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

Chmouel Boudjnah chmouel at enovance.com
Tue Jul 9 13:21:54 UTC 2013

On Tue, Jul 9, 2013 at 2:40 PM, Snider, Tim <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

See the dicussion at last summit about Keystone performance here :


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