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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-29436] InitialSyncer doesn&apos;t need to update optimes of ReplicationCoordinator until it completes successfully</title>
                <link>https://jira.mongodb.org/browse/SERVER-29436</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/244ed4e90574c41c793a8f8e7fd3a1142cb1de9f/src/mongo/db/repl/initial_syncer.h#L138&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;InitialSyncer&lt;/a&gt; updates the applied op time of the ReplicationCoordinator &lt;a href=&quot;https://github.com/mongodb/mongo/blob/244ed4e90574c41c793a8f8e7fd3a1142cb1de9f/src/mongo/db/repl/initial_syncer.cpp#L953&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;upon every successful batch application&lt;/a&gt;. It may be that this is unnecessary, since, during initial sync, the values of the applied and durable op times are not relevant for any other purpose. Only once initial sync completes successfully and we transition in to steady state replication do we really need to update a node&apos;s notion of applied op time.&lt;/p&gt;

&lt;p&gt;This change can be considered optional, but it could be a small simplification of the initial sync machinery, and be a way to reduce coupling between the InitialSyncer and the ReplicationCoordinator. This change would move the initial sync process more in the direction of being viewed an isolated state machine, that handles its own state and behaviors, independent of other replication machinery.&lt;/p&gt;</description>
                <environment></environment>
        <key id="389806">SERVER-29436</key>
            <summary>InitialSyncer doesn&apos;t need to update optimes of ReplicationCoordinator until it completes successfully</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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-repl">Backlog - Replication Team</assignee>
                                    <reporter username="william.schultz@mongodb.com">William Schultz</reporter>
                        <labels>
                            <label>neweng</label>
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                <created>Fri, 2 Jun 2017 21:43:07 +0000</created>
                <updated>Tue, 6 Dec 2022 04:00:01 +0000</updated>
                                                                            <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
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            <issuekey id="371985">SERVER-28677</issuekey>
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