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    <title>MongoDB Jira</title>
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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-48446] Make donor shard&apos;s secondary pre-emptively refresh filtering cache asynchronously</title>
                <link>https://jira.mongodb.org/browse/SERVER-48446</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When secondaries perform refreshes today, it calls _flushRoutingTableCacheUpdates, waits for primary to refresh and the primary cache loader to write the new diffs to config.cache.chunks, wait for those writes to be replicated and then read the newly updated config.cache.chunks. However, this is not necessary in the donor shard since it already did the refresh as part of the migration.&lt;/p&gt;

&lt;p&gt;The proposal is:&lt;br/&gt;
1. Update the config.cache.collection with the new shard version whenever donor shard successfully commits migration.&lt;br/&gt;
2. Intercept the update in the secondary and trigger an async task to preemptively reload without calling _flushRoutingTableCacheUpdates.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1363933">SERVER-48446</key>
            <summary>Make donor shard&apos;s secondary pre-emptively refresh filtering cache asynchronously</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="4">Incomplete</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                    </labels>
                <created>Wed, 27 May 2020 18:08:44 +0000</created>
                <updated>Tue, 6 Dec 2022 02:25:48 +0000</updated>
                            <resolved>Wed, 29 Jul 2020 09:37:36 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3133378" author="kaloian.manassiev" created="Thu, 28 May 2020 07:28:44 +0000"  >&lt;p&gt;I think the write/update of config.cache.collection should happen as part of the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/3caafb39293f862dd766ecf6388cfd78a72d8bc8/src/mongo/db/s/shard_filtering_metadata_refresh.cpp#L129&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;recovery&lt;/a&gt; of the shardVersion, which is in CR now: &lt;a href=&quot;https://mongodbcr.appspot.com/611950001/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/611950001/&lt;/a&gt;&lt;/p&gt;</comment>
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