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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-52773] Add &quot;resharding&quot; section to server status</title>
                <link>https://jira.mongodb.org/browse/SERVER-52773</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It should have metrics for the following:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;(Coordinator, Donor, Recipient) Number of resharding operations that succeed&lt;/li&gt;
	&lt;li&gt;(Coordinator, Donor, Recipient) Number of resharding operations that fail with an unrecoverable error&lt;/li&gt;
	&lt;li&gt;(Coordinator, Donor, Recipient) Number of resharding operations that are canceled by the user&lt;/li&gt;
	&lt;li&gt;(Donor) Number of write commands rejected during critical section&lt;/li&gt;
	&lt;li&gt;(Donor) Number of write commands were successful after being queued&lt;/li&gt;
	&lt;li&gt;(Recipient) Number of documents cloned&lt;/li&gt;
	&lt;li&gt;(Recipient) Bytes cloned&lt;/li&gt;
	&lt;li&gt;(Recipient) Number of oplog entries applied&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="1539084">SERVER-52773</key>
            <summary>Add &quot;resharding&quot; section to server status</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="amirsaman.memaripour@mongodb.com">Amirsaman Memaripour</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                            <label>PM-234-M3</label>
                            <label>PM-234-O-unspecialized</label>
                            <label>PM-234-T-metrics</label>
                    </labels>
                <created>Wed, 11 Nov 2020 14:30:58 +0000</created>
                <updated>Sun, 29 Oct 2023 22:00:34 +0000</updated>
                            <resolved>Wed, 6 Jan 2021 01:48:41 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3549992" author="xgen-internal-githook" created="Wed, 6 Jan 2021 01:28:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Amirsaman Memaripour&apos;, &apos;email&apos;: &apos;amirsaman.memaripour@mongodb.com&apos;, &apos;username&apos;: &apos;samanca&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-52773&quot; title=&quot;Add &amp;quot;resharding&amp;quot; section to server status&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52773&quot;&gt;&lt;del&gt;SERVER-52773&lt;/del&gt;&lt;/a&gt; Add resharding section to server status&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7a470e065d48b7871d1552c3c2a093a6a59f7f0d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7a470e065d48b7871d1552c3c2a093a6a59f7f0d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3541919" author="max.hirschhorn@10gen.com" created="Thu, 24 Dec 2020 15:02:31 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bruce.lucas&quot; class=&quot;user-hover&quot; rel=&quot;bruce.lucas&quot;&gt;bruce.lucas&lt;/a&gt;, the &quot;(Coordinator, Donor, Recipient)&quot; refers to the role that the config server and shards take on during a resharding operation. So all three being listed means that we want to track success, failure, and cancellation on every mongod within the sharded cluster. For the ones where only &quot;(Donor)&quot; or &quot;(Recipient)&quot; is listed, we&apos;ll still include the metric on every mongod but the value is only expected to be != 0 (or != -1 perhaps depending on the situation) on certain shards.&lt;/p&gt;

&lt;p&gt;Also of probable interest to you is how we intend for the schema of the new &quot;shardingStatistics.resharding&quot; section to be static. There&apos;ll be at most one resharding operation allowed to run in the sharded cluster at a time (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-52730&quot; title=&quot;Restrict there to be at most one resharding operation active in the whole cluster&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-52730&quot;&gt;&lt;del&gt;SERVER-52730&lt;/del&gt;&lt;/a&gt;) so we aren&apos;t needing to track metrics on a per-collection basis.&lt;/p&gt;</comment>
                            <comment id="3541881" author="bruce.lucas@10gen.com" created="Thu, 24 Dec 2020 13:58:25 +0000"  >&lt;p&gt;Does &quot;(Coordinator, Donor, Recpient)&quot; mean exactly 3 metrics or are those placeholder variables for shard names or something like that? If the latter I might be concerned about the number of metrics this could create.&lt;/p&gt;</comment>
                            <comment id="3485365" author="max.hirschhorn@10gen.com" created="Wed, 11 Nov 2020 14:41:27 +0000"  >&lt;p&gt;For naming some of these metrics it may be helpful to look at the description of the new/existing metrics for initial sync in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47863&quot; title=&quot;Initial Sync Progress Metrics&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47863&quot;&gt;&lt;del&gt;SERVER-47863&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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            <issuekey id="1539085">SERVER-52774</issuekey>
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            <issuekey id="1581729">DOCS-14084</issuekey>
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                            <issuelinktype id="10012">
                    <name>Related</name>
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            <issuekey id="1592604">SERVER-53842</issuekey>
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                            <customfieldvalue>This ticket adds a new section, &amp;quot;resharding&amp;quot;, under the &amp;quot;shardingStatistics&amp;quot; in {{serverStatus}} output.</customfieldvalue>

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