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    <title>MongoDB Jira</title>
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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-6759] Investigate changes in PM-3319: More Astute Balancer M2: Global Balancing By Data Size</title>
                <link>https://jira.mongodb.org/browse/COMPASS-6759</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 have a new policy that will distribute all collections equally across the shards in a cluster by data size.&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Motivation&quot;&gt;&lt;/a&gt;Motivation&lt;/h4&gt;

&lt;p&gt;Today only sharded collections are balanced across shards which can lead to a poor distribution of the data across the shards which leads to less than optimal resource utilization at a cluster level. Customers desire their workload to be as evenly distributed across the shards in their cluster as possible. To better distribute the workload across the cluster the balancer will take into account the size of both sharded and unsharded collection and will be able distribute unsharded and sharded collections as needed to achieve the goal of equal distribution of data across all shards.&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/1IU_HMgf-5IbjX88s6oyF2x5C8edwtch_dWKhqvHjzJQ/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/1vlcs8KbmFNeNthDhBISTbZ0aMViNYTvQgQGVCRjFooY/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/1FvHU3-bg9MycSmrc7tKlXCgtUVLlHrLJZP6gfZ8Rud4/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="2321491">COMPASS-6759</key>
            <summary>Investigate changes in PM-3319: More Astute Balancer M2: Global Balancing By Data Size</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>Fri, 21 Apr 2023 21:04:11 +0000</created>
                <updated>Fri, 26 May 2023 11:58:43 +0000</updated>
                            <resolved>Wed, 3 May 2023 14:17:20 +0000</resolved>
                                                    <fixVersion>No version</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5454645" author="dbeng-pm-bot" created="Fri, 26 May 2023 11:58:43 +0000"  >&lt;p&gt;&lt;em&gt;Fix Version updated for upstream PM-3319:&lt;/em&gt; &lt;/p&gt;</comment>
                            <comment id="5397440" author="rhys.howell" created="Wed, 3 May 2023 14:17:20 +0000"  >&lt;p&gt;No devtools impact&lt;/p&gt;</comment>
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