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            <title>[SERVER-3084] What is better practice? 2-3 larger shards, or 20-30 smaller shards?</title>
                <link>https://jira.mongodb.org/browse/SERVER-3084</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We&apos;re trying to understand the best way to grow our Mongo installs.&lt;/p&gt;

&lt;p&gt;Assuming an even distribution shard-key, so that it could shard to N servers effectively, Which would be a better strategy?&lt;/p&gt;

&lt;p&gt;2 physical servers with 32GB each, or 32 physical servers with 2GB each?&lt;/p&gt;

&lt;p&gt;The second scenario would make more CPUs available, and more disk spindles available, but it would mean that data is less likely to be adjacent on the same server, and that more data would require crossing the network.&lt;/p&gt;

&lt;p&gt;Can you advise on which way, in general, is better to proceed?&lt;/p&gt;</description>
                <environment></environment>
        <key id="16924">SERVER-3084</key>
            <summary>What is better practice? 2-3 larger shards, or 20-30 smaller shards?</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="-1">Unassigned</assignee>
                                    <reporter username="savewave">Colin Davis</reporter>
                        <labels>
                    </labels>
                <created>Wed, 11 May 2011 22:40:10 +0000</created>
                <updated>Tue, 12 Jul 2016 00:18:08 +0000</updated>
                            <resolved>Thu, 12 May 2011 04:41:16 +0000</resolved>
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                                                                                                                <comments>
                            <comment id="32221" author="eliot" created="Thu, 12 May 2011 04:41:09 +0000"  >&lt;p&gt;I would agree with @andrew.&lt;br/&gt;
Overall, fewer shards is generally easier to manage.&lt;/p&gt;</comment>
                            <comment id="32162" author="plasma" created="Thu, 12 May 2011 00:39:20 +0000"  >&lt;p&gt;Personally I would pick fewer shards.&lt;/p&gt;

&lt;p&gt;Data locality and touching the least amount of servers as possible are good traits to have when doing queries.&lt;/p&gt;

&lt;p&gt;Maintenance is another thing to worry about when you start to have many servers, so less is better I think if you can get by.&lt;/p&gt;

&lt;p&gt;I&apos;d personally try and start with just one replica set (a single shard), then expand when needed to meet demand.&lt;/p&gt;</comment>
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