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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-64404] improve sharding support $listCatalog aggregation stage</title>
                <link>https://jira.mongodb.org/browse/SERVER-64404</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We introduced the $listCatalog aggregation stage in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-62006&quot; title=&quot;Support majority read for _mdb_catalog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-62006&quot;&gt;&lt;del&gt;SERVER-62006&lt;/del&gt;&lt;/a&gt; to provide read majority access to the durable catalog to support an internal application for migrating sharded clusters.&lt;/p&gt;

&lt;p&gt;There are still some gaps in this new aggregation stage that need to be addressed in the context of a sharded cluster, especially when there is active chunk migration in progress:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Ensuring the aggregation stage is defined to run on all shards.&lt;/li&gt;
	&lt;li&gt;Provide identifying shard information in the stage results.&lt;/li&gt;
	&lt;li&gt;Take into account sharding-specific information in collections such as &lt;tt&gt;config.databases&lt;/tt&gt; and &lt;tt&gt;config.collections&lt;/tt&gt;.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;The initial work included tests that run in jsCore and most of the associated passthroughs. A new test in the &lt;tt&gt;jstests/sharding&lt;/tt&gt; suite would help with coverage over the sharding-specific enhancements.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1998470">SERVER-64404</key>
            <summary>improve sharding support $listCatalog aggregation stage</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="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="13201">Fixed</resolution>
                                        <assignee username="gregory.noma@mongodb.com">Gregory Noma</assignee>
                                    <reporter username="benety.goh@mongodb.com">Benety Goh</reporter>
                        <labels>
                    </labels>
                <created>Thu, 10 Mar 2022 12:24:54 +0000</created>
                <updated>Sun, 29 Oct 2023 21:41:16 +0000</updated>
                            <resolved>Tue, 29 Mar 2022 17:40:26 +0000</resolved>
                                                    <fixVersion>6.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="4442498" author="xgen-internal-githook" created="Tue, 29 Mar 2022 17:01:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;, &apos;username&apos;: &apos;gregorynoma&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-64404&quot; title=&quot;improve sharding support $listCatalog aggregation stage&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-64404&quot;&gt;&lt;del&gt;SERVER-64404&lt;/del&gt;&lt;/a&gt; Add collection-level `$listCatalog`&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5157deaa6adcce380f01f4736efbdf3c473e11bf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5157deaa6adcce380f01f4736efbdf3c473e11bf&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="2137947">SERVER-69750</issuekey>
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            <issuekey id="1947754">SERVER-62006</issuekey>
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            <issuekey id="1947757">SERVER-62008</issuekey>
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            <issuelink>
            <issuekey id="2010092">SERVER-64980</issuekey>
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