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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>[SERVER-52588] Making the upgrade/downgrade process work for the Epoch to ClusterTime migration</title>
                <link>https://jira.mongodb.org/browse/SERVER-52588</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The goal of this task is to define and implement the downgrade/upgrade process that transforms database/chunk versions that work with epochs into versions that work with ClusterTime and viceversa.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;On downgrade from 5.0 to 4.4, the &lt;tt&gt;timestamp&lt;/tt&gt; field of DatabaseType, CollectionType and ShardCollectionType will need to be deleted.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1532032">SERVER-52588</key>
            <summary>Making the upgrade/downgrade process work for the Epoch to ClusterTime migration</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="13201">Fixed</resolution>
                                        <assignee username="jordi.serra-torrens@mongodb.com">Jordi Serra Torrens</assignee>
                                    <reporter username="sergi.mateo-bellido@mongodb.com">Sergi Mateo Bellido</reporter>
                        <labels>
                            <label>PM-1965-Milestone-0-Metadata-Format</label>
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                <created>Tue, 3 Nov 2020 07:49:27 +0000</created>
                <updated>Sun, 29 Oct 2023 22:00:56 +0000</updated>
                            <resolved>Thu, 3 Dec 2020 10:47:33 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3513961" author="xgen-internal-githook" created="Thu, 3 Dec 2020 10:45:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Serra Torrens&apos;, &apos;email&apos;: &apos;jordi.serra-torrens@mongodb.com&apos;, &apos;username&apos;: &apos;jordist&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-52588&quot; title=&quot;Making the upgrade/downgrade process work for the Epoch to ClusterTime migration&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52588&quot;&gt;&lt;del&gt;SERVER-52588&lt;/del&gt;&lt;/a&gt; Making the upgrade/downgrade process work for the Epoch to ClusterTime migration (PART-2)&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e5e066a1daf41b2bcb414e4a4729e4fd3b0c1a32&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e5e066a1daf41b2bcb414e4a4729e4fd3b0c1a32&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3510015" author="xgen-internal-githook" created="Tue, 1 Dec 2020 12:22:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Serra Torrens&apos;, &apos;email&apos;: &apos;jordi.serra-torrens@mongodb.com&apos;, &apos;username&apos;: &apos;jordist&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-52588&quot; title=&quot;Making the upgrade/downgrade process work for the Epoch to ClusterTime migration&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52588&quot;&gt;&lt;del&gt;SERVER-52588&lt;/del&gt;&lt;/a&gt; Making the upgrade/downgrade process work for the Epoch to ClusterTime migration&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b85442ba1cc20270a3595bba769438394a66e7e4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b85442ba1cc20270a3595bba769438394a66e7e4&lt;/a&gt;&lt;/p&gt;</comment>
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