<!-- 
RSS generated by JIRA (9.7.1#970001-sha1:2222b88b221c4928ef0de3161136cc90c8356a66) at Thu Feb 08 03:31:40 UTC 2024

It is possible to restrict the fields that are returned in this document by specifying the 'field' parameter in your request.
For example, to request only the issue key and summary append 'field=key&field=summary' to the URL of your request.
-->
<rss version="0.92" >
<channel>
    <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>
    </build-info>


<item>
            <title>[SERVER-13417] mongoperf can overstate performance problems in ext-X filesystems</title>
                <link>https://jira.mongodb.org/browse/SERVER-13417</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;People who use mongoperf to compare XFS and ext-X might get results that overstate the benefits of XFS. The problem is a per-inode mutex that is locked during writes with buffered IO so there won&apos;t be pending writes from pending threads. The mutex contention isn&apos;t as bad for reads but from past experience still hurts concurrent IO performance.&lt;/p&gt;

&lt;p&gt;The workaround is to let mongoperf use multiple files. That would also make the mongoperf load more realistic given mongodb will use many files.&lt;/p&gt;

&lt;p&gt;This is one example &amp;#8211; &lt;a href=&quot;http://edgystuff.tumblr.com/post/81219256714/tips-to-check-and-improve-your-io-performance-for-high&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://edgystuff.tumblr.com/post/81219256714/tips-to-check-and-improve-your-io-performance-for-high&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="128555">SERVER-13417</key>
            <summary>mongoperf can overstate performance problems in ext-X filesystems</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="mdcallag">Mark Callaghan</reporter>
                        <labels>
                    </labels>
                <created>Mon, 31 Mar 2014 16:22:43 +0000</created>
                <updated>Tue, 15 Mar 2016 00:30:01 +0000</updated>
                            <resolved>Tue, 15 Mar 2016 00:30:01 +0000</resolved>
                                                                    <component>Performance</component>
                                        <votes>2</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="1203249" author="ian@10gen.com" created="Tue, 15 Mar 2016 00:30:01 +0000"  >&lt;p&gt;Apologies for the delay in responding on this issue, but we&apos;ve decided not to proceed with any further enhancements to mongoperf in its current form - as such we&apos;re closing this as Won&apos;t Fix.  We aren&apos;t moving the existing code or removing the binary, but any changes going forward would almost certainly involve first moving the existing functionality to a newly written tool.  We made a similar decision with our other tools in 3.0.0 and have been very happy with the results.&lt;/p&gt;

&lt;p&gt;We don&apos;t have a specific timeline for this work, but you can vote on and add yourself as a watcher to &lt;a href=&quot;https://jira.mongodb.org/browse/TOOLS-1103&quot; title=&quot;Mongoperf replacement&quot; class=&quot;issue-link&quot; data-issue-key=&quot;TOOLS-1103&quot;&gt;&lt;del&gt;TOOLS-1103&lt;/del&gt;&lt;/a&gt; to be informed of updates as we weigh its priority against other projects that our Tools team are working on.&lt;/p&gt;</comment>
                            <comment id="530139" author="mdcallag" created="Mon, 31 Mar 2014 23:12:18 +0000"  >&lt;p&gt;More context on this:&lt;br/&gt;
&lt;a href=&quot;https://www.facebook.com/notes/mysql-at-facebook/xfs-ext-and-per-inode-mutexes/10150210901610933&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.facebook.com/notes/mysql-at-facebook/xfs-ext-and-per-inode-mutexes/10150210901610933&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                    </attachments>
                <subtasks>
                    </subtasks>
                <customfields>
                                                <customfield id="customfield_10050" key="com.atlassian.jira.toolkit:comments">
                        <customfieldname># Replies</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>2.0</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                <customfield id="customfield_10055" key="com.atlassian.jira.ext.charting:firstresponsedate">
                        <customfieldname>Date of 1st Reply</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>Tue, 15 Mar 2016 00:30:01 +0000</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10052" key="com.atlassian.jira.toolkit:dayslastcommented">
                        <customfieldname>Days since reply</customfieldname>
                        <customfieldvalues>
                                        7 years, 48 weeks, 2 days ago
    
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_18254" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Dependencies</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue><![CDATA[]]></customfieldvalue>


                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_15850" key="com.atlassian.jira.plugins.jira-development-integration-plugin:devsummary">
                        <customfieldname>Development</customfieldname>
                        <customfieldvalues>
                            
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        <customfield id="customfield_10057" key="com.atlassian.jira.toolkit:lastusercommented">
                        <customfieldname>Last comment by Customer</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>true</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                            <customfield id="customfield_10056" key="com.atlassian.jira.toolkit:lastupdaterorcommenter">
                        <customfieldname>Last commenter</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>ian@mongodb.com</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_11151" key="com.atlassian.jira.toolkit:LastCommentDate">
                        <customfieldname>Last public comment date</customfieldname>
                        <customfieldvalues>
                            7 years, 48 weeks, 2 days ago
                        </customfieldvalues>
                    </customfield>
                                                                                                                        <customfield id="customfield_10000" key="com.atlassian.jira.plugin.system.customfieldtypes:radiobuttons">
                        <customfieldname>Old_Backport</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="10000"><![CDATA[No]]></customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                <customfield id="customfield_10051" key="com.atlassian.jira.toolkit:participants">
                        <customfieldname>Participants</customfieldname>
                        <customfieldvalues>
                                        <customfieldvalue>ian@mongodb.com</customfieldvalue>
            <customfieldvalue>mdcallag</customfieldvalue>
    
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                        <customfield id="customfield_14254" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Product Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1|hrlxrb:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                <customfield id="customfield_12550" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>2|hrxlfb:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10558" key="com.pyxis.greenhopper.jira:gh-global-rank">
                        <customfieldname>Rank (Obsolete)</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>110077</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                            <customfield id="customfield_23361" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Requested By</customfieldname>
                        <customfieldvalues>
                                

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                <customfield id="customfield_10053" key="com.atlassian.jira.ext.charting:timeinstatus">
                        <customfieldname>Time In Status</customfieldname>
                        <customfieldvalues>
                            
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                        <customfield id="customfield_22870" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Triagers</customfieldname>
                        <customfieldvalues>
                                

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                    <customfield id="customfield_14350" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>serverRank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1|hsh0vb:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                    </customfields>
    </item>
</channel>
</rss>