Am 08.11.2012 14:19, schrieb Mark Nelson:
On 11/08/2012 02:45 AM, Stefan Priebe - Profihost AG wrote:
Am 08.11.2012 01:59, schrieb Mark Nelson:
There's also the context switching overhead. It'd be interesting to
know how much the writer processes were shifting around on cores.
What do you mean by that? I'm talking about the KVM guest not about the
ceph nodes.
in this case, is fio bouncing around between cores?
Thanks you're correct. If i bind fio to two cores on a 8 core VM it runs
with 16.000 iops.
So it is a problem of KVM which let's the processes jump between cores a
lot.
Greets,
Stefan
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
