Re: cloud disk benchmarks

2012-10-08 Thread Seth Vidal
On Sun, 7 Oct 2012, David Nalley wrote: Gluster currently doesn't proclaim running VM images as one of its strong points, although many do use it in that capacity. A few months back a well funded group attempted to use Gluster as storage for their CloudStack instance and were unable to tune

Re: cloud disk benchmarks

2012-10-08 Thread Seth Vidal
On Sun, 7 Oct 2012, Robyn Bergeron wrote: - AIUI gluster can be less than optimal for lots of small writes - esp. when doing replication - I don't know if you have looked at all of the translators, there are a few performance/write translators that can help improve this. Indeed - we're usi

Re: Fedora/Infra/Gluster halp? Fwd: cloud disk benchmarks

2012-10-08 Thread Seth Vidal
On Mon, 8 Oct 2012, Jeff Darcy wrote: http://skvidal.fedorapeople.org/misc/cloudbench.txt Two things jump out at me from these results. First is that using GlusterFS replication for ephemeral storage seems . . . strange. Is there some reason that the OpenStack setup can't use local storage

Re: cloud disk benchmarks

2012-10-07 Thread David Nalley
On Sat, Oct 6, 2012 at 5:26 PM, Seth Vidal wrote: > When running a ftbfs run on both euca and openstack I started to see some > pretty big differences in performance. CPU and mem were all the same or > close enough so I decided to look at disk performance. > > euca is backed by local disks in a ra

Re: cloud disk benchmarks

2012-10-07 Thread Robyn Bergeron
On 10/06/2012 02:26 PM, Seth Vidal wrote: When running a ftbfs run on both euca and openstack I started to see some pretty big differences in performance. CPU and mem were all the same or close enough so I decided to look at disk performance. euca is backed by local disks in a raid/lvm layout

Re: cloud disk benchmarks

2012-10-06 Thread Matthew Miller
On Sat, Oct 06, 2012 at 05:26:00PM -0400, Seth Vidal wrote: > openstack is using a replicated/distributed gluster for all disk > back ends - including ephemeral (local) and volume-backed (iscsi) > Results are here and are kinda staggering: > http://skvidal.fedorapeople.org/misc/cloudbench.txt We s

cloud disk benchmarks

2012-10-06 Thread Seth Vidal
When running a ftbfs run on both euca and openstack I started to see some pretty big differences in performance. CPU and mem were all the same or close enough so I decided to look at disk performance. euca is backed by local disks in a raid/lvm layout and/or exported via iscsi through the Stor