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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-62974] Investigate use of persistent maps in CollectionCatalog</title>
                <link>https://jira.mongodb.org/browse/SERVER-62974</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We create a copy of the CollectionCatalog when we need to modify it. This can be somewhat expensive when we have many collections. In some cases where we have a global exclusive lock, such as at startup, we can mitigate this by using batched writes. During steady state though, we can&apos;t use this batch processing. For some workloads, like creating many collections in sequence, this can have quadratic cost.&lt;/p&gt;

&lt;p&gt;We could potentially reduce the cost of the CollectionCatalog copy so that it isn&apos;t linear in the number of collections by using persistent data structures. We already have a persistent map-like structure in our codebase--the radix tree used for EphemeralForTest. This could be used to, at the very least, do a quick POC and see if the idea warrants further work.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1970743">SERVER-62974</key>
            <summary>Investigate use of persistent maps in CollectionCatalog</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="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="dan.larkin-york@mongodb.com">Dan Larkin-York</reporter>
                        <labels>
                    </labels>
                <created>Tue, 25 Jan 2022 20:22:13 +0000</created>
                <updated>Thu, 23 Mar 2023 17:52:46 +0000</updated>
                            <resolved>Thu, 23 Mar 2023 17:52:46 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4327909" author="louis.williams" created="Tue, 1 Feb 2022 16:37:49 +0000"  >&lt;p&gt;We should alternatively consider partitioning the catalog.&lt;/p&gt;</comment>
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