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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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>[SERVER-72111] Avoid additional read from DurableCatalog in CollectionImpl::initFromExisting</title>
                <link>https://jira.mongodb.org/browse/SERVER-72111</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When initializing a collection object, we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/8bcfe56e1df96e4070194804a5618a8edc537a57/src/mongo/db/catalog/collection_impl.cpp#L418&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;sometimes need to get the index ident from the durable catalog&lt;/a&gt;. &lt;/p&gt;

&lt;p&gt;However, this read from the durable catalog is redundant, since we&apos;ve &lt;a href=&quot;https://github.com/mongodb/mongo/blob/8bcfe56e1df96e4070194804a5618a8edc537a57/src/mongo/db/catalog/collection_catalog.cpp#L902&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;already read the catalog entry from the durable catalog&lt;/a&gt; before &lt;a href=&quot;https://github.com/mongodb/mongo/blob/8bcfe56e1df96e4070194804a5618a8edc537a57/src/mongo/db/catalog/collection_catalog.cpp#L933&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;calling this function&lt;/a&gt;. &lt;/p&gt;

&lt;p&gt;We should find a way to remove the additional read from the durable catalog during CollectionImpl::initFromExisting by passing the necessary information from the durable catalog through the call site. &lt;/p&gt;

&lt;p&gt;The current &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/storage/bson_collection_catalog_entry.h&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;BSONCollectionCatalogEntry object&lt;/a&gt;, however does not contain any information about index idents, so we may need to add a way to obtain both the catalog entry and the idxIdent field with one DurableCatalog function call.&lt;/p&gt;

&lt;p&gt;See the catalog arch guide for an &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/catalog/README.md#durable-catalog&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;example of the durable catalog format&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2210623">SERVER-72111</key>
            <summary>Avoid additional read from DurableCatalog in CollectionImpl::initFromExisting</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="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="13201">Fixed</resolution>
                                        <assignee username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</assignee>
                                    <reporter username="matthew.saltz@mongodb.com">Matthew Saltz</reporter>
                        <labels>
                    </labels>
                <created>Wed, 14 Dec 2022 16:14:01 +0000</created>
                <updated>Sun, 29 Oct 2023 21:29:16 +0000</updated>
                            <resolved>Fri, 3 Feb 2023 14:25:53 +0000</resolved>
                                                    <fixVersion>6.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5164823" author="xgen-internal-githook" created="Fri, 3 Feb 2023 05:10:13 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-72111&quot; title=&quot;Avoid additional read from DurableCatalog in CollectionImpl::initFromExisting&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-72111&quot;&gt;&lt;del&gt;SERVER-72111&lt;/del&gt;&lt;/a&gt; Avoid additional read from DurableCatalog in CollectionImpl::initFromExisting&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ff06d8d8c15e6b4f79231a385539741bb169dac1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ff06d8d8c15e6b4f79231a385539741bb169dac1&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5164822" author="xgen-internal-githook" created="Fri, 3 Feb 2023 05:10:12 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-72111&quot; title=&quot;Avoid additional read from DurableCatalog in CollectionImpl::initFromExisting&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-72111&quot;&gt;&lt;del&gt;SERVER-72111&lt;/del&gt;&lt;/a&gt; Add index idents to DurableCatalogEntry&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b2985ae30e7f4ff6a80690ef9d70d8215b353892&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b2985ae30e7f4ff6a80690ef9d70d8215b353892&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5140852" author="henrik.edin" created="Wed, 25 Jan 2023 19:45:15 +0000"  >&lt;p&gt;I think this ticket should include using &lt;tt&gt;ident&lt;/tt&gt; when instantiating the index catalog over just doing everything via &lt;tt&gt;indexName&lt;/tt&gt;.&lt;/p&gt;</comment>
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