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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-24853] Refactor Balancer code to use MigrationManager in order to move chunks in parallel</title>
                <link>https://jira.mongodb.org/browse/SERVER-24853</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When the MigrationManager is complete and fully tested. Manual moveChunk code path should already be implemented, or implemented in this ticket. The balancer will need to handle all of the migration Status results from MigrationManager::scheduleMigrations correctly &amp;#8211; like logging the errors, and splitting chunks that returned ChunkTooBig error.&lt;/p&gt;</description>
                <environment></environment>
        <key id="297836">SERVER-24853</key>
            <summary>Refactor Balancer code to use MigrationManager in order to move chunks in parallel</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Thu, 30 Jun 2016 18:50:44 +0000</created>
                <updated>Thu, 21 Sep 2017 19:28:59 +0000</updated>
                            <resolved>Tue, 19 Jul 2016 22:06:02 +0000</resolved>
                                                    <fixVersion>3.3.11</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1329068" author="xgen-internal-githook" created="Tue, 19 Jul 2016 22:04:06 +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-24853&quot; title=&quot;Refactor Balancer code to use MigrationManager in order to move chunks in parallel&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24853&quot;&gt;&lt;del&gt;SERVER-24853&lt;/del&gt;&lt;/a&gt; Support parallel chunk migrations&lt;/p&gt;

&lt;p&gt;This change connects the new policy, which supports returning multiple&lt;br/&gt;
migrations for the same collection with the MigrationManager in order to&lt;br/&gt;
allow chunks to migrate in parallel.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/971026616e9c96398a1e9c8af7107dfd48ff84e8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/971026616e9c96398a1e9c8af7107dfd48ff84e8&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
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                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="25337">SERVER-4355</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10020">
                    <name>Gantt Dependency</name>
                                            <outwardlinks description="has to be done before">
                                        <issuelink>
            <issuekey id="297837">SERVER-24854</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="300147">SERVER-24995</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="300151">SERVER-24996</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="has to be done after">
                                        <issuelink>
            <issuekey id="297965">SERVER-24865</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="240675">SERVER-21626</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="297814">SERVER-24852</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="297968">SERVER-24866</issuekey>
        </issuelink>
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