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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-26770] Sharding balancer moves chunks from shards whose utilization is below the cluster average</title>
                <link>https://jira.mongodb.org/browse/SERVER-26770</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The sharding balancer does not consult the optimal per shard chunk count when deciding to move chunks out of a shard and because of this causes chunks to move from shards with below-average number of entries to even less loaded shards, thus causing unnecessary churn.&lt;/p&gt;</description>
                <environment></environment>
        <key id="326773">SERVER-26770</key>
            <summary>Sharding balancer moves chunks from shards whose utilization is below the cluster average</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="9">Done</resolution>
                                        <assignee username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Tue, 25 Oct 2016 19:48:54 +0000</created>
                <updated>Mon, 31 Oct 2016 13:31:29 +0000</updated>
                            <resolved>Thu, 27 Oct 2016 13:37:47 +0000</resolved>
                                    <version>3.4.0-rc1</version>
                                    <fixVersion>3.4.0-rc2</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1419394" author="xgen-internal-githook" created="Thu, 27 Oct 2016 13:35:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26770&quot; title=&quot;Sharding balancer moves chunks from shards whose utilization is below the cluster average&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26770&quot;&gt;&lt;del&gt;SERVER-26770&lt;/del&gt;&lt;/a&gt; Do not move chunks out of shards with below-average utilization&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cc75cf210c63a0c96c74e01f3919938ea64a0317&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cc75cf210c63a0c96c74e01f3919938ea64a0317&lt;/a&gt;&lt;/p&gt;</comment>
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