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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-23733] Remove the mongos chunkSize configuration option</title>
                <link>https://jira.mongodb.org/browse/SERVER-23733</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, &lt;tt&gt;mongos&lt;/tt&gt; instances can be configured with a &lt;a href=&quot;https://docs.mongodb.org/v3.0/reference/configuration-options/#sharding.chunkSize&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;chunkSize&lt;/tt&gt;&lt;/a&gt; and &lt;a href=&quot;https://docs.mongodb.org/v3.0/reference/configuration-options/#sharding.autoSplit&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;autoSplit&lt;/tt&gt;&lt;/a&gt; settings. The first indicates the maximum chunk size after which chunks will be considered jumbo and won&apos;t be moved until split and the second indicates whether inserts should automatically split chunks.&lt;/p&gt;

&lt;p&gt;Since the balancer now will reside on the config server, there is no point in porting these options to &lt;tt&gt;mongod&lt;/tt&gt; as well and instead they should be driven entirely from the values in config.settings.&lt;/p&gt;</description>
                <environment></environment>
        <key id="279830">SERVER-23733</key>
            <summary>Remove the mongos chunkSize configuration option</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="9">Done</resolution>
                                        <assignee username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Thu, 14 Apr 2016 20:12:53 +0000</created>
                <updated>Tue, 14 Mar 2017 18:11:31 +0000</updated>
                            <resolved>Thu, 2 Jun 2016 13:26:34 +0000</resolved>
                                                    <fixVersion>3.3.8</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1282268" author="xgen-internal-githook" created="Thu, 2 Jun 2016 13:24:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23733&quot; title=&quot;Remove the mongos chunkSize configuration option&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23733&quot;&gt;&lt;del&gt;SERVER-23733&lt;/del&gt;&lt;/a&gt; Remove the mongos chunkSize startup option&lt;/p&gt;

&lt;p&gt;This change removes the chunkSize startup option from mongos in place of&lt;br/&gt;
the &apos;chunksize&apos; setting.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d900c3b855e66a337ebe6c6f46ab5656d79e1db9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d900c3b855e66a337ebe6c6f46ab5656d79e1db9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1255356" author="xgen-internal-githook" created="Wed, 4 May 2016 20:09:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23733&quot; title=&quot;Remove the mongos chunkSize configuration option&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23733&quot;&gt;&lt;del&gt;SERVER-23733&lt;/del&gt;&lt;/a&gt; Tests should not write chunkSize to config.settings directly&lt;/p&gt;

&lt;p&gt;Instead, they should pass it as parameter to ShardingTest.&lt;/p&gt;

&lt;p&gt;This change is in preparation for removing the chunkSize parameter to&lt;br/&gt;
mongos.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/29ff4c8033c8c22cf212e13bd27be05649c03f3e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/29ff4c8033c8c22cf212e13bd27be05649c03f3e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1236968" author="kaloian.manassiev" created="Fri, 15 Apr 2016 11:59:33 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=renctan&quot; class=&quot;user-hover&quot; rel=&quot;renctan&quot;&gt;renctan&lt;/a&gt;, this is correct. However using startup options introduces the possibility of starting different mongos instances with different configurations and opens opportunity for mistake. My thinking is that such balancer behaviour is best controlled from a single source for the entire cluster (or per collection).&lt;/p&gt;

&lt;p&gt;Also with the plans to eventually move autosplit to the shards, this option will have to go away regardless.&lt;/p&gt;</comment>
                            <comment id="1236403" author="renctan" created="Thu, 14 Apr 2016 20:54:45 +0000"  >&lt;p&gt;autosplit is not handled by the balancer so shouldn&apos;t it be unaffected by this (until we move it to the shards)?&lt;/p&gt;</comment>
                    </comments>
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                                        <issuelink>
            <issuekey id="281034">SERVER-23822</issuekey>
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