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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-84090] Investigate whether to change or deprecate router&apos;s `splitVector` command</title>
                <link>https://jira.mongodb.org/browse/SERVER-84090</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/553d8fec277d4cc5df361630f1849d059fd251eb/src/mongo/s/commands/cluster_split_vector_cmd.cpp#L68&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Router&apos;s splitVector command&lt;/a&gt; is only working &lt;a href=&quot;https://github.com/mongodb/mongo/blob/2ce7d457434f2b81924c32ead1fefce7d9e3a949/src/mongo/s/commands/cluster_split_vector_cmd.cpp#L109-L111&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;for unsharded collections&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/2ce7d457434f2b81924c32ead1fefce7d9e3a949/src/mongo/s/commands/cluster_split_vector_cmd.cpp#L120-L121&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;targets the db primary&lt;/a&gt; assuming that the unsharded collections can only be hosted on it.&lt;/p&gt;

&lt;p&gt;This ticket is to decide what to do with such command considering that:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;The assumption that only the primary shard is hosting unsharded collections will soon not hold anymore (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-80136&quot; title=&quot;Create a new command to change the DBPrimary without moving any collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-80136&quot;&gt;&lt;del&gt;SERVER-80136&lt;/del&gt;&lt;/a&gt;).&lt;/li&gt;
	&lt;li&gt;The &lt;tt&gt;splitVector&lt;/tt&gt; implementation has always been flawed (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-55028&quot; title=&quot;Improve the auto-splitter policy&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-55028&quot;&gt;&lt;del&gt;SERVER-55028&lt;/del&gt;&lt;/a&gt;) and all internal usages have been replaced with &lt;tt&gt;autoSplitVector&lt;/tt&gt; that only exposes &lt;a href=&quot;https://github.com/mongodb/mongo/blob/2ce7d457434f2b81924c32ead1fefce7d9e3a949/src/mongo/db/s/auto_split_vector_command.cpp#L64&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;a shard command&lt;/a&gt;.&lt;/li&gt;
&lt;/ul&gt;
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                <environment></environment>
        <key id="2522590">SERVER-84090</key>
            <summary>Investigate whether to change or deprecate router&apos;s `splitVector` command</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-catalog-and-routing">Backlog - Catalog and Routing</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                    </labels>
                <created>Tue, 12 Dec 2023 13:37:01 +0000</created>
                <updated>Fri, 2 Feb 2024 19:36:17 +0000</updated>
                            <resolved>Fri, 2 Feb 2024 13:12:24 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>3</watches>
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                    <name>Duplicate</name>
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            <issuekey id="2535034">SERVER-84469</issuekey>
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                            <issuelinktype id="10012">
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            <issuekey id="2565732">SERVER-86171</issuekey>
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