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    <title>MongoDB Jira</title>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-8579] Consolidate Mongod Lock/Resource Scheduling Logic</title>
                <link>https://jira.mongodb.org/browse/SERVER-8579</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;A unified scheduling module would consolidate logic around what operations get dispatched in parallel with other operations (fsync+lock and reads, e.g.), could ultimately manage resources (limit iops per individual user op, or disk space dedicated to external sorts at once), and more.&lt;/p&gt;

&lt;p&gt;TODO: Fill out the description w/ a fuller design proposal.&lt;/p&gt;</description>
                <environment></environment>
        <key id="65340">SERVER-8579</key>
            <summary>Consolidate Mongod Lock/Resource Scheduling Logic</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="schwerin@mongodb.com">Andy Schwerin</reporter>
                        <labels>
                    </labels>
                <created>Thu, 14 Feb 2013 21:00:35 +0000</created>
                <updated>Thu, 2 Aug 2018 21:21:24 +0000</updated>
                            <resolved>Thu, 30 Oct 2014 21:27:47 +0000</resolved>
                                                                    <component>Concurrency</component>
                                        <votes>3</votes>
                                    <watches>16</watches>
                                                                                                                <comments>
                            <comment id="478327" author="schwerin" created="Tue, 7 Jan 2014 16:42:15 +0000"  >&lt;p&gt;Agree, needs more specification.  fsync+lock, finer granularity, like you said.  The requirements are things like &quot;critical read operations shouldn&apos;t get stuck behind undispatched writes&quot;, where critical read operations might be things like commands involved in replicaset elections.  This ticket is initially about (1), but (1) and (2)  are more the same than different, I think.  A lock on the right to do an external sort would allow you to use one set of scheduling logic for both, i.e.&lt;/p&gt;</comment>
                            <comment id="478323" author="dwight_10gen" created="Tue, 7 Jan 2014 16:37:47 +0000"  >&lt;p&gt;does this ticket refer to:&lt;br/&gt;
(1) a replacement for mongo::Lock (d_concurrency.h) that is better&lt;br/&gt;
or&lt;br/&gt;
(2) a high level scheduler that isn&apos;t so much about locking but truly about scheduling.  limiting # of ext sorts at the same time i think of as that.&lt;/p&gt;

&lt;p&gt;is the goal here to do #1 or #2?  of course there is some overlap, but i could imagine even rewritten those being separate abstractions or notions.&lt;/p&gt;
</comment>
                            <comment id="478319" author="dwight_10gen" created="Tue, 7 Jan 2014 16:34:09 +0000"  >&lt;p&gt;i think the first thing we need here is the requirements specification.  i&apos;m not clear what all is needed beyond solving fsync+lock.&lt;/p&gt;

&lt;p&gt;i suppose more hierarchy, so locks can be more granular&lt;/p&gt;

&lt;p&gt;what else?&lt;/p&gt;</comment>
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            <issuekey id="12449">SERVER-1423</issuekey>
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            <issuekey id="98240">SERVER-11670</issuekey>
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                                        <issuelink>
            <issuekey id="20480">SERVER-3531</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="37472">SERVER-5724</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="61863">SERVER-8161</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="63642">SERVER-8378</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="69945">SERVER-9147</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="22713">SERVER-3931</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="63309">SERVER-8342</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="12188">SERVER-1256</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="12449">SERVER-1423</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="21156">SERVER-3642</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="42176">SERVER-6183</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="66018">SERVER-8654</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="22074">SERVER-3801</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="63072">SERVER-8307</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="19944">SERVER-3456</issuekey>
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