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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-42629] Duplicate &apos;ns&apos; field in the DurableCatalog</title>
                <link>https://jira.mongodb.org/browse/SERVER-42629</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;While working on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-41746&quot; title=&quot;Test varying lengths of collection names&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-41746&quot;&gt;&lt;del&gt;SERVER-41746&lt;/del&gt;&lt;/a&gt; I noticed that it was impossible to insert collection names with a length of &amp;gt;= ~8MB. When a new entry is added into the DurableCatalog, we append the &apos;ns&apos; field twice &lt;a href=&quot;https://github.com/mongodb/mongo/blob/0d8de0a489533877bbedc22e1480156f50401b13/src/mongo/db/storage/durable_catalog_impl.cpp#L495-L506&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;.&lt;/p&gt;


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&lt;p/&gt;


&lt;p&gt;With a collection name that is &amp;lt;= ~8MB, that quickly brings us up to our 16MB BSON document limit.&lt;br/&gt;
Removing one of these fields would lower the cost of having to maintain both the fields whenever a namespace change occurred and allows the insertion of even longer collection names.&lt;/p&gt;</description>
                <environment></environment>
        <key id="883881">SERVER-42629</key>
            <summary>Duplicate &apos;ns&apos; field in the DurableCatalog</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</reporter>
                        <labels>
                    </labels>
                <created>Mon, 5 Aug 2019 15:42:16 +0000</created>
                <updated>Tue, 6 Dec 2022 02:51:37 +0000</updated>
                                                                            <component>Catalog</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2359773" author="gregory.wlodarek" created="Tue, 6 Aug 2019 16:12:23 +0000"  >&lt;p&gt;After discussing with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=geert.bosch&quot; class=&quot;user-hover&quot; rel=&quot;geert.bosch&quot;&gt;geert.bosch&lt;/a&gt;, the &lt;tt&gt;md.ns&lt;/tt&gt; field should be the easier of the two to remove. We&apos;ll need to keep backward compatibility in mind when removing the field as prior server versions depend on both fields. Doing some work for 4.2.1+ we could make it so that it uses the top-level &lt;tt&gt;ns&lt;/tt&gt; field only and ignores the &lt;tt&gt;md.ns&lt;/tt&gt; field. We would still have to update both fields upon any updates though. This would allow us to remove the &lt;tt&gt;md.ns&lt;/tt&gt; field entirely for 4.4.&lt;/p&gt;</comment>
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            <issuekey id="800604">SERVER-41696</issuekey>
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