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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-8949] Is there any major issue with running a 1 shard production setup?</title>
                <link>https://jira.mongodb.org/browse/SERVER-8949</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi,  We are planning to use sharded replica-set in production and would like to know if there are any issue with just running a single shard? As our data grow, we will add the second.  It seems to run fine in our test environment.&lt;/p&gt;

&lt;p&gt;Your document specifically mentions to run 2 shards: &lt;a href=&quot;http://docs.mongodb.org/manual/core/sharded-clusters/#infrastructure-requirements-for-sharded-clusters&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/core/sharded-clusters/#infrastructure-requirements-for-sharded-clusters&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The reason why we&apos;re doing this so that we don&apos;t have to convert replicaset to a sharded setup later on as the coding requirement is different for findAndRemove/findAndModify (shard key requirement for these calls) and deal with the shard key aspect at a later time.&lt;/p&gt;</description>
                <environment></environment>
        <key id="68077">SERVER-8949</key>
            <summary>Is there any major issue with running a 1 shard production setup?</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="9">Done</resolution>
                                        <assignee username="bryan.reinero">Bryan Reinero</assignee>
                                    <reporter username="huy@overnear.com">Huy Nguyen</reporter>
                        <labels>
                    </labels>
                <created>Tue, 12 Mar 2013 02:32:50 +0000</created>
                <updated>Tue, 26 Mar 2013 19:47:07 +0000</updated>
                            <resolved>Tue, 26 Mar 2013 19:47:07 +0000</resolved>
                                    <version>2.2.3</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="287639" author="bryan.reinero@10gen.com" created="Tue, 12 Mar 2013 22:20:12 +0000"  >&lt;p&gt;Running your cluster as a single sharded system is certainly possible, but there&apos;s no effective advantage to doing so. Although you could run a single sharded cluster to get chunk splitting, that&apos;s only advantageous if you&apos;re preparing to add shards in near future. Chunk splitting marginally increases the number of operations on a system, which although not prohibitive is in this case unnecessary. There can be a slight hit in bulk insertions through mongos, but this can be mitigated by splitting bulk loads across several mongos&apos;s. Remember too that sharded clusters include instances of mongos and config servers, which in themselves are not hard to configure nor maintain, but do require proper fail-over and backup considerations.&lt;/p&gt;</comment>
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