[openstack-dev] Swift debugging / performance - large latencies seen.

Snider, Tim Tim.Snider at netapp.com
Tue Jul 9 13:31:07 UTC 2013

Thanks for the hint. Is there documentation on how to run keystone using apache and multiple processes?
I'm pretty raw with python, ruby, apache ...

From: Chmouel Boudjnah [mailto:chmouel at enovance.com]
Sent: Tuesday, July 09, 2013 8:22 AM
To: OpenStack Development Mailing List
Subject: Re: [openstack-dev] Swift debugging / performance - large latencies seen.

On Tue, Jul 9, 2013 at 2:40 PM, Snider, Tim <Tim.Snider at netapp.com<mailto:Tim.Snider at netapp.com>> wrote:
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.

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.

See the dicussion at last summit about Keystone performance here :


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