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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-38027] Partially turn on hybrid index builds for background, non-unique indexes</title>
                <link>https://jira.mongodb.org/browse/SERVER-38027</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This ticket is to turn on (a degraded version) of hybrid index builds for background, non-unique indexes.&lt;/p&gt;

&lt;p&gt;Specifically:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;On a background non-unique index build, install the interceptor that directs client writes to a side-table instead of directly going into the index.&lt;/li&gt;
	&lt;li&gt;If trivial, use the external sorter for the table scanning part of the index build. Otherwise, run the hybrid index build in a degraded mode where a bulk insert cursor is not used. The latter case is the expected outcome.&lt;/li&gt;
	&lt;li&gt;After the table scan completes, consume the side-table writes adding them back to the real index.&lt;/li&gt;
	&lt;li&gt;??? (make sure the index catalog multikey state is correct)&lt;/li&gt;
	&lt;li&gt;Profit. (Complete the index build and remove the interceptor.)&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="631312">SERVER-38027</key>
            <summary>Partially turn on hybrid index builds for background, non-unique indexes</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="louis.williams@mongodb.com">Louis Williams</assignee>
                                    <reporter username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</reporter>
                        <labels>
                    </labels>
                <created>Thu, 8 Nov 2018 15:57:05 +0000</created>
                <updated>Sun, 29 Oct 2023 22:26:43 +0000</updated>
                            <resolved>Thu, 29 Nov 2018 18:11:36 +0000</resolved>
                                                    <fixVersion>4.1.6</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2075748" author="xgen-internal-githook" created="Thu, 29 Nov 2018 18:11:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Louis Williams&apos;, &apos;email&apos;: &apos;louis.williams@mongodb.com&apos;, &apos;username&apos;: &apos;louiswilliams&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38027&quot; title=&quot;Partially turn on hybrid index builds for background, non-unique indexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38027&quot;&gt;&lt;del&gt;SERVER-38027&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37268&quot; title=&quot;Change BG index build to use the Bulk builder and external sorter&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37268&quot;&gt;&lt;del&gt;SERVER-37268&lt;/del&gt;&lt;/a&gt; Partially enable hybrid index builds for background, non-unique indexes. Change background index builds to use the bulk builder and external sorter&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ca1cccb8a18be76c584f587e04b14512e59d8424&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ca1cccb8a18be76c584f587e04b14512e59d8424&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="608267">SERVER-37263</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="635391">SERVER-38187</issuekey>
        </issuelink>
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            <issuekey id="608268">SERVER-37264</issuekey>
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