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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-4944] RAID 0 performance advice may be inaccurate</title>
                <link>https://jira.mongodb.org/browse/DOCS-4944</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;I&apos;m a little bit confused by the RAID section of &lt;a href=&quot;http://docs.mongodb.org/manual/administration/production-notes/#raid&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Production Notes&lt;/a&gt;&lt;br/&gt;
 Here it says&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;Avoid RAID-0 with MongoDB deployments. While RAID-0 provides good write performance, it also provides limited availability and can lead to reduced performance on read operations, particularly when using Amazon&#8217;s EBS volumes.&lt;/p&gt;&lt;/blockquote&gt;
&lt;p&gt;To my understanding usually RAID-0 should work better than single disk, both read and write. Then why does it &lt;b&gt;lead to reduced performance&lt;/b&gt;? Is there any specific reason?&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;Scope&quot;&gt;&lt;/a&gt;Scope&lt;/h2&gt;

&lt;p&gt;Remove the clause from master -&amp;gt; 3.4&lt;/p&gt;</description>
                <environment></environment>
        <key id="188097">DOCS-4944</key>
            <summary>RAID 0 performance advice may be inaccurate</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="ravind.kumar">Ravind Kumar</assignee>
                                    <reporter username="yaoxing.zhang@gmail.com">&#32768;&#26143; &#24352;</reporter>
                        <labels>
                    </labels>
                <created>Mon, 9 Mar 2015 01:23:09 +0000</created>
                <updated>Mon, 30 Oct 2023 21:47:37 +0000</updated>
                            <resolved>Thu, 7 Feb 2019 18:59:14 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                    <component>production</component>
                    <component>Server</component>
                        <due></due>
                            <votes>3</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2141469" author="xgen-internal-githook" created="Thu, 7 Feb 2019 18:57:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rkumar-mongo&apos;, &apos;email&apos;: &apos;ravind.kumar@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-4944&quot; title=&quot;RAID 0 performance advice may be inaccurate&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-4944&quot;&gt;&lt;del&gt;DOCS-4944&lt;/del&gt;&lt;/a&gt;: Remove RAID-0 commentary from production notes&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/304536eb04a13eba1040bd1e2b93671f4035fcf9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/304536eb04a13eba1040bd1e2b93671f4035fcf9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2141455" author="xgen-internal-githook" created="Thu, 7 Feb 2019 18:48:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rkumar-mongo&apos;, &apos;email&apos;: &apos;ravind.kumar@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-4944&quot; title=&quot;RAID 0 performance advice may be inaccurate&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-4944&quot;&gt;&lt;del&gt;DOCS-4944&lt;/del&gt;&lt;/a&gt;: Remove RAID-0 commentary from production notes&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/38f3a37c9331a28e8eb6c58edcc565d7369d1eaf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/38f3a37c9331a28e8eb6c58edcc565d7369d1eaf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2141429" author="xgen-internal-githook" created="Thu, 7 Feb 2019 18:36:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rkumar-mongo&apos;, &apos;email&apos;: &apos;ravind.kumar@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-4944&quot; title=&quot;RAID 0 performance advice may be inaccurate&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-4944&quot;&gt;&lt;del&gt;DOCS-4944&lt;/del&gt;&lt;/a&gt;: Remove RAID-0 commentary from production notes&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/2ce027e8082cf97b7c80c81fdee49a06e77279a6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/2ce027e8082cf97b7c80c81fdee49a06e77279a6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2141391" author="xgen-internal-githook" created="Thu, 7 Feb 2019 18:17:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rkumar-mongo&apos;, &apos;email&apos;: &apos;ravind.kumar@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-4944&quot; title=&quot;RAID 0 performance advice may be inaccurate&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-4944&quot;&gt;&lt;del&gt;DOCS-4944&lt;/del&gt;&lt;/a&gt;: Remove RAID-0 commentary from production notes&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/d752a24e53657b1c3edc103995c3431e1944677c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/d752a24e53657b1c3edc103995c3431e1944677c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2141300" author="xgen-internal-githook" created="Thu, 7 Feb 2019 17:37:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rkumar-mongo&apos;, &apos;email&apos;: &apos;ravind.kumar@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-4944&quot; title=&quot;RAID 0 performance advice may be inaccurate&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-4944&quot;&gt;&lt;del&gt;DOCS-4944&lt;/del&gt;&lt;/a&gt;: Remove RAID-0 commentary from production notes&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/3c59cd0d7b60b95059edc08a08a85b6a085645cb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/3c59cd0d7b60b95059edc08a08a85b6a085645cb&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2141287" author="xgen-internal-githook" created="Thu, 7 Feb 2019 17:26:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;rkumar-mongo&apos;, &apos;email&apos;: &apos;ravind.kumar@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-4944&quot; title=&quot;RAID 0 performance advice may be inaccurate&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-4944&quot;&gt;&lt;del&gt;DOCS-4944&lt;/del&gt;&lt;/a&gt;: Remove RAID-0 commentary from production notes&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/ddbbd2f99a3cf52b843f47c425d25b47ed857888&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/ddbbd2f99a3cf52b843f47c425d25b47ed857888&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2140921" author="ravind.kumar" created="Thu, 7 Feb 2019 14:11:01 +0000"  >&lt;p&gt;I&apos;m going to remove the clause entirely. I am wary about diving into this without more testing and guidance. I don&apos;t mind having more opinionated viewpoints on deployment architectures/strategies, but in absence of testing and consensus, I&apos;m inclined to just scratch it out.&lt;/p&gt;</comment>
                            <comment id="1338105" author="emily.hall" created="Wed, 27 Jul 2016 18:07:09 +0000"  >&lt;p&gt;Closed for housekeeping on 7/27/2016 by Emily Hall. &lt;br/&gt;
If you require additional support, please open a new ticket for prioritization. &lt;br/&gt;
Thanks,&lt;br/&gt;
Emily&lt;/p&gt;</comment>
                            <comment id="845870" author="JIRAUSER1265573" created="Mon, 9 Mar 2015 01:26:27 +0000"  >&lt;p&gt;This is originally from my discussion on &lt;a href=&quot;http://dba.stackexchange.com/questions/94570/mongodb-on-raid0/94669&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;stackexchange&lt;/a&gt;&lt;/p&gt;</comment>
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