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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-5723] separate journaling per database</title>
                <link>https://jira.mongodb.org/browse/SERVER-5723</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Rather than committing all the open databases at once.  This will allow better performance with db level locking, as well as simplifying the GlobalWriteLock consumers.&lt;/p&gt;</description>
                <environment></environment>
        <key id="37469">SERVER-5723</key>
            <summary>separate journaling per database</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-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Mon, 30 Apr 2012 17:07:41 +0000</created>
                <updated>Tue, 6 Dec 2022 05:33:40 +0000</updated>
                            <resolved>Wed, 16 Nov 2016 18:40:11 +0000</resolved>
                                    <version>2.1.1</version>
                                                    <component>MMAPv1</component>
                    <component>Storage</component>
                                        <votes>2</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1435826" author="milkie" created="Wed, 16 Nov 2016 18:40:11 +0000"  >&lt;p&gt;No longer considering this for MMAPv1.&lt;/p&gt;</comment>
                            <comment id="209333" author="bascott@enphaseenergy.com" created="Fri, 7 Dec 2012 21:48:46 +0000"  >&lt;p&gt;Please consider segregating both journaling AND oplogging per database.&lt;/p&gt;

&lt;p&gt;I just broke our replication set (second time in a week I&apos;m going to spend all day rebuilding) by making a copy of the local database.  When the secondary went to replicate that copy, rsSync throws:&lt;br/&gt;
Fri Dec  7 10:35:33 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; replSet syncTail: 10156 cannot update system collection: copylocal.system.replset q: &lt;/p&gt;
{ _id: &quot;emu_reports&quot; }
&lt;p&gt; u: { _id: &quot;emu_reports&quot;, version: 20, members: [ &lt;/p&gt;
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&lt;p&gt;, &lt;/p&gt;
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&lt;p&gt;, &lt;/p&gt;
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&lt;p&gt; ] }, syncing: { ts: Timestamp 1354905297000|120, h: -8769419479077831402, op: &quot;i&quot;, ns: &quot;copylocal.system.replset&quot;, o: { _id: &quot;emu_reports&quot;, version: 20, members: [ &lt;/p&gt;
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&lt;p&gt;, &lt;/p&gt;
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&lt;p&gt;, &lt;/p&gt;
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&lt;p&gt; ] } }&lt;/p&gt;

&lt;p&gt;And three hours later, our oplog runs out.  grr.  A failure in one database taking down a whole replica set seems avoidable by this sort of segregation.&lt;/p&gt;</comment>
                            <comment id="114899" author="schwerin" created="Mon, 30 Apr 2012 17:15:44 +0000"  >&lt;p&gt;To clarify, we&apos;d have a single journal, still, just we wouldn&apos;t do the journal committing for all dbs at once.&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is duplicated by">
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            <issuekey id="88135">SERVER-10658</issuekey>
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