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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-58575] Replace the logic that decides whether the SSCCL should use namespaces or uuids for config.cache.chunks collections</title>
                <link>https://jira.mongodb.org/browse/SERVER-58575</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The goal of this task is to replace the timestamp-based logic that we have in the SSCCL to decide whether it has to use &lt;tt&gt;nss&lt;/tt&gt; or &lt;tt&gt;uuid&lt;/tt&gt; by the new flag. Note that this include two changes:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;We have to change the functions that insert/update/drop information to &lt;tt&gt;config.cache.chunks.*&lt;/tt&gt; so they rely on the new flag.&lt;/li&gt;
	&lt;li&gt;The transition from &lt;tt&gt;nss&lt;/tt&gt; to &lt;tt&gt;uuid&lt;/tt&gt; (and vice versa).  Basically we have to rewrite the condition of &lt;a href=&quot;https://github.com/mongodb/mongo/blob/41ce5b863fcf7387808b32bb9af6149afad7eb3b/src/mongo/db/s/shard_server_catalog_cache_loader.cpp#L821-L824&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this if-stmt&lt;/a&gt; in such a way that if it detects that the value of the flag changed it triggers the rename. The tricky part here is how to detect that the value that the shard has locally is different from the one it got from the CS. Open question: can we have something in memory so we don&apos;t have to go to disk?&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Note that we will have to update some LOG messages too.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1819999">SERVER-58575</key>
            <summary>Replace the logic that decides whether the SSCCL should use namespaces or uuids for config.cache.chunks 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="13201">Fixed</resolution>
                                        <assignee username="antonio.fuschetto@mongodb.com">Antonio Fuschetto</assignee>
                                    <reporter username="sergi.mateo-bellido@mongodb.com">Sergi Mateo Bellido</reporter>
                        <labels>
                    </labels>
                <created>Thu, 15 Jul 2021 08:56:26 +0000</created>
                <updated>Sun, 29 Oct 2023 21:50:52 +0000</updated>
                            <resolved>Wed, 18 Aug 2021 07:22:07 +0000</resolved>
                                                    <fixVersion>5.1.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="4106766" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 18:08:17 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
                            <comment id="4005883" author="xgen-internal-githook" created="Wed, 18 Aug 2021 07:19:34 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Antonio Fuschetto&apos;, &apos;email&apos;: &apos;antonio.fuschetto@mongodb.com&apos;, &apos;username&apos;: &apos;afuschetto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58575&quot; title=&quot;Replace the logic that decides whether the SSCCL should use namespaces or uuids for config.cache.chunks collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58575&quot;&gt;&lt;del&gt;SERVER-58575&lt;/del&gt;&lt;/a&gt; Replace the logic that decides whether the SSCCL should use namespaces or uuids for config.cache.chunks collections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1d6b7bab47918cbf1b6361e9f29f3f91e8441698&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1d6b7bab47918cbf1b6361e9f29f3f91e8441698&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4003112" author="xgen-internal-githook" created="Tue, 17 Aug 2021 03:55:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;, &apos;username&apos;: &apos;dgottlieb&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58575&quot; title=&quot;Replace the logic that decides whether the SSCCL should use namespaces or uuids for config.cache.chunks collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58575&quot;&gt;&lt;del&gt;SERVER-58575&lt;/del&gt;&lt;/a&gt; Replace the logic that decides whether the SSCCL should use namespaces or uuids for config.cache.chunks collections&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 0d9c8e78185156a008f5c4557188fa9ecbbdc36b.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/07507a2318e63043d4b6bb8c1d0d342e0076291f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/07507a2318e63043d4b6bb8c1d0d342e0076291f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4001328" author="xgen-internal-githook" created="Mon, 16 Aug 2021 14:25:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Antonio Fuschetto&apos;, &apos;email&apos;: &apos;antonio.fuschetto@mongodb.com&apos;, &apos;username&apos;: &apos;afuschetto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58575&quot; title=&quot;Replace the logic that decides whether the SSCCL should use namespaces or uuids for config.cache.chunks collections&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58575&quot;&gt;&lt;del&gt;SERVER-58575&lt;/del&gt;&lt;/a&gt; Replace the logic that decides whether the SSCCL should use namespaces or uuids for config.cache.chunks collections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0d9c8e78185156a008f5c4557188fa9ecbbdc36b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0d9c8e78185156a008f5c4557188fa9ecbbdc36b&lt;/a&gt;&lt;/p&gt;</comment>
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