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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-9456] Add a command and shell helper to check if a collection is fully balanced</title>
                <link>https://jira.mongodb.org/browse/SERVER-9456</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Add a new command and a corresponding shell helper &lt;tt&gt;sh.isBalanced(collection)&lt;/tt&gt; to check if a collection is fully balanced and that the balancer won&apos;t take any action on it. This would take into account the &lt;a href=&quot;http://docs.mongodb.org/manual/core/sharded-cluster-internals/#migration-thresholds&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Migration Thresholds&lt;/a&gt; for balancing and determine if a collection is currently balanced.&lt;/p&gt;</description>
                <environment></environment>
        <key id="73057">SERVER-9456</key>
            <summary>Add a command and shell helper to check if a collection is fully balanced</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="2">Won&apos;t Fix</resolution>
                                        <assignee username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="stephen.steneker@mongodb.com">Stennie Steneker</reporter>
                        <labels>
                    </labels>
                <created>Thu, 25 Apr 2013 08:07:30 +0000</created>
                <updated>Tue, 16 May 2017 20:14:03 +0000</updated>
                            <resolved>Tue, 16 May 2017 20:13:08 +0000</resolved>
                                                                    <component>Sharding</component>
                    <component>Shell</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1572721" author="kaloian.manassiev" created="Tue, 16 May 2017 20:13:08 +0000"  >&lt;p&gt;Given the transient nature of what it means for a collection to be balanced, such as auto-split, zones, shard addition and removal, we do not see a good use case for supporting such a command. The time would be better invested into making the balancer as seamless and as non-intrusive as possible, rather than exposing more insight into its run-time state.&lt;/p&gt;

&lt;p&gt;In the meantime, we have the balancer &lt;a href=&quot;https://docs.mongodb.com/manual/reference/command/balancerStart&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;start&lt;/a&gt; and &lt;a href=&quot;https://docs.mongodb.com/manual/reference/command/balancerStop/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;stop&lt;/a&gt; commands, which allow the balancer to be controlled in case it interferes with live workload.&lt;/p&gt;</comment>
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