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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-32510] Mongos executes the write commands targeting logic twice per request</title>
                <link>https://jira.mongodb.org/browse/SERVER-32510</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;For every batch write request executed, mongos once &lt;a href=&quot;https://github.com/mongodb/mongo/blob/af1bfd9f4d47672e541c5c60e68c68e436a79fbf/src/mongo/s/commands/cluster_write.cpp#L208&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;targets&lt;/a&gt; the entire collection and then performs the regular shard key based logic. Note that this is just the targeting logic, it&apos;s not executing the actual request. This seems to only be done in order to find out if any of the writes are going against the config server.&lt;/p&gt;

&lt;p&gt;Since executing the targeting logic is somewhat expensive, this can be avoided by setting the shard version to IGNORED in &lt;a href=&quot;https://github.com/mongodb/mongo/blob/af1bfd9f4d47672e541c5c60e68c68e436a79fbf/src/mongo/s/write_ops/write_op.cpp#L102&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;WriteOp::targetWrites&lt;/tt&gt;&lt;/a&gt; instead.&lt;/p&gt;</description>
                <environment></environment>
        <key id="477749">SERVER-32510</key>
            <summary>Mongos executes the write commands targeting logic twice per request</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                            <label>former-quick-wins</label>
                            <label>gm-ack</label>
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                <created>Tue, 2 Jan 2018 15:11:01 +0000</created>
                <updated>Tue, 6 Dec 2022 03:42:52 +0000</updated>
                            <resolved>Thu, 23 Jan 2020 14:20:15 +0000</resolved>
                                    <version>3.6.1</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
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