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    <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-56470] Evaluate the `consolidate_ns_chunks.js` script</title>
                <link>https://jira.mongodb.org/browse/SERVER-56470</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This task is to come up with a model for what a consolidation/defragmentation algorithm for a sharded cluster would look like and to evaluate whether the existing &lt;a href=&quot;https://github.com/vmenajr/mongo/blob/77cfdb1dfc658c592430d86b1359c6c45e031cf9/sharding_utils.js#L393&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;consolidate_ns_chunks.js&lt;/tt&gt;&lt;/a&gt; script fulfills that model.&lt;/p&gt;

&lt;p&gt;As part of this ticket we should evaluate whether we could perform most of the merges prior to moving data around so that the effect of refreshes for clusters with large number of chunks can be kept to a minimum.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1695964">SERVER-56470</key>
            <summary>Evaluate the `consolidate_ns_chunks.js` script</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-sharding-emea">[DO NOT USE] Backlog - Sharding EMEA</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Thu, 29 Apr 2021 13:44:10 +0000</created>
                <updated>Tue, 6 Dec 2022 01:21:52 +0000</updated>
                            <resolved>Sun, 9 May 2021 11:28:57 +0000</resolved>
                                                                                        <votes>0</votes>
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                                                                                                                <comments>
                            <comment id="3762739" author="kaloian.manassiev" created="Sun, 9 May 2021 11:28:57 +0000"  >&lt;p&gt;We won&apos;t be using the JS variant of the script in lieu of a &lt;a href=&quot;https://github.com/kaloianm/workscripts/blob/master/ctools/defragment_sharded_collection.py&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Python-based one&lt;/a&gt;, which adds concurrency and operates closer to the way the Balancer does.&lt;/p&gt;</comment>
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