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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-49793] Keep track of active transactions in ephemeralForTest to compute the all durable timestamp</title>
                <link>https://jira.mongodb.org/browse/SERVER-49793</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In order to compute the all durable timestamp for ephemeralForTest, we need to keep track of active transactions in ephemeralForTest. All transactions with timestamps earlier than the all durable timestamp are committed.&lt;/p&gt;

&lt;p&gt;With this, we should be able to implement the&#160;&lt;b&gt;kAllDurableSnapshot&lt;/b&gt; ReadSource in ephemeralForTest&apos;s RecoveryUnit.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; it&apos;s possible to commit new transactions earlier than the all durable timestamp but no earlier than the oldest timestamp. With that, we should prevent the all durable timestamp from going backwards.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Note 2&lt;/b&gt;: if &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49792&quot; title=&quot;Implement a snapshot manager for ephemeralForTest&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49792&quot;&gt;&lt;del&gt;SERVER-49792&lt;/del&gt;&lt;/a&gt; is completed before this, then this ticket should also implement the&#160;&lt;b&gt;kNoOverlap&lt;/b&gt; ReadSource in ephemeralForTest&apos;s RecoveryUnit. The no overlap timestamp is the minimum of the all durable and last applied timestamps.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1416483">SERVER-49793</key>
            <summary>Keep track of active transactions in ephemeralForTest to compute the all durable timestamp</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="bynn.lee@mongodb.com">Bynn Lee</assignee>
                                    <reporter username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</reporter>
                        <labels>
                            <label>intern_ephemeral_for_test</label>
                    </labels>
                <created>Wed, 22 Jul 2020 05:11:56 +0000</created>
                <updated>Wed, 22 Jul 2020 18:50:19 +0000</updated>
                            <resolved>Wed, 22 Jul 2020 13:45:22 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3296341" author="gregory.wlodarek" created="Wed, 22 Jul 2020 13:45:22 +0000"  >&lt;p&gt;Turns out the all durable timestamp for ephemeralForTest is already implemented via the visibility manager:&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/86d94765b9030c9aa9adb3899277456e64bbd348/src/mongo/db/storage/ephemeral_for_test/ephemeral_for_test_kv_engine.h#L133-L136&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/86d94765b9030c9aa9adb3899277456e64bbd348/src/mongo/db/storage/ephemeral_for_test/ephemeral_for_test_kv_engine.h#L133-L136&lt;/a&gt;&lt;/p&gt;</comment>
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