From: Stefan Priebe <s.priebe@profihost.ag>
To: Mark Nelson <mark.nelson@inktank.com>
Cc: "ceph-devel@vger.kernel.org" <ceph-devel@vger.kernel.org>
Subject: Re: OSD Hardware questions
Date: Wed, 27 Jun 2012 17:13:20 +0200 [thread overview]
Message-ID: <4FEB2310.9080801@profihost.ag> (raw)
In-Reply-To: <4FEB10DA.7010206@inktank.com>
Hi Mark,
> Am 27.06.2012 15:55, schrieb Mark Nelson:
> On 6/27/12 8:04 AM, Stefan Priebe - Profihost AG wrote:
> Hi Stefan,
>
> I'm not entirely clear how you are coming to the conclusion regarding
> the CPU requirements. If we go by the "1Ghz per OSD" suggestion, does
> that mean you plan to have 3.6GHz*20/1GHz = 72 OSDs per server?
oh i'm sorry it seems you got me wrong. I've a testsetup 4x OSDs with
one disk each in ONE Server with a Intel Xeon 3,6Ghz. Each of the 4
ceph-osd processes take up to 170% CPU usage right now. So with these 4
osd disks and daemons i go up to 800% load. So EACH osd process takes up
to 2 cores of 3,6 Ghz.
So i need right now 2 Core of 3,6Ghz each per OSD drive. So if i want to
use 8-10 drives per osd server i need 20 cores of 3,6Ghz.
Anything wrong?
Greets
Stefan
next prev parent reply other threads:[~2012-06-27 15:13 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 [this message]
[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
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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