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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-43774] ShardingTest should initiate all of its ReplSetTest shard instances in parallel</title>
                <link>https://jira.mongodb.org/browse/SERVER-43774</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, ShardingTest calls &lt;a href=&quot;https://github.com/mongodb/mongo/blob/108425fdd063a0c7dae50b2d48d3dadea35a0557/src/mongo/shell/shardingtest.js#L1284&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;initiate&lt;/a&gt; on each of its shard ReplSetTest instances serially. This means that it is not possible to initiate multiple shard replica sets at the same time. To make this initiation process faster when there are many shards, ShardingTest can initiate all ReplSetTest instances at the same time, without waiting for one to complete before moving on to the next one. It can then wait for all initiation procedures to finish. This will allow the initiation of all shard ReplSetTest instances to proceed in parallel.&lt;/p&gt;</description>
                <environment></environment>
        <key id="956937">SERVER-43774</key>
            <summary>ShardingTest should initiate all of its ReplSetTest shard instances in parallel</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="13201">Fixed</resolution>
                                        <assignee username="haley.connelly@mongodb.com">Haley Connelly</assignee>
                                    <reporter username="william.schultz@mongodb.com">William Schultz</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Wed, 2 Oct 2019 22:11:51 +0000</created>
                <updated>Sun, 29 Oct 2023 22:16:32 +0000</updated>
                            <resolved>Mon, 3 Aug 2020 22:25:37 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Replication</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="3318746" author="xgen-internal-githook" created="Mon, 3 Aug 2020 22:24:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Haley Connelly&apos;, &apos;email&apos;: &apos;haley.connelly@mongodb.com&apos;, &apos;username&apos;: &apos;haleyConnelly&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-43774&quot; title=&quot;ShardingTest should initiate all of its ReplSetTest shard instances in parallel&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-43774&quot;&gt;&lt;del&gt;SERVER-43774&lt;/del&gt;&lt;/a&gt; ShardingTest should initiate all of its ReplSetTest shard instances in parallel&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e07c2d29aded5a30ff08b5ce6a436b6ef6f44014&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e07c2d29aded5a30ff08b5ce6a436b6ef6f44014&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3186074" author="esha.maharishi@10gen.com" created="Wed, 3 Jun 2020 00:56:02 +0000"  >&lt;p&gt;Thanks &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=max.hirschhorn&quot; class=&quot;user-hover&quot; rel=&quot;max.hirschhorn&quot;&gt;max.hirschhorn&lt;/a&gt; for the investigation and detailed descriptions of the issues.&lt;/p&gt;

&lt;p&gt;I was a little iffy about ShardingTest using both async/await and parallel threads, which is why we put the ticket down before.&lt;/p&gt;

&lt;p&gt;However, I see that startSet and initiateWithAnyNodeAsPrimary are fundamentally different: parallel threads don&apos;t help much for startSet, and async/await doesn&apos;t help much for initiateWithAnyNodeAsPrimary.&lt;/p&gt;

&lt;p&gt;With this understanding, I&apos;m ok with using both. It might be nice to refactor the code in ShardingTest into two helper functions to encapsulate where we are using async/await and where we are using parallel threads.&lt;/p&gt;</comment>
                            <comment id="2601535" author="judah.schvimer" created="Thu, 12 Dec 2019 13:43:12 +0000"  >&lt;p&gt;Will this also initiate the CSRS in parallel with the shards?&lt;/p&gt;</comment>
                    </comments>
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                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="956578">SERVER-43766</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="337357">SERVER-27342</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="956932">SERVER-43773</issuekey>
        </issuelink>
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