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    <title>MongoDB Jira</title>
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    <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-21129] Allow pipelining of applier work before updating-position/reporting</title>
                <link>https://jira.mongodb.org/browse/SERVER-21129</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently the applier must (sequentially) do the following in a loop:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;batch oplog entries&lt;/li&gt;
	&lt;li&gt;apply and record in local oplog&lt;/li&gt;
	&lt;li&gt;journal, including minvalid&lt;/li&gt;
	&lt;li&gt;report/update-position&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;The task here is to break the last two steps (journal + reporting) into a separate process which doesn&apos;t block the next batch from starting/applying. This should allow higher throughput on the replicas without adversely affecting latency.&lt;/p&gt;</description>
                <environment></environment>
        <key id="236161">SERVER-21129</key>
            <summary>Allow pipelining of applier work before updating-position/reporting</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="9">Done</resolution>
                                        <assignee username="matt.dannenberg">Matt Dannenberg</assignee>
                                    <reporter username="scotthernandez">Scott Hernandez</reporter>
                        <labels>
                    </labels>
                <created>Mon, 26 Oct 2015 16:40:10 +0000</created>
                <updated>Thu, 10 Mar 2016 17:05:57 +0000</updated>
                            <resolved>Fri, 30 Oct 2015 20:26:08 +0000</resolved>
                                                    <fixVersion>3.2.0-rc2</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1075777" author="xgen-internal-githook" created="Fri, 30 Oct 2015 20:25:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dannenberg&apos;, u&apos;name&apos;: u&apos;matt dannenberg&apos;, u&apos;email&apos;: u&apos;matt.dannenberg@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-21129&quot; title=&quot;Allow pipelining of applier work before updating-position/reporting&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-21129&quot;&gt;&lt;del&gt;SERVER-21129&lt;/del&gt;&lt;/a&gt; wait for batch apply flush in a separate thread&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/847c0f67ad0f8f0469c7e4afb0936741ec0baafe&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/847c0f67ad0f8f0469c7e4afb0936741ec0baafe&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1070822" author="scotthernandez" created="Mon, 26 Oct 2015 20:02:24 +0000"  >&lt;p&gt;Matt, let&apos;s talk in the morning so we can get a spike done asap.&lt;/p&gt;</comment>
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            <issuekey id="237167">SERVER-21237</issuekey>
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            <issuelink>
            <issuekey id="235971">SERVER-21107</issuekey>
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            <issuekey id="271477">SERVER-23046</issuekey>
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