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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>
    </build-info>


<item>
            <title>[SERVER-74747] Deprecate `numInitialChunks` parameter of `shardCollection` command</title>
                <link>https://jira.mongodb.org/browse/SERVER-74747</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;numInitialChunks&lt;/tt&gt; parameter can be used to spread chunks across shards when sharding an empty collection with hashed shard key. Considering that the auto splitter gone away and that the number of chunks does not matter anymore, this option has no real value anymore.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2285727">SERVER-74747</key>
            <summary>Deprecate `numInitialChunks` parameter of `shardCollection` command</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="robert.sander@mongodb.com">Robert Sander</assignee>
                                    <reporter username="pierlauro.sciarelli@mongodb.com">Pierlauro Sciarelli</reporter>
                        <labels>
                            <label>car-qw</label>
                            <label>nomas-1-cleanup</label>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Fri, 10 Mar 2023 15:15:22 +0000</created>
                <updated>Fri, 19 Jan 2024 08:11:27 +0000</updated>
                            <resolved>Tue, 7 Nov 2023 10:27:58 +0000</resolved>
                                                    <fixVersion>7.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="5859887" author="xgen-internal-githook" created="Tue, 7 Nov 2023 10:07:15 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Robert Sander&apos;, &apos;email&apos;: &apos;robert.sander@mongodb.com&apos;, &apos;username&apos;: &apos;robsndr&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-74747&quot; title=&quot;Deprecate `numInitialChunks` parameter of `shardCollection` command&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74747&quot;&gt;&lt;del&gt;SERVER-74747&lt;/del&gt;&lt;/a&gt; Deprecate numIntialChunks parameter for ShardCollection&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cbbe4fe36cb6367424bac0fecc803342b1c1c9ec&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cbbe4fe36cb6367424bac0fecc803342b1c1c9ec&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5576193" author="JIRAUSER1274093" created="Wed, 19 Jul 2023 09:22:13 +0000"  >&lt;p&gt;Several tests are affected by this change, since &lt;tt&gt;numInitialChunks&#160;&lt;/tt&gt; should no longer be used. Most of them should be deleted or adapted to the default behaviour. At the time of writing, this is 2 chunks per shard, but there&apos;s another ticket that aims to change the behaviour for sharding an empty collection with hashed shard key to 1 chunk per shard.&#160;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://spruce.mongodb.com/version/64ad30b761837df5f0ce588a/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Evergreen patch&lt;/a&gt; with the changes about the parameter and the affected tests. The tests changes should be revised once the default behaviour becomes one chunk per shard.&lt;/p&gt;</comment>
                            <comment id="5559583" author="JIRAUSER1259062" created="Wed, 12 Jul 2023 08:43:51 +0000"  >&lt;p&gt;After an internal discussion with the product manager, we decided that the best approach is to get rid of this argument starting from version 7.1. The &lt;tt&gt;shardCollection&lt;/tt&gt; command silently ignores unknown options, implying that the &lt;tt&gt;numInitialChunks&lt;/tt&gt; argument will fall into this category. As a consequence, any exiting scripts used by clients will continue to work (no syntax error).&lt;/p&gt;</comment>
                            <comment id="5511667" author="JIRAUSER1259062" created="Tue, 20 Jun 2023 13:09:33 +0000"  >&lt;p&gt;The &lt;tt&gt;numInitialChunks&lt;/tt&gt; parameter of &lt;tt&gt;shardCollection&lt;/tt&gt; command has been deprecated by logging a warning message. Out of the scope of this ticket, we should consider to do the same for the&#160;&lt;tt&gt;reshardCollection&lt;/tt&gt; command and, in a subsequent major version, to get rid of this parameter from all the involved commands. Obviously, this also implies a public documentation changes.&lt;/p&gt;</comment>
                    </comments>
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                    <name>Depends</name>
                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="2486306">SERVER-82611</issuekey>
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                            <issuelinktype id="10320">
                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
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            <issuekey id="2492460">DOCS-16479</issuekey>
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                            <issuelinktype id="10520">
                    <name>Problem/Incident</name>
                                            <outwardlinks description="causes">
                                        <issuelink>
            <issuekey id="2495271">SERVER-83005</issuekey>
        </issuelink>
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                                                        </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="2495279">SERVER-83006</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2320797">SERVER-76405</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2460578">SERVER-81884</issuekey>
        </issuelink>
                            </inwardlinks>
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