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    <title>MongoDB Jira</title>
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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-71145] Allow observed all_durable to move backward</title>
                <link>https://jira.mongodb.org/browse/SERVER-71145</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;all_durable&lt;/tt&gt; timestamp is maintained by the storage engine and may move backward. In the MongoDB integration with WT, we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/6cdb5546daa6fd7cc93feac639f04925dcc7919b/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.h#L550-L552&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;keep track of the highest seen &lt;tt&gt;all_durable&lt;/tt&gt;&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/6cdb5546daa6fd7cc93feac639f04925dcc7919b/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp#L2417-L2423&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;use that instead if the &lt;tt&gt;all_durable&lt;/tt&gt; returned from WT is lower&lt;/a&gt;. This behavior was previously necessary due to ghost timestamps. Now with ghost timestamps having given up the ghost, we should be able to remove this and simply always return the &lt;tt&gt;all_durable&lt;/tt&gt; that WT reports.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2176962">SERVER-71145</key>
            <summary>Allow observed all_durable to move backward</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.noma@mongodb.com">Gregory Noma</assignee>
                                    <reporter username="gregory.noma@mongodb.com">Gregory Noma</reporter>
                        <labels>
                    </labels>
                <created>Mon, 7 Nov 2022 20:52:22 +0000</created>
                <updated>Sun, 29 Oct 2023 21:30:56 +0000</updated>
                            <resolved>Tue, 8 Nov 2022 21:45:14 +0000</resolved>
                                                    <fixVersion>6.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4965001" author="xgen-internal-githook" created="Tue, 8 Nov 2022 21:43:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Noma&apos;, &apos;email&apos;: &apos;gregory.noma@gmail.com&apos;, &apos;username&apos;: &apos;gregorynoma&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71145&quot; title=&quot;Allow observed all_durable to move backward&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71145&quot;&gt;&lt;del&gt;SERVER-71145&lt;/del&gt;&lt;/a&gt; Allow observed `all_durable` to move backward&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/36133c3b97aed247975af7940fb3b14ac40b38cc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/36133c3b97aed247975af7940fb3b14ac40b38cc&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="1052455">SERVER-45147</issuekey>
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            <issuekey id="2176980">SERVER-71148</issuekey>
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