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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>
    </build-info>


<item>
            <title>[SERVER-73846] Reduce Migrations via Thread affinity on 5.0.13</title>
                <link>https://jira.mongodb.org/browse/SERVER-73846</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;During the testing of Mongodb with YCSB client (at the time of experiment the YCSB java code only works with v5.0 of the server), &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=uttampc&quot; class=&quot;user-hover&quot; rel=&quot;uttampc&quot;&gt;uttampc&lt;/a&gt; discovered a large number of migrations statistics as reported by &quot;perf stat&quot; command. See details below,&lt;/p&gt;
&lt;div class=&apos;table-wrap&apos;&gt;
&lt;table class=&apos;confluenceTable&apos;&gt;&lt;tbody&gt;
&lt;tr&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;Event&lt;/th&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;Baseline&lt;/th&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;Baseline&lt;/th&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;Threads&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;40&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;80&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;Throughput&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;337,008&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;304,580&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;sched:sched_process_free&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;13&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;18&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;sched:sched_process_exit&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;13&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;16&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;sched:sched_process_wait&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;34&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;34&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;sched:sched_process_fork&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;11&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;15&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;sched:sched_process_exec&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;10&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;11&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;sched:sched_process_hang&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;0&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;0&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;task:task_newtask&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;11&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;15&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;task:task_rename&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;10&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;14&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;L1-dcache-loads&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;1,406,341,217,349&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;1,321,016,036,512&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;L1-dcache_load_misses&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;140,998,950,663&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;148,306,686,642&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;cycles&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;8,938,835,361,677&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;9,556,957,123,623&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;cs&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;199,014,407&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;179,466,722&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;&lt;b&gt;migrations&lt;/b&gt;&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;&lt;b&gt;411,085&lt;/b&gt;&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;&lt;b&gt;37,726,014&lt;/b&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;Elapsed time (sec)&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;60&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;60&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;&lt;/table&gt;
&lt;/div&gt;


&lt;p&gt;As you can see from the table above, the migrations stats is quite high. With addition of few lines of &quot;thread affinity&quot; code in the &quot;runFunc&quot; function which is a thread function per connection, I was able to see almost&#160;&lt;b&gt;70% reduction&lt;/b&gt;&#160;in this number with a small improvement (2% to 5%) in overall throughput.&lt;/p&gt;

&lt;p&gt;New data snapshot,&lt;/p&gt;
&lt;div class=&apos;table-wrap&apos;&gt;
&lt;table class=&apos;confluenceTable&apos;&gt;&lt;tbody&gt;
&lt;tr&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;Event&lt;/th&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;Thread-affinity&lt;/th&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;Thread-affinity&lt;/th&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;Threads&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;40&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;80&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;Throughput&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;342,339&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;325,860&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;&lt;b&gt;migrations&lt;/b&gt;&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;&lt;b&gt;38,418&lt;/b&gt;&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;&lt;b&gt;9,116,093&lt;/b&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;Elapsed time (sec)&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;60&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;60&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;&lt;/table&gt;
&lt;/div&gt;


&lt;p&gt;I started with upstream docker version of mongodb server which was based on v5.0.13 at the time hence this PR is based on v5.0 branch.&lt;/p&gt;

&lt;p&gt;No. records: 40M&lt;br/&gt;
Type of Request: Read-Only queries.&lt;/p&gt;

&lt;p&gt;YCSB Commands:&lt;br/&gt;
Loading of the database:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 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;$ python2.&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;7&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; ./bin/ycsb load mongodb -jvm-args=&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;-Dlogback.configurationFile=../logback.xml&quot;&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; -s -P workloads/workloadc -threads &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;20&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; -p mongodb.url=mongodb:&lt;/span&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;//localhost/ycsb&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Execution of queries (40 threads)&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 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;$ python2.&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;7&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; ./bin/ycsb run mongodb -jvm-args=&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;-Dlogback.configurationFile=../logback.xml&quot;&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; -s -P workloads/workloadc -threads &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;40&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; -p mongodb.url=mongodb:&lt;/span&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;//localhost/ycsb&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Execution of queries (80 threads)&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 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;$ python2.&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;7&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; ./bin/ycsb run mongodb -jvm-args=&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;-Dlogback.configurationFile=../logback.xml&quot;&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; -s -P workloads/workloadc -threads &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;80&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; -p mongodb.url=mongodb:&lt;/span&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;//localhost/ycsb&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Perf command&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 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;$ sudo perf stat -e &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;sched:sched_process*,task:*,L1-dcache-loads,L1-dcache-load-misses,cycles,cs,faults,migrations&quot;&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; -d -d -d -a &#8211; sleep &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;60&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;PR: &lt;a href=&quot;https://github.com/mongodb/mongo/pull/1525&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/pull/1525&lt;/a&gt;&#160;&lt;/p&gt;</description>
                <environment>Server: Icelake server&lt;br/&gt;
OS: Ubuntu 20.04.2 LTS&lt;br/&gt;
Kernel: 5.4.0-65-generic&lt;br/&gt;
Compiler: gcc version 10.3.0 (Ubuntu 10.3.0-1ubuntu1~20.04)</environment>
        <key id="2259348">SERVER-73846</key>
            <summary>Reduce Migrations via Thread affinity on 5.0.13</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="4">Incomplete</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="chris.kelly@mongodb.com">Chris Kelly</reporter>
                        <labels>
                            <label>pull-request</label>
                    </labels>
                <created>Thu, 9 Feb 2023 18:14:57 +0000</created>
                <updated>Tue, 7 Mar 2023 01:24:51 +0000</updated>
                            <resolved>Tue, 7 Mar 2023 01:24:51 +0000</resolved>
                                    <version>5.0.13</version>
                                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="5184042" author="uttampc" created="Thu, 9 Feb 2023 18:51:33 +0000"  >&lt;p&gt;Just checking the access.&#160;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2271290">SERVER-74243</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                    </issuelinks>
                <attachments>
                    </attachments>
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