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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-74745] Use `mergeAllChunksOnShard` for defragmentation</title>
                <link>https://jira.mongodb.org/browse/SERVER-74745</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, defragmentation is issuing subsequent merge requests for each sequence of contiguous chunks and it is &lt;a href=&quot;https://github.com/mongodb/mongo/blob/49320a8df6dad547f4465e5ac32b156fd4343400/src/mongo/db/s/balancer/balancer_defragmentation_policy_impl.cpp#L390&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;making sure&lt;/a&gt; that chunks honor the chunk size.&lt;/p&gt;

&lt;p&gt;Purpose of this ticket is to:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Stop honoring the chunk size because starting from 6.0.3 chunks can be of arbitrary sizes.&lt;/li&gt;
	&lt;li&gt;Rely on &lt;tt&gt;mergeAllChunksOnShard&lt;/tt&gt; (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71612&quot; title=&quot;Implement `mergeAllChunksOnShard` in the sharding catalog manager&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71612&quot;&gt;&lt;del&gt;SERVER-71612&lt;/del&gt;&lt;/a&gt;) instead of issuing simple merges&lt;/li&gt;
&lt;/ul&gt;
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                <environment></environment>
        <key id="2285696">SERVER-74745</key>
            <summary>Use `mergeAllChunksOnShard` for defragmentation</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-catalog-and-routing">Backlog - Catalog and Routing</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                            <label>oldshardingemea</label>
                            <label>shardingemea-qw</label>
                    </labels>
                <created>Fri, 10 Mar 2023 14:46:12 +0000</created>
                <updated>Thu, 26 Oct 2023 10:11:16 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>1</watches>
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