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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-47008] Make the storage API take requests for either checkpoints or journal flushes and move the waitUntilDurable logic above the storage API</title>
                <link>https://jira.mongodb.org/browse/SERVER-47008</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The WiredTigerSessionCache::waitUntilDurable is more complex than it should be and can be made simpler.&lt;/p&gt;

&lt;p&gt;Low down in the WiredTigerSessionCache::waitUntilDurable function, &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d302a91c30b2648a2262e4ce737e767a3db8597d/src/mongo/db/storage/wiredtiger/wiredtiger_session_cache.cpp#L244-L367&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;we decide whether to call wt::checkpoint or wt::log_flush &lt;/a&gt; based on &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d302a91c30b2648a2262e4ce737e767a3db8597d/src/mongo/db/storage/wiredtiger/wiredtiger_session_cache.cpp#L284&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;function parameters&lt;/a&gt; or &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d302a91c30b2648a2262e4ce737e767a3db8597d/src/mongo/db/storage/wiredtiger/wiredtiger_session_cache.cpp#L354&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;server durability settings&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Instead, we propose splitting the WiredTigerSessionCache::waitUntilDurable into two functions, one taking checkpoints and the other doing journal flushes, and move the logic deciding which one to call above the storage layer, probably making helper functions.&lt;/p&gt;

&lt;p&gt;It might be a good idea to start the JournalFlusher with startup parameters to tell it which function to call; or maybe just have it call a helper function that decides what to do and call it a day.&lt;/p&gt;

&lt;p&gt;We should see what we can do about moving the JournalListener up a layer(s) while we&apos;re about this. The tricky part with the JournalListener is that we need a common place to call it, so all callers update it.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1283468">SERVER-47008</key>
            <summary>Make the storage API take requests for either checkpoints or journal flushes and move the waitUntilDurable logic above the storage API</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="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Fri, 20 Mar 2020 13:28:38 +0000</created>
                <updated>Tue, 6 Dec 2022 02:32:26 +0000</updated>
                                                                            <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
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