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    <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>[COMPASS-6729] Investigate changes in PM-3318: More Astute Balancer M1: Enable Faster Add and Remove Shard</title>
                <link>https://jira.mongodb.org/browse/COMPASS-6729</link>
                <project id="13182" key="COMPASS">Compass </project>
                    <description>    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Original Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #c2d2c2;&quot;&gt;
&lt;p&gt;    Planning on making changes to the balancer so additional documentation will be needed&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
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&lt;h4&gt;&lt;a name=&quot;Summary&quot;&gt;&lt;/a&gt;Summary&lt;/h4&gt;
&lt;p&gt;The balancer will be updated so that customers can utilize the faster add and remove shard machinery that Replication is building in PM-2322&lt;/p&gt;

&lt;h4&gt;&lt;a name=&quot;Motivation&quot;&gt;&lt;/a&gt;Motivation&lt;/h4&gt;
&lt;p&gt;The current data migration when adding or removing a shard, chunk migration, is too slow. Customers are greatly disappointed with the current migration speeds they experience today. With an updated balancer that can leverage the faster data migration machinery customers will be able to move 1TB of data to/from a shard in a day or less which now takes nearly a month (without concurrency).&lt;/p&gt;

&lt;h4&gt;&lt;a name=&quot;Documentation&quot;&gt;&lt;/a&gt;Documentation&lt;/h4&gt;
&lt;p&gt;Product Description&lt;br/&gt;
&lt;a href=&quot;https://docs.google.com/document/d/1SFOxJaSRyYlrbQrlQWA4VTGukEV2IzdtnIkkOfSyq5g/edit?usp=drivesdk&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Scope&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://docs.google.com/document/d/1faJxQZtIa4lCKGLK5S9qJSDwR9-aR_tqDyihIN1amYg/edit?usp=drivesdk&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Technical Design&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://docs.google.com/document/d/1zV3z8KB43t3A_lKYkf6wulAB15fI_PspeTzzfWkEmw0/edit?usp=drivesdk&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Docs Update&lt;/a&gt;&lt;/p&gt;
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                <environment></environment>
        <key id="2317258">COMPASS-6729</key>
            <summary>Investigate changes in PM-3318: More Astute Balancer M1: Enable Faster Add and Remove Shard</summary>
                <type id="10501" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Investigation</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="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Tue, 18 Apr 2023 12:55:26 +0000</created>
                <updated>Thu, 1 Jun 2023 09:38:14 +0000</updated>
                            <resolved>Thu, 1 Jun 2023 09:38:14 +0000</resolved>
                                                    <fixVersion>No version</fixVersion>
                                        <due></due>
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