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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-10524] Add diagnostic information about multi-update/removes in oplog</title>
                <link>https://jira.mongodb.org/browse/SERVER-10524</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Add an runtime ServerParameter to allow annotating fan-out operations in the oplog.&lt;/p&gt;

&lt;p&gt;For any fan-out (multi-update/remove) we can add an operation-id to each oplog entry which results from that operation as executed on the primary. In addition we would log a no-op oplog entry with the orig. query+update ( with only the operations and their paths so we don&apos;t log the orig data completely).&lt;/p&gt;

&lt;p&gt;With this information in the oplog we can easily detect inefficiencies in the replication process or costly operations via replication. This would also allow more explicit understanding of the root operation and its effects via replication.&lt;/p&gt;

&lt;p&gt;Here is an example oplog sequence in this mode:&lt;/p&gt;
&lt;p/&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; opid:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;123123&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;}&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ts:..., h:..., op:u, o2:{_id:x}, &lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="86082">SERVER-10524</key>
            <summary>Add diagnostic information about multi-update/removes in oplog</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="scotthernandez">Scott Hernandez</reporter>
                        <labels>
                    </labels>
                <created>Thu, 15 Aug 2013 15:10:26 +0000</created>
                <updated>Tue, 6 Dec 2022 05:18:45 +0000</updated>
                            <resolved>Thu, 6 Sep 2018 20:22:22 +0000</resolved>
                                                                    <component>Replication</component>
                    <component>Write Ops</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
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