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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-78415] Avoid sending unrelated operations from transactions to recipient shard during chunk migration</title>
                <link>https://jira.mongodb.org/browse/SERVER-78415</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/293535c6e1dc7a07035b91f7e46a6ca60a4b62d9/src/mongo/db/s/migration_chunk_cloner_source.cpp#L210&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;LogTransactionOperationsForShardingHandler&lt;/a&gt; is the onCommit() handler registered for changes resulting from a multi&amp;#45;statement transaction to add those to the &amp;#95;transferMods buffer and eventually propagate them to the recipient shard. LogTransactionOperationsForShardingHandler will &lt;a href=&quot;https://github.com/mongodb/mongo/blob/293535c6e1dc7a07035b91f7e46a6ca60a4b62d9/src/mongo/db/s/migration_chunk_cloner_source.cpp#L257-L260&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;filter out changes made to a different namespace&lt;/a&gt; but won&apos;t filter out changes made to documents outside of the range being migrated. (There are helper functions isShardKeyValueInRange() and isDocInRange() for doing this kind of filtering.) Instead, the recipient shard will receive these change notifications and ignore them when &lt;a href=&quot;https://github.com/mongodb/mongo/blob/293535c6e1dc7a07035b91f7e46a6ca60a4b62d9/src/mongo/db/s/migration_destination_manager.cpp#L1736-L1745&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;applying&lt;/a&gt; &lt;a href=&quot;https://github.com/mongodb/mongo/blob/293535c6e1dc7a07035b91f7e46a6ca60a4b62d9/src/mongo/db/s/migration_destination_manager.cpp#L1780-L1786&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;changes&lt;/a&gt;. This is wasteful because it means a sharded collection under high transactions activity will have slower chunk migrations due to the volume of data the &amp;#95;transferMods command returns.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2376241">SERVER-78415</key>
            <summary>Avoid sending unrelated operations from transactions to recipient shard during chunk migration</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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-cluster-scalability">Backlog - Cluster Scalability</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                            <label>cs-subteam1</label>
                            <label>sharding-nyc-subteam1</label>
                    </labels>
                <created>Fri, 23 Jun 2023 23:21:37 +0000</created>
                <updated>Tue, 12 Dec 2023 17:04:33 +0000</updated>
                                                                            <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2376240">SERVER-78414</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="743948">SERVER-40791</issuekey>
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