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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>[DOCS-2330] Our distributed replicaset recommendation in docs don&apos;t match w/ support</title>
                <link>https://jira.mongodb.org/browse/DOCS-2330</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;When a user asks about setting up geographically diverse replicasets, we recommend using an odd number of data centers so that they can keep a majority live even after one fails.  Obviously, for some customers that&apos;s not an option, but for 99% of them, sticking an arbiter up in the cloud is actually feasible and is the best answer to their problems.&lt;/p&gt;

&lt;p&gt;Our docs, however, recommend putting a majority of nodes in a single location, thereby guaranteeing that if that location goes offline, that their replicaset will be read-only (or if it&apos;s a sharded environment, completely unusable).  Mentioning that as an option for users who absolutely, positively can&apos;t have a 3rd location is fine, but it shouldn&apos;t be the default recommendation.&lt;/p&gt;

&lt;p&gt;Doc is here:&lt;br/&gt;
&lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/deploy-geographically-distributed-replica-set/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/tutorial/deploy-geographically-distributed-replica-set/&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Nicholas&lt;/p&gt;</description>
                <environment></environment>
        <key id="100716">DOCS-2330</key>
            <summary>Our distributed replicaset recommendation in docs don&apos;t match w/ support</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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="nicholas.tang@mongodb.com">Nicholas Tang</reporter>
                        <labels>
                    </labels>
                <created>Mon, 2 Dec 2013 17:04:31 +0000</created>
                <updated>Mon, 30 Oct 2023 21:52:10 +0000</updated>
                            <resolved>Thu, 7 Apr 2016 04:53:18 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>2</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1229754" author="xgen-internal-githook" created="Thu, 7 Apr 2016 22:50:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2330&quot; title=&quot;Our distributed replicaset recommendation in docs don&amp;#39;t match w/ support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2330&quot;&gt;&lt;del&gt;DOCS-2330&lt;/del&gt;&lt;/a&gt; tweaks to distributed replica set&lt;br/&gt;
Branch: v2.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/cd25d7436e08252501b16aaf1d434f5ddc74c838&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/cd25d7436e08252501b16aaf1d434f5ddc74c838&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1229742" author="xgen-internal-githook" created="Thu, 7 Apr 2016 22:40:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2330&quot; title=&quot;Our distributed replicaset recommendation in docs don&amp;#39;t match w/ support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2330&quot;&gt;&lt;del&gt;DOCS-2330&lt;/del&gt;&lt;/a&gt; tweaks to distributed repl set&lt;br/&gt;
Branch: v2.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/f47a9aab69b9469a0f4e8914a189694f1dd2ab8d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/f47a9aab69b9469a0f4e8914a189694f1dd2ab8d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1229738" author="xgen-internal-githook" created="Thu, 7 Apr 2016 22:34:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2330&quot; title=&quot;Our distributed replicaset recommendation in docs don&amp;#39;t match w/ support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2330&quot;&gt;&lt;del&gt;DOCS-2330&lt;/del&gt;&lt;/a&gt; tweaks to distributed repl set&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/8cbb1ff97c10e08db4e75cfe1788c9f91ab656ed&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/8cbb1ff97c10e08db4e75cfe1788c9f91ab656ed&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1229719" author="xgen-internal-githook" created="Thu, 7 Apr 2016 22:05:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2330&quot; title=&quot;Our distributed replicaset recommendation in docs don&amp;#39;t match w/ support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2330&quot;&gt;&lt;del&gt;DOCS-2330&lt;/del&gt;&lt;/a&gt; tweaks to distributed repl set&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/09c6180ed8249bfd757969459165fc7c5b582af6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/09c6180ed8249bfd757969459165fc7c5b582af6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1228598" author="xgen-internal-githook" created="Thu, 7 Apr 2016 04:52:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2330&quot; title=&quot;Our distributed replicaset recommendation in docs don&amp;#39;t match w/ support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2330&quot;&gt;&lt;del&gt;DOCS-2330&lt;/del&gt;&lt;/a&gt; distribute replica set&lt;br/&gt;
