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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>[DOCS-1189] update/correct documentation for _secondaryThrottle</title>
                <link>https://jira.mongodb.org/browse/DOCS-1189</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;In all three places where _secondaryThrottle is mentioned &lt;br/&gt;
&lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/manage-chunks-in-sharded-cluster/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/tutorial/manage-chunks-in-sharded-cluster/&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/configure-sharded-cluster-balancer/#require-replication-before-chunk-migration-secondary-throttle&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/tutorial/configure-sharded-cluster-balancer/#require-replication-before-chunk-migration-secondary-throttle&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;http://docs.mongodb.org/manual/reference/command/moveChunk/#movechunk&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/reference/command/moveChunk/#movechunk&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;the following is unclear or needs to be fixed (for 2.4):&lt;/p&gt;

&lt;p&gt;In 2.4 the default setting of _secondaryThrottle is &apos;true&apos; (was false before).&lt;/p&gt;

&lt;p&gt;When it&apos;s set to true, the following is what those three pages say:&lt;/p&gt;

&lt;p&gt;&quot;When set to true, MongoDB ensures replication to secondaries before allowing new chunk migrations.&quot;&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;this is misleading - MongoDB always ensures replication to majority before even entering critical section of migration of each chunk.  This option will slow down copying and deleting by ensuring replication (to one secondary) of every single document during copy/delete.  The key is this option add continuous checking of replication instead of &quot;one time&quot; basically.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;&quot;When enabled, secondary throttle puts a &lt;/p&gt;
{ w : 2 }
&lt;p&gt; write concern on deletes and on copies, which means the balancer waits for those operations to replicate to at least one secondary before migrating chunks.When enabled, secondary throttle puts a &lt;/p&gt;
{ w : 2 }
&lt;p&gt; write concern on deletes and on copies, which means the balancer waits for those operations to replicate to at least one secondary before migrating chunks.&quot;&lt;/p&gt;

&lt;p&gt;This is exactly correct, except for the last clause - should be &quot;before continuing with the next document&quot; - this is happening in the midst of chunk migration.&lt;/p&gt;

&lt;p&gt;&quot;_secondaryThrottle (boolean) &#8211; Optional. Set to false by default. If set to true, the balancer waits for replication to secondaries while copying and deleting data during migrations.&quot;&lt;/p&gt;

&lt;p&gt;This is 100% correct (for 2.2) I just want to make sure it got changed to &quot;Set to true by default&quot; (for 2.4).&lt;/p&gt;</description>
                <environment></environment>
        <key id="67131">DOCS-1189</key>
            <summary>update/correct documentation for _secondaryThrottle</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="9">Done</resolution>
                                        <assignee username="sam.kleinman">Sam Kleinman</assignee>
                                    <reporter username="asya.kamsky@mongodb.com">Asya Kamsky</reporter>
                        <labels>
                    </labels>
                <created>Sun, 3 Mar 2013 20:00:34 +0000</created>
                <updated>Mon, 30 Oct 2023 21:56:30 +0000</updated>
                            <resolved>Tue, 5 Mar 2013 00:36:07 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="281391" author="auto" created="Tue, 5 Mar 2013 00:36:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-03-04T18:17:03Z&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-1189&quot; title=&quot;update/correct documentation for _secondaryThrottle&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-1189&quot;&gt;&lt;del&gt;DOCS-1189&lt;/del&gt;&lt;/a&gt;: change to secondaryThrottle for 2.4&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/2a0609ebce596cfcf7e986e24092f2bfbdcfbdeb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/2a0609ebce596cfcf7e986e24092f2bfbdcfbdeb&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="281170" author="auto" created="Mon, 4 Mar 2013 20:31:39 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-03-04T18:05:40Z&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-1189&quot; title=&quot;update/correct documentation for _secondaryThrottle&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-1189&quot;&gt;&lt;del&gt;DOCS-1189&lt;/del&gt;&lt;/a&gt;: minor change to secondaryThrotle note to correct language relevant to 2.2&lt;br/&gt;
Branch: v2.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/61c3819d5fe82054666b9067ee955467c0144cbf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/61c3819d5fe82054666b9067ee955467c0144cbf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="281169" author="auto" created="Mon, 4 Mar 2013 20:31:39 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-03-04T18:05:40Z&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-1189&quot; title=&quot;update/correct documentation for _secondaryThrottle&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-1189&quot;&gt;&lt;del&gt;DOCS-1189&lt;/del&gt;&lt;/a&gt;: minor change to secondaryThrotle note to correct language relevant to 2.2&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/d307b3ffc6d03da66d7e706af60d69d29110d2bd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/d307b3ffc6d03da66d7e706af60d69d29110d2bd&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="168459">DOCS-4341</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="57695">SERVER-7779</issuekey>
        </issuelink>
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