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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-50970] Support secondary reads in ephemeralForTest</title>
                <link>https://jira.mongodb.org/browse/SERVER-50970</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;ephemeralForTest needs to implement the kLastApplied ReadSource to support secondary reads.&lt;/p&gt;

&lt;p&gt;This will most likely require creating a SnapshotManager that &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5a1953c4ae4416a60c45c5c90a210bd84b352032/src/mongo/db/storage/wiredtiger/wiredtiger_snapshot_manager.cpp#L51-L62&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;records updates to lastApplied&lt;/a&gt; from the replication code, similar to the approach in WiredTigerRecoveryUnit.&lt;/p&gt;

&lt;p&gt;Additionally, create a StorageEngine helper to replace &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5a1953c4ae4416a60c45c5c90a210bd84b352032/src/mongo/db/db_raii.cpp#L101&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this use of supportsReadConcernSnapshot&lt;/a&gt; in AGCFR. Something like &quot;supportsSecondaryReads&quot; or &quot;supportsReadSourceLastApplied&quot;.&lt;/p&gt;

&lt;p&gt;Another option would be to rewrite this SnapshotManager code to be above the storage engine so that any storage engine that supports timestamp reads can automatically support lastApplied reads (any maybe majority?)&lt;/p&gt;</description>
                <environment></environment>
        <key id="1477020">SERVER-50970</key>
            <summary>Support secondary reads in ephemeralForTest</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="louis.williams@mongodb.com">Louis Williams</reporter>
                        <labels>
                            <label>neweng</label>
                            <label>newgrad</label>
                    </labels>
                <created>Wed, 16 Sep 2020 14:13:54 +0000</created>
                <updated>Tue, 6 Dec 2022 02:09:00 +0000</updated>
                            <resolved>Wed, 6 Apr 2022 13:53:35 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
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            <issuekey id="641193">SERVER-38341</issuekey>
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            <issuekey id="1416477">SERVER-49792</issuekey>
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