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    <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-6836] Allow index builds on secondaries with a &quot;force&quot; option.</title>
                <link>https://jira.mongodb.org/browse/SERVER-6836</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Even after &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2771&quot; title=&quot;Background index builds on replica set secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2771&quot;&gt;&lt;del&gt;SERVER-2771&lt;/del&gt;&lt;/a&gt; gets sorted out, it would be good to have better support for rolling out new indexes one replica set member at a time: since index builds, whether foreground or background, impact performance on the node, anybody who is doing slaveOk queries will probably be unhappy if all their secondaries are slow down all at the same time, typically for a long duration.&lt;/p&gt;

&lt;p&gt;So maybe createIndex could have a force option analogous to compact&apos;s, that would make the index get built even if the node is a secondary (and I think, when a node that gets a force instruction is secondary, not registering the index build in the oplog). This way, people could more conveniently deploy their indexes one node at a time without requiring the restart-without-replSet option that&apos;s needed today.&lt;/p&gt;

&lt;p&gt;(Presumably, while building indexes this way, a secondary should go into recovering mode and/or do whatever else a secondary does during compact to arrange things so that clients don&apos;t route reads to it.)&lt;/p&gt;</description>
                <environment></environment>
        <key id="47975">SERVER-6836</key>
            <summary>Allow index builds on secondaries with a &quot;force&quot; option.</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="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="richard.kreuter">Richard Kreuter</reporter>
                        <labels>
                    </labels>
                <created>Thu, 23 Aug 2012 17:52:21 +0000</created>
                <updated>Tue, 6 Dec 2022 05:30:10 +0000</updated>
                            <resolved>Mon, 4 Mar 2019 21:24:57 +0000</resolved>
                                                                    <component>Index Maintenance</component>
                    <component>Replication</component>
                                        <votes>1</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2170059" author="sara.williamson" created="Mon, 4 Mar 2019 21:24:57 +0000"  >&lt;p&gt;Rolling index builds are now automated in Atlas; this is now the recommended way to do this.&lt;/p&gt;</comment>
                            <comment id="311539" author="asya" created="Thu, 11 Apr 2013 22:24:08 +0000"  >&lt;p&gt;Customer is asking for just this exact feature - they are having trouble automating adding indexes to existing clusters since it currently involves stopping mongod and restarting with a non-standard config.&lt;/p&gt;

&lt;p&gt;They specifically asked for offline/maintenance mode for index builds on secondaries.&lt;/p&gt;</comment>
                            <comment id="205296" author="richard@10gen.com" created="Mon, 3 Dec 2012 16:22:16 +0000"  >&lt;p&gt;Andy asked me to link requests of the form &quot;command C should put node into maintenanceMode&quot; to the maintenanceMode issue.&lt;/p&gt;

&lt;p&gt;If this issue gets implemented, then the command should put the secondary into maintenanceMode.&lt;/p&gt;</comment>
                            <comment id="156171" author="richard@10gen.com" created="Thu, 23 Aug 2012 17:52:59 +0000"  >&lt;p&gt;Also has to do with index builds on secondaries, though this issue is kind of an alternative feature.&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="48450">SERVER-6883</issuekey>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="19481">SERVER-3427</issuekey>
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            <issuekey id="15135">SERVER-2771</issuekey>
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