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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks for the hint. Is there documentation on how to run keystone using apache and multiple processes?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’m pretty raw with python, ruby, apache …
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thx.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Chmouel Boudjnah [mailto:chmouel@enovance.com]
<br>
<b>Sent:</b> Tuesday, July 09, 2013 8:22 AM<br>
<b>To:</b> OpenStack Development Mailing List<br>
<b>Subject:</b> Re: [openstack-dev] Swift debugging / performance - large latencies seen.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">On Tue, Jul 9, 2013 at 2:40 PM, Snider, Tim <<a href="mailto:Tim.Snider@netapp.com" target="_blank">Tim.Snider@netapp.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I have 2 openstack clusters running the Folsom release with multiple Swift nodes. I also have a small setup that is running only Swift with a single node. I’m noticing very large
Swift I/O latencies (seconds long) on the openstack clusters – ssbench output snippet is below. Performance is approximately identical on the openstack clusters. The Swift only cluster performs much better.
<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
Keystone performance can be pretty awful unless you are using something else than the default WSGI container configuration (single process eventlet I think). I would suggest you try to run it under apache with multiple process.<br>
<br>
See the dicussion at last summit about Keystone performance here :<br>
<br>
<a href="https://etherpad.openstack.org/havana-keystone-performance">https://etherpad.openstack.org/havana-keystone-performance</a><br>
<br>
Chmouel.<o:p></o:p></p>
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