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    <title>MongoDB Jira</title>
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    <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>[DOCS-15625] Clarify that shards should be deployed as replica sets in 3.6 onward</title>
                <link>https://jira.mongodb.org/browse/DOCS-15625</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;On &lt;a href=&quot;https://www.mongodb.com/docs/v4.4/core/sharded-cluster-components/#sharded-cluster-components&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.mongodb.com/docs/v4.4/core/sharded-cluster-components/#sharded-cluster-components&lt;/a&gt; we see (correctly) that:&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;A MongoDB&#160;&lt;a href=&quot;https://www.mongodb.com/docs/v4.4/reference/glossary/#std-term-sharded-cluster&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;sharded cluster&lt;/a&gt;&#160;consists of the following components:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://www.mongodb.com/docs/v4.4/core/sharded-cluster-shards/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;shard&lt;/a&gt;: Each shard contains a subset of the sharded data. As of MongoDB 3.6, shards &lt;b&gt;must&lt;/b&gt; be deployed as a&#160;&lt;a href=&quot;https://www.mongodb.com/docs/v4.4/reference/glossary/#std-term-replica-set&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;replica set&lt;/a&gt;.&lt;/li&gt;
&lt;/ul&gt;
&lt;/blockquote&gt;
&lt;p&gt;However on &lt;a href=&quot;https://www.mongodb.com/docs/v4.4/sharding/#sharded-cluster&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.mongodb.com/docs/v4.4/sharding/#sharded-cluster&lt;/a&gt; we see:&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;A MongoDB&#160;&lt;a href=&quot;https://www.mongodb.com/docs/v4.4/reference/glossary/#std-term-sharded-cluster&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;sharded cluster&lt;/a&gt;&#160;consists of the following components:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://www.mongodb.com/docs/v4.4/core/sharded-cluster-shards/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;shard&lt;/a&gt;: Each shard contains a subset of the sharded data. Each shard &lt;b&gt;can&lt;/b&gt; be deployed as a&#160;&lt;a href=&quot;https://www.mongodb.com/docs/v4.4/reference/glossary/#std-term-replica-set&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;replica set&lt;/a&gt;.&lt;/li&gt;
&lt;/ul&gt;
&lt;/blockquote&gt;
&lt;p&gt;An issue came up in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-69517&quot; title=&quot;moveChunk command fails with &amp;quot;Transaction numbers are only allowed on a replica set member or mongos&amp;quot; on Mongo 4.4 mongos without replica sets&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-69517&quot;&gt;&lt;del&gt;SERVER-69517&lt;/del&gt;&lt;/a&gt; where a user brought up this inconsistency and how it can cause confusion. I&apos;m not sure if there are other locations that should be updated, but we should have this note anywhere that setting up shards is mentioned:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;As of MongoDB 3.6, shards &lt;b&gt;must&lt;/b&gt; be deployed as a&#160;&lt;a href=&quot;https://www.mongodb.com/docs/v4.4/reference/glossary/#std-term-replica-set&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;replica set&lt;/a&gt;.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2134587">DOCS-15625</key>
            <summary>Clarify that shards should be deployed as replica sets in 3.6 onward</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="-1">Unassigned</assignee>
                                    <reporter username="chris.kelly@mongodb.com">Chris Kelly</reporter>
                        <labels>
                            <label>backlog</label>
                            <label>feature</label>
                            <label>replication</label>
                            <label>sharding</label>
                    </labels>
                <created>Mon, 12 Sep 2022 22:49:38 +0000</created>
                <updated>Mon, 22 Jan 2024 15:58:54 +0000</updated>
                                            <version>4.4.0</version>
                    <version>5.0.0</version>
                    <version>6.0.0</version>
                    <version>6.1.0-rc0</version>
                                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
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