openstack team mailing list archive

[Melanie Witt <melwitt@xxxxxxxxxxxxx>]

This presentation from the summit might be of interest to you:

http://www.openstack.org/summit/portland-2013/session-videos/presentation/scaling-the-boot-barrier-identifying-and-eliminating-contention-in-openstack

I couldn't find just the slide deck anywhere so far.

Your issue is different being that you're seeing 30 minute launch time, that's extreme, but this 
info might help you get a high level picture of the flow.

Melanie

On 4/30/13 11:42 AM, Steve Heistand wrote:
> if I launch one vm at a time its doesnt very long to start up the instance. maybe a minute.
> if I launch 4 instances (of the same snapshot as before) it takes 30 minutes.
>
> they are all launching to different compute nodes, the controllers are all multicore,
> I dont see any processes on the compute nodes taking much cpu power, the controller has
> a keystone process mostly sucking up 1 core, loads and loads of beam.smp from rabbitmq but
> none are really taking any cpu time.
>
> the glance image storage is on the controller node, the snapshots are 2-3G in size.
>
> where should I start looking to find out why things are so slow?
>
> thanks
>
> s
>
>
>
> _______________________________________________
> Mailing list: https://launchpad.net/~openstack
> Post to     : openstack@xxxxxxxxxxxxxxxxxxx
> Unsubscribe : https://launchpad.net/~openstack
> More help   : https://help.launchpad.net/ListHelp