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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-32821] Support rolling upgrade to new unique index format</title>
                <link>https://jira.mongodb.org/browse/SERVER-32821</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We are adding a new unique index format to support secondary apply with timestamps. The new format will remain compatible with the old format. This ticket encapsulates adding support for inserting into indexes created in the old format:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Create a test that populates a unique index in the old format, then switches to the new format and starts inserting data. (Don&#8217;t try to hook up FCV yet - that comes later, so another mechanism will be required in local testing).&lt;/li&gt;
	&lt;li&gt;Have the insert/update path identify when an old-version entry exists and remove it, prior to doing an insert.&lt;/li&gt;
	&lt;li&gt;There should be no additional work to support secondaries, but they should be tested at this stage.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="485468">SERVER-32821</key>
            <summary>Support rolling upgrade to new unique index format</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="neha.khatri">Neha Khatri</assignee>
                                    <reporter username="alexander.gorrod@mongodb.com">Alexander Gorrod</reporter>
                        <labels>
                    </labels>
                <created>Mon, 22 Jan 2018 03:42:12 +0000</created>
                <updated>Mon, 30 Oct 2023 23:09:09 +0000</updated>
                            <resolved>Fri, 2 Mar 2018 01:40:11 +0000</resolved>
                                                    <fixVersion>3.7.3</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1820727" author="xgen-internal-githook" created="Fri, 2 Mar 2018 01:37:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;neha.khatr@mongodb.com&apos;, &apos;name&apos;: &apos;nehakhatri5&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-32821&quot; title=&quot;Support rolling upgrade to new unique index format&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-32821&quot;&gt;&lt;del&gt;SERVER-32821&lt;/del&gt;&lt;/a&gt; Insert and remove support for multiversion unique index.&lt;/p&gt;

&lt;p&gt;During rolling upgrade unique index can have entries with both old and&lt;br/&gt;
new format index key. Support insert and remove for multiversion index.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/80bf700fbb9f8fb3e71fe88888f3a7fb69450ef7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/80bf700fbb9f8fb3e71fe88888f3a7fb69450ef7&lt;/a&gt;&lt;/p&gt;</comment>
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