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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-7423] Support commands for read preference</title>
                <link>https://jira.mongodb.org/browse/SERVER-7423</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The driver&apos;s generic command() or runCommand() API should accept a read preference, and obey the preference for these commands:&lt;/p&gt;

&lt;p&gt;group&lt;br/&gt;
inline mapreduce&lt;br/&gt;
aggregate&lt;br/&gt;
collStats, dbStats&lt;br/&gt;
count, distinct&lt;br/&gt;
geoNear, geoSearch, geoWalk&lt;br/&gt;
For these exceptional commands, the driver or mongos obeys the read preference the same as for queries. Otherwise, all commands are run on the primary.&lt;/p&gt;

&lt;p&gt;Note: In the future we&apos;ll need to add a field to commands in listCommands to distinguish new commands that should obey the read preference. The slaveOk field alone doesn&apos;t cover this: e.g., reindex has slaveOk true, but we&apos;ve decided that reindex with a read preference of SECONDARY should not reindex a random secondary, it should be run on the primary.&lt;/p&gt;</description>
                <environment></environment>
        <key id="53686">SERVER-7423</key>
            <summary>Support commands for read preference</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="9">Done</resolution>
                                        <assignee username="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                    </labels>
                <created>Fri, 19 Oct 2012 13:27:26 +0000</created>
                <updated>Mon, 11 Jul 2016 17:56:08 +0000</updated>
                            <resolved>Mon, 19 Nov 2012 23:27:32 +0000</resolved>
                                    <version>2.1.1</version>
                                    <fixVersion>2.3.1</fixVersion>
                                    <component>Internal Client</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="246807" author="auto" created="Tue, 22 Jan 2013 19:11:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-01-22T19:02:27Z&apos;, u&apos;email&apos;: u&apos;jesse@10gen.com&apos;, u&apos;name&apos;: u&apos;A. Jesse Jiryu Davis&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7423&quot; title=&quot;Support commands for read preference&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7423&quot;&gt;&lt;del&gt;SERVER-7423&lt;/del&gt;&lt;/a&gt; more thorough testing of commands and read preferences on mongos&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ffb455ab773816ba576099886192d3f379d4b1ae&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ffb455ab773816ba576099886192d3f379d4b1ae&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="194870" author="auto" created="Tue, 20 Nov 2012 16:30:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-11-20T16:04:20Z&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7423&quot; title=&quot;Support commands for read preference&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7423&quot;&gt;&lt;del&gt;SERVER-7423&lt;/del&gt;&lt;/a&gt; Support commands for read preference&lt;/p&gt;

&lt;p&gt;Made sure that the drop command gets applied on the secondaries first before initializing the profile collections in the test.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7aac243b122f4ac073f81a1f98182d40bc322ffc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7aac243b122f4ac073f81a1f98182d40bc322ffc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="194218" author="auto" created="Mon, 19 Nov 2012 23:16:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-11-05T20:16:56Z&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7423&quot; title=&quot;Support commands for read preference&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7423&quot;&gt;&lt;del&gt;SERVER-7423&lt;/del&gt;&lt;/a&gt; Support commands for read preference&lt;/p&gt;

&lt;p&gt;Step#2 Added mongos support.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6bdaca981be459757d6d93b5cc34724ff89359c6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6bdaca981be459757d6d93b5cc34724ff89359c6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="181093" author="auto" created="Wed, 31 Oct 2012 18:31:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-10-16T19:21:17-07:00&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7423&quot; title=&quot;Support commands for read preference&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7423&quot;&gt;&lt;del&gt;SERVER-7423&lt;/del&gt;&lt;/a&gt; Support commands for read preference&lt;/p&gt;

&lt;p&gt;Step#1 Add shell helper&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/44e2a3167adb48e9055639bbd9d94bd9c4d4460b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/44e2a3167adb48e9055639bbd9d94bd9c4d4460b&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="58609">SERVER-7868</issuekey>
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            <issuelink>
            <issuekey id="58681">SERVER-7876</issuekey>
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                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="57904">DOCS-826</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="26328">SERVER-4464</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="276015">SERVER-23427</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="35585">SERVER-5525</issuekey>
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