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

Chmouel Boudjnah chmouel at enovance.com
Tue Jul 9 13:51:33 UTC 2013


Hi Tim,

it's the first link on google for "apache keystone" :

http://docs.openstack.org/developer/keystone/apache-httpd.html

 we probably want to move this to openstack-operators@

Chmouel.

On Tue, Jul 9, 2013 at 3:31 PM, Snider, Tim <Tim.Snider at netapp.com> wrote:
> 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 …
>
> Thx.
>
>
>
> 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> 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 :
>
> https://etherpad.openstack.org/havana-keystone-performance
>
> Chmouel.
>
>
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