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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>[SERVER-52524] create secondary indexes on time-series collections</title>
                <link>https://jira.mongodb.org/browse/SERVER-52524</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;A system.buckets collection should be indexed on  `control.max.time`.&lt;/p&gt;

&lt;p&gt;We may create one or two secondary indexes depending on whether a metadata field is configured for the time-series collection:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Defining a meta field results in two more secondary indexes:
	&lt;ul&gt;
		&lt;li&gt;{ meta: 1, control.max.time: 1 }&lt;/li&gt;
		&lt;li&gt;{ control.max.time: 1, meta: 1 }.&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;If no meta field is defined at time series creation time, just one secondary index is created, on { control.max.time: 1 }.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="1530755">SERVER-52524</key>
            <summary>create secondary indexes on time-series collections</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="3">Duplicate</resolution>
                                        <assignee username="geert.bosch@mongodb.com">Geert Bosch</assignee>
                                    <reporter username="benety.goh@mongodb.com">Benety Goh</reporter>
                        <labels>
                    </labels>
                <created>Sat, 31 Oct 2020 16:32:35 +0000</created>
                <updated>Wed, 2 Dec 2020 18:00:32 +0000</updated>
                            <resolved>Wed, 2 Dec 2020 18:00:32 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="3512897" author="geert.bosch" created="Wed, 2 Dec 2020 18:00:32 +0000"  >&lt;p&gt;We&apos;re not going to add any secondary indexes by default, as users typically want to index specific metadata fields.&lt;/p&gt;</comment>
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