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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-67597] Handle new time-series bucketing parameters on downgrade</title>
                <link>https://jira.mongodb.org/browse/SERVER-67597</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;On attempted downgrade, we need to check each time-series collection and ensure that &apos;bucketMaxSpanSeconds&apos; and &apos;bucketRoundingSeconds&apos; correspond to a valid &apos;granularity&apos; setting, and refuse to perform the downgrade if not.&lt;/p&gt;

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

&lt;p&gt;Additionally, we need to ensure that &apos;granularity&apos; is set to the appropriate value, and remove &apos;bucketRoundingSeconds&apos; from the options in order to proceed with the downgrade.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2078468">SERVER-67597</key>
            <summary>Handle new time-series bucketing parameters on downgrade</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="fausto.leyva@mongodb.com">Fausto Leyva</assignee>
                                    <reporter username="dan.larkin-york@mongodb.com">Dan Larkin-York</reporter>
                        <labels>
                    </labels>
                <created>Tue, 28 Jun 2022 13:21:52 +0000</created>
                <updated>Sun, 29 Oct 2023 21:36:19 +0000</updated>
                            <resolved>Wed, 26 Oct 2022 21:18:42 +0000</resolved>
                                                    <fixVersion>6.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4929908" author="xgen-internal-githook" created="Wed, 26 Oct 2022 19:45:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Faustoleyva54&apos;, &apos;email&apos;: &apos;fausto.leyva@mongodb.com&apos;, &apos;username&apos;: &apos;Faustoleyva54&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-67597&quot; title=&quot;Handle new time-series bucketing parameters on downgrade&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-67597&quot;&gt;&lt;del&gt;SERVER-67597&lt;/del&gt;&lt;/a&gt; Handle new time-series bucketing parameters on downgrade&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/73fa6daf31440329b55d0971998e8c0359f08392&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/73fa6daf31440329b55d0971998e8c0359f08392&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2078428">SERVER-67595</issuekey>
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                        <customfieldname>Special Downgrade Instructions</customfieldname>
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                            <customfieldvalue>If all timeseries collections have standard granularity values (seconds, minutes, hours) then nothing has to be done to downgrade. If custom bucketing parameters were introduced to collections, users will have to use collMod in order to change their custom parameters to one of the standard granularity values. For example, If a user has custom values for {bucketMaxSpanSeconds = 2000, bucketRoundingSeconds = 2000}, they can use collMod to change the granularity to &amp;#39;minutes&amp;#39; and then downgrade. Unfortunately, if the custom values are greater than &amp;quot;86400&amp;quot; the only way to successfully downgrade is to drop the collection.</customfieldvalue>

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