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    <title>MongoDB Jira</title>
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    <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>[DOCS-14569] Investigate changes in SERVER-13938: Allow TTLMonitor to use existing indexes starting with Date field</title>
                <link>https://jira.mongodb.org/browse/DOCS-14569</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;

    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #c2d2c2;&quot;&gt;
&lt;p&gt;    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 &quot;expireAfterSeconds&quot;.&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&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;


&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
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                <environment></environment>
        <key id="1784606">DOCS-14569</key>
            <summary>Investigate changes in SERVER-13938: Allow TTLMonitor to use existing indexes starting with Date field</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="naomi.pentrel@mongodb.com">Naomi Pentrel</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Wed, 16 Jun 2021 03:25:45 +0000</created>
                <updated>Mon, 13 Nov 2023 17:52:23 +0000</updated>
                            <resolved>Fri, 3 Sep 2021 15:50:42 +0000</resolved>
                                                    <fixVersion>5.1.0-rc0</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4039241" author="xgen-internal-githook" created="Fri, 3 Sep 2021 15:46:06 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Naomi Pentrel&apos;, &apos;email&apos;: &apos;5212232+npentrel@users.noreply.github.com&apos;, &apos;username&apos;: &apos;npentrel&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-14569&quot; title=&quot;Investigate changes in SERVER-13938: Allow TTLMonitor to use existing indexes starting with Date field&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-14569&quot;&gt;&lt;del&gt;DOCS-14569&lt;/del&gt;&lt;/a&gt;: Allow collMod to convert into ttl&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/d3b1088403598150f679b3525b491e58d90aadda&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/d3b1088403598150f679b3525b491e58d90aadda&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3918077" author="naomi.pentrel" created="Tue, 6 Jul 2021 14:56:22 +0000"  >&lt;p&gt;Moving this to blocked until the 5.1 branch is ready&lt;/p&gt;</comment>
                            <comment id="3918074" author="naomi.pentrel" created="Tue, 6 Jul 2021 14:55:37 +0000"  >&lt;p&gt;CR:&#160;&lt;a href=&quot;https://mongodbcr.appspot.com/815980001/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/815980001/&lt;/a&gt;&lt;/p&gt;</comment>
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