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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-3358] sharding - tagging - use for reading from secondaries</title>
                <link>https://jira.mongodb.org/browse/SERVER-3358</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="18951">SERVER-3358</key>
            <summary>sharding - tagging - use for reading from secondaries</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="9">Done</resolution>
                                        <assignee username="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="eliot">Eliot Horowitz</reporter>
                        <labels>
                    </labels>
                <created>Fri, 1 Jul 2011 17:14:52 +0000</created>
                <updated>Wed, 28 Sep 2016 18:36:07 +0000</updated>
                            <resolved>Thu, 5 Jul 2012 18:33:32 +0000</resolved>
                                                    <fixVersion>2.2.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>13</votes>
                                    <watches>12</watches>
                                                                                                                <comments>
                            <comment id="140011" author="renctan" created="Thu, 5 Jul 2012 18:33:16 +0000"  >&lt;p&gt;Code commit:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/commit/83551169374ded2a86838c6b72c8415adb76b1a4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/83551169374ded2a86838c6b72c8415adb76b1a4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="132043" author="renctan" created="Wed, 13 Jun 2012 19:35:52 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4464&quot; title=&quot;drivers and mongos should support 5 read preferences&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4464&quot;&gt;&lt;del&gt;SERVER-4464&lt;/del&gt;&lt;/a&gt; will also implement tagging.&lt;/p&gt;</comment>
                            <comment id="81638" author="kamaradclimber" created="Mon, 23 Jan 2012 15:35:12 +0000"  >&lt;p&gt;This feature is really important for me, we use a mongodb cluster in two datacenters : all 4 masters are in dc A whereas all 4 slaves are in dc B. &lt;br/&gt;
Reads are done from both dcs but it is, for now, impossible to specify &quot;read from the nearest&quot; servers.&lt;/p&gt;

&lt;p&gt;It slows down what we can do with mongodb in production.&lt;br/&gt;
Is there any way to help with this feature ?&lt;/p&gt;</comment>
                            <comment id="61262" author="tuesy" created="Tue, 18 Oct 2011 21:27:47 +0000"  >&lt;p&gt;This is pretty much necessary if you&apos;re running a sharded production environment and you want to segregate your reads from your primary application from other use cases (e.g. async jobs, cron jobs, manual querying, etc.). Would really appreciate it if we bump this up. Thanks!&lt;/p&gt;</comment>
                            <comment id="55672" author="dattas" created="Wed, 21 Sep 2011 16:58:53 +0000"  >&lt;p&gt;This would be great in addition with &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3329&quot; title=&quot;Add more response fields for getLastError with w/wtimeout&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3329&quot;&gt;&lt;del&gt;SERVER-3329&lt;/del&gt;&lt;/a&gt; so you could write to the primary and be able to reliably read from slaves that have the changes.&lt;/p&gt;</comment>
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            <issuekey id="11745">SERVER-992</issuekey>
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