Branch: v2.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/29c16ae0b0b74fed4478dc00449ce362c2f246f5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/29c16ae0b0b74fed4478dc00449ce362c2f246f5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1228580" author="xgen-internal-githook" created="Thu, 7 Apr 2016 04:19:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2330&quot; title=&quot;Our distributed replicaset recommendation in docs don&amp;#39;t match w/ support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2330&quot;&gt;&lt;del&gt;DOCS-2330&lt;/del&gt;&lt;/a&gt; distribute replica set&lt;br/&gt;
Branch: v2.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/4a340c5d7f916591c8647d53709b070d9340fd18&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/4a340c5d7f916591c8647d53709b070d9340fd18&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1228552" author="xgen-internal-githook" created="Thu, 7 Apr 2016 03:24:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2330&quot; title=&quot;Our distributed replicaset recommendation in docs don&amp;#39;t match w/ support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2330&quot;&gt;&lt;del&gt;DOCS-2330&lt;/del&gt;&lt;/a&gt; distribute replica set&lt;br/&gt;
Branch: v2.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/a30622fbcccbfed011a622b8614f39ab528435b2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/a30622fbcccbfed011a622b8614f39ab528435b2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1228487" author="xgen-internal-githook" created="Thu, 7 Apr 2016 00:48:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2330&quot; title=&quot;Our distributed replicaset recommendation in docs don&amp;#39;t match w/ support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2330&quot;&gt;&lt;del&gt;DOCS-2330&lt;/del&gt;&lt;/a&gt; distribute replica set&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/0137207b9a55cddf05ae9aa5bd5085d05fefac77&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/0137207b9a55cddf05ae9aa5bd5085d05fefac77&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1228412" author="xgen-internal-githook" created="Wed, 6 Apr 2016 23:00:40 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2330&quot; title=&quot;Our distributed replicaset recommendation in docs don&amp;#39;t match w/ support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2330&quot;&gt;&lt;del&gt;DOCS-2330&lt;/del&gt;&lt;/a&gt; distribute replica set&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/60eecf96bbf1395e6e8b54a37b91cfdfba6c9fde&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/60eecf96bbf1395e6e8b54a37b91cfdfba6c9fde&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1197634" author="alexander.marquardt" created="Wed, 9 Mar 2016 14:45:29 +0000"  >&lt;p&gt;The above recommendations are not totally consistent with our Whitepaper &lt;a href=&quot;https://www.mongodb.com/collateral/mongodb-multi-data-center-deployments&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.mongodb.com/collateral/mongodb-multi-data-center-deployments&lt;/a&gt;, which gives an example with three data centres that have a 2-2-1 configuration.&lt;/p&gt;</comment>
                            <comment id="1197633" author="damien.gasparina" created="Wed, 9 Mar 2016 14:44:09 +0000"  >&lt;p&gt;You can find the same kind of recommendation on:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;&lt;a href=&quot;https://docs.mongodb.org/manual/core/replica-set-architectures/#keep-a-majority-of-members-in-one-location&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.org/manual/core/replica-set-architectures/#keep-a-majority-of-members-in-one-location&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;https://docs.mongodb.org/manual/core/replica-set-architecture-four-members/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.org/manual/core/replica-set-architecture-four-members/&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;I think it would be best to recommend by default to &lt;b&gt;avoid&lt;/b&gt; keeping a majority in one location. This to spare a single point of failure and to allow automatic failover instead of manual failover in case of a DC/general issue. &lt;/p&gt;

&lt;p&gt;Cheers,&lt;br/&gt;
Damien&lt;/p&gt;</comment>
                    </comments>
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                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="104811">DOCS-2477</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="110018">DOCS-2687</issuekey>
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                            <issuelinktype id="10012">
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                                        <issuelink>
            <issuekey id="157208">DOCS-4011</issuekey>
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