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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-13938] Allow TTLMonitor to use existing indexes starting with Date field</title>
                <link>https://jira.mongodb.org/browse/SERVER-13938</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If the composite index starts with the Date field, the TTLMonitor&apos;s queries would be as fast and will not require an extra index.&lt;/p&gt;

&lt;p&gt;We have lots of time-series data with composite indexes starting with Date, we&apos;re forced to create the TTL index although it&apos;s used solely by the TTLMonitor.&lt;/p&gt;</description>
                <environment></environment>
        <key id="136375">SERVER-13938</key>
            <summary>Allow TTLMonitor to use existing indexes starting with Date field</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="yuhong.zhang@mongodb.com">Yuhong Zhang</assignee>
                                    <reporter username="alonho">Alon Horev</reporter>
                        <labels>
                            <label>TTLMonitor</label>
                            <label>execution_intern</label>
                            <label>newgrad</label>
                    </labels>
                <created>Wed, 14 May 2014 08:47:26 +0000</created>
                <updated>Fri, 21 Jul 2023 14:16:18 +0000</updated>
                            <resolved>Wed, 16 Jun 2021 03:25:42 +0000</resolved>
                                    <version>2.4.10</version>
                                    <fixVersion>5.1.0-rc0</fixVersion>
                                    <component>Storage</component>
                                        <votes>1</votes>
                                    <watches>15</watches>
                                                                                                                <comments>
                            <comment id="5582821" author="JIRAUSER1262765" created="Fri, 21 Jul 2023 14:16:18 +0000"  >&lt;p&gt;+1 for 5.0 backport&lt;/p&gt;</comment>
                            <comment id="3880427" author="xgen-internal-githook" created="Wed, 16 Jun 2021 08:30:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;danielzhangyh@gmail.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-13938&quot; title=&quot;Allow TTLMonitor to use existing indexes starting with Date field&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-13938&quot;&gt;&lt;del&gt;SERVER-13938&lt;/del&gt;&lt;/a&gt; Enabling adding expireAfterSeconds to convert to a TTL index&lt;br/&gt;
Branch: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34632&quot; title=&quot;config.chunks change to config.cache.chunks creates a collection long name after upgrade&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34632&quot;&gt;SERVER-34632&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2b7d1168d19abc570e00c337ba05e66a98d7fb83&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2b7d1168d19abc570e00c337ba05e66a98d7fb83&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3879910" author="xgen-internal-githook" created="Tue, 15 Jun 2021 22:57:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;danielzhangyh@gmail.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-13938&quot; title=&quot;Allow TTLMonitor to use existing indexes starting with Date field&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-13938&quot;&gt;&lt;del&gt;SERVER-13938&lt;/del&gt;&lt;/a&gt; Enabling adding expireAfterSeconds to convert to a TTL index&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2b7d1168d19abc570e00c337ba05e66a98d7fb83&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2b7d1168d19abc570e00c337ba05e66a98d7fb83&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="1784606">DOCS-14569</issuekey>
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                            <issuelinktype id="10010">
                    <name>Duplicate</name>
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                                        <issuelink>
            <issuekey id="71264">SERVER-9305</issuekey>
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                            <issuelinktype id="10520">
                    <name>Problem/Incident</name>
                                            <outwardlinks description="causes">
                                        <issuelink>
            <issuekey id="1907560">SERVER-60956</issuekey>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
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            <issuekey id="71264">SERVER-9305</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1987704">SERVER-63876</issuekey>
        </issuelink>
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                            <customfieldvalue>Non-TTL indexes could not be converted to TTL indexes before and will error if tried with collMod command. This ticket enables using collMod to achieve the task. Under such a circumstance, the command returns only the new value of &amp;quot;expireAfterSeconds&amp;quot;.</customfieldvalue>

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