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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-20511] Stopping balancer and Stopping all meta-data change</title>
                <link>https://jira.mongodb.org/browse/SERVER-20511</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I have seen that &quot;Stopping balancer to prevent all meta-data change of config server&quot; from a few mongodb documents.&lt;/p&gt;

&lt;p&gt;For example,&lt;br/&gt;
&lt;a href=&quot;http://docs.mongodb.org/master/release-notes/2.4-upgrade/#&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/master/release-notes/2.4-upgrade/#&lt;/a&gt;&lt;br/&gt;
Turn off the balancer in the sharded cluster and stop all meta-data operations. If you are in the middle of an upgrade process (Upgrade a Sharded Cluster from MongoDB 2.2 to MongoDB 2.4), you have already disabled the balancer.&lt;/p&gt;

&lt;p&gt;So I have thought, If I stop balancer all config server&apos;s access(query/insert/update/delete) is stopped automatically. Config server&apos;s data is never changed during balancer stop.&lt;/p&gt;

&lt;p&gt;But, I found that auto chunk split is active even balancer is stopped recently.&lt;br/&gt;
I think chunk split is also important meta data change like chunk migration.&lt;/p&gt;

&lt;p&gt;Here&apos;s question.&lt;br/&gt;
Why MongoDB has only balancer stop not auto split. ?&lt;br/&gt;
Meta data change of auto splitting chunk is not harm meta-data upgrade(Upgrading mongodb) ?&lt;br/&gt;
Does chunk migration has any special things rather than chunk split ?&lt;/p&gt;</description>
                <environment></environment>
        <key id="230562">SERVER-20511</key>
            <summary>Stopping balancer and Stopping all meta-data change</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="-1">Unassigned</assignee>
                                    <reporter username="sunguck.lee@gmail.com">&#50500;&#45208; &#54616;&#47532;</reporter>
                        <labels>
                    </labels>
                <created>Sat, 19 Sep 2015 00:15:29 +0000</created>
                <updated>Wed, 8 Feb 2023 15:40:57 +0000</updated>
                            <resolved>Thu, 24 Sep 2015 03:06:31 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1041662" author="sunguck.lee@gmail.com" created="Thu, 24 Sep 2015 05:07:44 +0000"  >&lt;p&gt;Hi Stephen.&lt;br/&gt;
I will post subsequent question on mongodb-users group.&lt;br/&gt;
Thanks for the explain.&lt;/p&gt;</comment>
                            <comment id="1041579" author="stennie" created="Thu, 24 Sep 2015 03:06:31 +0000"  >&lt;p&gt;Hi Matt,&lt;/p&gt;

&lt;p&gt;The --upgrade step needs all config servers online in order to upgrade the cluster metadata. The intended advisory is that you should not attempt any &lt;a href=&quot;http://docs.mongodb.org/master/release-notes/2.4-upgrade/#considerations&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;administrative updates&lt;/a&gt; (adding shards, sharding collections, ...) while the upgrade process runs.&lt;/p&gt;

&lt;p&gt;If you follow the instructions as outlined in the MongoDB manual there should be no issues with the upgrade.&lt;/p&gt;

&lt;p&gt;Please also note that the SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion, please post on the mongodb-users group (&lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://groups.google.com/group/mongodb-user&lt;/a&gt;) or Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Stephen&lt;/p&gt;</comment>
                            <comment id="1041435" author="sunguck.lee@gmail.com" created="Wed, 23 Sep 2015 22:29:30 +0000"  >&lt;p&gt;Anyone tell me about this question ?&lt;/p&gt;</comment>
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