more specified nodes from the cluster to reduce costs. Services will not be interrupted during the removal of specified nodes.</p>
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<div class="section" id="css_01_0154__en-us_topic_0000001338468977_section11686944145218"><h4 class="sectiontitle">Prerequisites</h4><p id="css_01_0154__en-us_topic_0000001338468977_p11955155417393">The target cluster is available and has no tasks in progress.</p>
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<div class="section" id="css_01_0154__en-us_topic_0000001338468977_section12477125117522"><h4 class="sectiontitle">Constraints</h4><ul id="css_01_0154__en-us_topic_0000001338468977_ul4155162820100"><li id="css_01_0154__en-us_topic_0000001338468977_li108232692012">Ensure that the disk usage after scale-in is less than 80% and each AZ of each node type has at least one node.</li><li id="css_01_0154__en-us_topic_0000001338468977_li1176612232246">In a cross-AZ cluster, the difference between the numbers of the same type nodes in different AZs cannot exceed 1.</li><li id="css_01_0154__en-us_topic_0000001338468977_li16801597451">For a cluster without master nodes, the number of removed data nodes and cold data nodes in a scale-in must be fewer than half of the original number of data nodes and cold data nodes, and the number of remaining data nodes and cold data nodes after a scale-in must be greater than the maximum number of index replicas.</li><li id="css_01_0154__en-us_topic_0000001338468977_li973819931412">For a cluster with master nodes, the number of removed master nodes in a scale-in must be fewer than half of the original master node number. After scale-in, there has to be an odd number of master nodes, and there has to be at least three of them.</li></ul>
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<div class="section" id="css_01_0154__en-us_topic_0000001338468977_section1177713055318"><h4 class="sectiontitle">Procedure</h4><ol id="css_01_0154__en-us_topic_0000001338468977_ol373518361145"><li id="css_01_0154__en-us_topic_0000001338468977_li1173513611411">Log in to the <span id="css_01_0154__en-us_topic_0000001338468977_text197351036151410">CSS</span> management console.</li><li id="css_01_0154__li108716541501">In the navigation pane, choose a cluster type. The cluster management page is displayed.</li><li id="css_01_0154__en-us_topic_0000001285669680_li17735636141417">Choose <strong id="css_01_0154__b17856132710222">More</strong> > <strong id="css_01_0154__b198568271223">Modify Configuration</strong> in the <strong id="css_01_0154__b13857122732216">Operation</strong> column of the target cluster. The <strong id="css_01_0154__b385742711225">Modify Configuration</strong> page is displayed.</li><li id="css_01_0154__en-us_topic_0000001338468977_li239201117417">On the <strong id="css_01_0154__en-us_topic_0000001338468977_b5958182191917">Modify Configuration</strong> page, click the <strong id="css_01_0154__en-us_topic_0000001338468977_b59581121151915">Scale In</strong> tab.</li><li id="css_01_0154__li37631229090">On the <strong id="css_01_0154__b13994131422214">Scale In</strong> tab page, set the following parameters:<ul id="css_01_0154__ul142964491791"><li id="css_01_0154__li9296134918913"><span class="parmname" id="css_01_0154__parmname2088915275016"><b>Agency</b></span>: Select an IAM agency to grant the current account the permission to switch AZs.<p id="css_01_0154__en-us_topic_0000001438549444_p697283115108">If no agency is available, click <span class="uicontrol" id="css_01_0154__uicontrol1657755585016"><b>Create IAM Agency</b></span> to go to the IAM console and create an agency.</p>
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<div class="note" id="css_01_0154__en-us_topic_0000001438549444_note9969917163718"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="css_01_0154__en-us_topic_0000001438549444_p1970121723714">The selected agency must be assigned the <strong id="css_01_0154__b14708155785011">Tenant Administrator</strong> or <strong id="css_01_0154__b10709175715011">VPC Administrator</strong> policy.</p>
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</div></div>
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</li></ul>
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<ul id="css_01_0154__ul64844511897"><li id="css_01_0154__li048435118911"><span class="parmname" id="css_01_0154__parmname318194201019"><b>Whether to perform data migration</b></span>: If this option is selected, data migration is performed. If the target node contains disabled indexes or indexes that have no replicas, this option must be selected.</li><li id="css_01_0154__li328734291018">In the data node table, select the node to be scaled in.</li></ul>
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</li><li id="css_01_0154__en-us_topic_0000001338468977_li173623641418">Click <span class="uicontrol" id="css_01_0154__uicontrol1865761917109"><b>Next</b></span>.</li><li id="css_01_0154__en-us_topic_0000001338468977_li462507104311">Confirm the information and click <strong id="css_01_0154__en-us_topic_0000001338468977_b0322651152714">Submit</strong>.</li><li id="css_01_0154__en-us_topic_0000001338468977_li13737436141418">Click <span class="uicontrol" id="css_01_0154__en-us_topic_0000001338468977_uicontrol17971144202913"><b>Back to Cluster List</b></span> to switch to the <strong id="css_01_0154__en-us_topic_0000001338468977_b480424442912">Clusters</strong> page. The <span class="parmname" id="css_01_0154__en-us_topic_0000001338468977_parmname14976203323714"><b>Task Status</b></span> is <span class="parmvalue" id="css_01_0154__en-us_topic_0000001338468977_parmvalue19824339375"><b>Scaling in</b></span>. When <span class="parmname" id="css_01_0154__en-us_topic_0000001338468977_parmname4178951132918"><b>Cluster Status</b></span> changes to <span class="parmvalue" id="css_01_0154__en-us_topic_0000001338468977_parmvalue13177185162918"><b>Available</b></span>, the cluster has been successfully scaled in.</li></ol>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="css_01_0149.html">Changing the Elasticsearch Cluster Form</a></div>
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