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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-74722] Investigate performance for initial bulk loading in sharding</title>
                <link>https://jira.mongodb.org/browse/SERVER-74722</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently in migration and resharding, we create the indexes first and then copy the documents. The indexes are then updated just like regular writes. Replication initial sync uses CollectionBulkLoaderImpl which defers index updates and then commits them manually with MultiIndexBlock at the end. This ticket is to investigate whether using the same strategy would net some performance improvements.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2284971">SERVER-74722</key>
            <summary>Investigate performance for initial bulk loading in sharding</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-sharding-nyc">[DO NOT USE] Backlog - Sharding NYC</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
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                <created>Thu, 9 Mar 2023 15:52:58 +0000</created>
                <updated>Tue, 30 May 2023 15:26:03 +0000</updated>
                            <resolved>Fri, 26 May 2023 20:30:35 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5456292" author="max.hirschhorn@10gen.com" created="Fri, 26 May 2023 20:30:35 +0000"  >&lt;p&gt;The PM-2322 project will be changing resharding to build the indexes after finishing the initial clone of data. We&apos;ll see performance improvements through there.&lt;/p&gt;

&lt;p&gt;We discussed this ticket in triage and it doesn&apos;t feel worthwhile to make any changes to chunk migration. This optimization would only help the first chunk for a sharded collection which migrates to a shard and WT cache effect benefits for 128MB are going to be significantly less.&lt;/p&gt;</comment>
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            <issuekey id="2306207">SERVER-75647</issuekey>
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