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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-11573] Advise caution when geographically distributing config servers across two datacenters.</title>
                <link>https://jira.mongodb.org/browse/DOCS-11573</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h3&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h3&gt;
&lt;p&gt;In &lt;a href=&quot;https://docs.mongodb.com/manual/tutorial/deploy-geographically-distributed-replica-set/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&quot;Deploy a Geographically Redundant Replica Set&quot;&lt;/a&gt;, the following advice appears:&lt;/p&gt;

&lt;blockquote&gt;
&lt;h4&gt;&lt;a name=&quot;DeployaGeographicallyRedundantThreeMemberReplicaSet&quot;&gt;&lt;/a&gt;Deploy a Geographically Redundant Three-Member Replica Set&lt;/h4&gt;
&lt;p&gt;For a geographically redundant three-member replica set deployment, you must decide how to distribute your system. Some possible distributions for the three members are:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Across Three Data Centers: One members to each site.&lt;/li&gt;
	&lt;li&gt;Across Two Data Centers: Two members to Site A and one member to Site B. If one of the members of the replica set is an arbiter, distribute the arbiter to Site A with a data-bearing member.&lt;/li&gt;
&lt;/ul&gt;
&lt;/blockquote&gt;

&lt;p&gt;While these are both valid configurations, the documentation should perhaps mention (here) that the three-site solution has several advantages over the two-shard solution, especially for CSRS config servers.  &lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;Scope%28pagestoreview%29%3A&quot;&gt;&lt;/a&gt;Scope (pages to review):&lt;/h3&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;&lt;a href=&quot;https://docs.mongodb.com/manual/tutorial/deploy-geographically-distributed-replica-set/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/tutorial/deploy-geographically-distributed-replica-set/&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;https://docs.mongodb.com/manual/core/replica-set-architecture-geographically-distributed/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/core/replica-set-architecture-geographically-distributed/&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;https://docs.mongodb.com/manual/core/replica-set-architectures/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/manual/core/replica-set-architectures/&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;production notes&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="524797">DOCS-11573</key>
            <summary>Advise caution when geographically distributing config servers across two datacenters.</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="mark.brinsmead@mongodb.com">Mark Brinsmead</reporter>
                        <labels>
                    </labels>
                <created>Tue, 10 Apr 2018 17:19:09 +0000</created>
                <updated>Mon, 30 Oct 2023 19:35:04 +0000</updated>
                            <resolved>Thu, 12 Apr 2018 19:41:21 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1868819" author="xgen-internal-githook" created="Thu, 19 Apr 2018 14:47:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;, &apos;name&apos;: &apos;kay&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11573&quot; title=&quot;Advise caution when geographically distributing config servers across two datacenters.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11573&quot;&gt;&lt;del&gt;DOCS-11573&lt;/del&gt;&lt;/a&gt;: additional tweaks to csrs/rs data centers&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/40d0563e6e2b776821bcd6f35be03763470a747f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/40d0563e6e2b776821bcd6f35be03763470a747f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1868817" author="xgen-internal-githook" created="Thu, 19 Apr 2018 14:46:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;, &apos;name&apos;: &apos;kay&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11573&quot; title=&quot;Advise caution when geographically distributing config servers across two datacenters.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11573&quot;&gt;&lt;del&gt;DOCS-11573&lt;/del&gt;&lt;/a&gt;: additional tweaks to csrs/rs data centers&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/c660cf7db1bb681b70fabe1e4b194fb02c1efa05&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/c660cf7db1bb681b70fabe1e4b194fb02c1efa05&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1865355" author="xgen-internal-githook" created="Mon, 16 Apr 2018 16:54:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;kay&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11573&quot; title=&quot;Advise caution when geographically distributing config servers across two datacenters.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11573&quot;&gt;&lt;del&gt;DOCS-11573&lt;/del&gt;&lt;/a&gt;: rs/data centers + csrs especially&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/8d74a9f0a7158de3691b49b4306ebaf880862b9d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/8d74a9f0a7158de3691b49b4306ebaf880862b9d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1865354" author="xgen-internal-githook" created="Mon, 16 Apr 2018 16:54:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;kay&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11573&quot; title=&quot;Advise caution when geographically distributing config servers across two datacenters.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11573&quot;&gt;&lt;del&gt;DOCS-11573&lt;/del&gt;&lt;/a&gt;: csrs data center&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/7ad3eb0e693f12d4bdcc3b88257bc65001a79a7e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/7ad3eb0e693f12d4bdcc3b88257bc65001a79a7e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1865346" author="xgen-internal-githook" created="Mon, 16 Apr 2018 16:49:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;kay&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11573&quot; title=&quot;Advise caution when geographically distributing config servers across two datacenters.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11573&quot;&gt;&lt;del&gt;DOCS-11573&lt;/del&gt;&lt;/a&gt;: rs/data centers + csrs especially&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/282b2b01c01d91f6b144bfb3988924fe2f0938a8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/282b2b01c01d91f6b144bfb3988924fe2f0938a8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1865342" author="xgen-internal-githook" created="Mon, 16 Apr 2018 16:48:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;kay&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11573&quot; title=&quot;Advise caution when geographically distributing config servers across two datacenters.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11573&quot;&gt;&lt;del&gt;DOCS-11573&lt;/del&gt;&lt;/a&gt;: rs/data centers + csrs especially&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/5f919728eed074eefcd8db37fb2cd73f09226d06&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/5f919728eed074eefcd8db37fb2cd73f09226d06&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1862828" author="xgen-internal-githook" created="Thu, 12 Apr 2018 18:48:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;name&apos;: &apos;kay&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11573&quot; title=&quot;Advise caution when geographically distributing config servers across two datacenters.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11573&quot;&gt;&lt;del&gt;DOCS-11573&lt;/del&gt;&lt;/a&gt;: csrs data center&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/efa833eb6d40476cf87fe8e4b4f4391ce743d955&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/efa833eb6d40476cf87fe8e4b4f4391ce743d955&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1862821" author="xgen-internal-githook" created="Thu, 12 Apr 2018 18:47:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;name&apos;: &apos;kay&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11573&quot; title=&quot;Advise caution when geographically distributing config servers across two datacenters.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11573&quot;&gt;&lt;del&gt;DOCS-11573&lt;/del&gt;&lt;/a&gt;: csrs data center&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/d205684abc414cd3740ef56366c3b93a4b097b95&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/d205684abc414cd3740ef56366c3b93a4b097b95&lt;/a&gt;&lt;/p&gt;</comment>
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