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    <title>MongoDB Jira</title>
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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-56206] Make the estimation of remaining time in resharding more robust</title>
                <link>https://jira.mongodb.org/browse/SERVER-56206</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The resharding coordinator consumes the estimation of remaining operation time, reported by the recipients, to engage the critical section when recipients are about to finishing cloning and applying oplog entries.&lt;/p&gt;

&lt;p&gt;However, the estimation does not consider the possibility of having no oplog entries to fetch/apply. When there are no oplog entries to fetch, the estimation algorithm assumes fetching/applying oplog entires will take as long as the duration of cloning from donors, and the estimated remaining time will never reach zero. This would prevent the coordinator from automatically engaging the critical section.&lt;/p&gt;

&lt;p&gt;This ticket should improve the estimation algorithm (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/1203b3cf635f14937b93ff60386a2067e73b4b01/src/mongo/db/s/resharding/resharding_metrics.cpp#L387-L399&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;) to account for the aforementioned situations.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1684192">SERVER-56206</key>
            <summary>Make the estimation of remaining time in resharding more robust</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="janna.golden@mongodb.com">Janna Golden</assignee>
                                    <reporter username="amirsaman.memaripour@mongodb.com">Amirsaman Memaripour</reporter>
                        <labels>
                            <label>PM-234-M3</label>
                            <label>PM-234-T-autocommits</label>
                    </labels>
                <created>Tue, 20 Apr 2021 17:35:02 +0000</created>
                <updated>Sun, 29 Oct 2023 21:54:45 +0000</updated>
                            <resolved>Mon, 10 May 2021 16:58:50 +0000</resolved>
                                                    <fixVersion>5.0.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3764265" author="xgen-internal-githook" created="Mon, 10 May 2021 16:55:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;jannaerin&apos;, &apos;email&apos;: &apos;golden.janna@gmail.com&apos;, &apos;username&apos;: &apos;jannaerin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-56206&quot; title=&quot;Make the estimation of remaining time in resharding more robust&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-56206&quot;&gt;&lt;del&gt;SERVER-56206&lt;/del&gt;&lt;/a&gt; Make the estimation of remaining time in resharding more robust&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d2fbca2bbf1e878745abf58f68f066883d191e44&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d2fbca2bbf1e878745abf58f68f066883d191e44&lt;/a&gt;&lt;/p&gt;</comment>
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