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From: Stefan Priebe <s.priebe@profihost.ag>
To: Sage Weil <sage@inktank.com>
Cc: Alexandre DERUMIER <aderumier@odiso.com>,
	Mark Nelson <mark.nelson@inktank.com>,
	Gregory Farnum <greg@inktank.com>,
	ceph-devel@vger.kernel.org
Subject: Re: OSD Hardware questions
Date: Thu, 28 Jun 2012 23:25:36 +0200	[thread overview]
Message-ID: <4FECCBD0.3030909@profihost.ag> (raw)
In-Reply-To: <Pine.LNX.4.64.1206280831590.32016@cobra.newdream.net>

Am 28.06.2012 17:33, schrieb Sage Weil:
> Have you tried adjusting 'osd op threads'?  The default is 2, but bumping
> that to, say, 8, might give you better concurrency and throughput.
For me this doesn't change anything. I believe the ceph-osd processes 
are the problem. I mean i've 8 cores x 3,6Ghz and 4 ceph-osd processses 
use around 80%.

> "Mark Nelson" <mark.nelson@inktank.com> wrote:
>> It would be interesting to see where all your CPU time is being spent.
>> What benchmark are you using to do the random writes?
>
> Definitely.  Seeing perf/oprofile/whatever results for the osd under that
> workload would be very interesting!  We need to get perf going in our
> testing environment...
I have it working. But even a call graph of 10s is around 120 000 lines 
long ?!

Stefan

  parent reply	other threads:[~2012-06-28 21:25 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-27 13:04 OSD Hardware questions Stefan Priebe - Profihost AG
2012-06-27 13:55 ` Mark Nelson
2012-06-27 14:55   ` Jim Schutt
2012-06-27 15:19     ` Stefan Priebe
2012-06-27 17:23       ` Jim Schutt
2012-06-27 17:54         ` Stefan Priebe
2012-06-27 18:38           ` Jim Schutt
2012-06-27 18:48             ` Stefan Priebe
2012-06-27 19:10               ` Jim Schutt
2012-06-27 19:14                 ` Jim Schutt
2012-06-27 15:53     ` Mark Nelson
2012-06-27 17:59       ` Jim Schutt
2012-06-27 15:13   ` Stefan Priebe
     [not found]     ` <CAPYLRzj916kW=KLy3dMTVPJRoNtPMP_Ejz+YAxRUJ5jZc+HeMg@mail.gmail.com>
2012-06-27 15:28       ` Stefan Priebe
2012-06-27 16:00         ` Mark Nelson
2012-06-28 13:21           ` Stefan Priebe - Profihost AG
2012-06-28 14:38             ` Mark Nelson
2012-06-28 15:18               ` Alexandre DERUMIER
2012-06-28 15:33                 ` Sage Weil
2012-06-28 15:45                   ` Alexandre DERUMIER
2012-06-28 15:48                     ` Jim Schutt
2012-06-28 21:25                   ` Stefan Priebe [this message]
2012-06-29 11:37                     ` Mark Nelson
2012-06-29 12:35                       ` Stefan Priebe - Profihost AG
2012-06-28 16:01                 ` Stefan Priebe
2012-06-28 16:00               ` Stefan Priebe

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