From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe Subject: Re: OSD Hardware questions Date: Wed, 27 Jun 2012 17:28:39 +0200 Message-ID: <4FEB26A7.4070507@profihost.ag> References: <4FEB04CC.4050008@profihost.ag> <4FEB10DA.7010206@inktank.com> <4FEB2310.9080801@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:36451 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757567Ab2F0P2l (ORCPT ); Wed, 27 Jun 2012 11:28:41 -0400 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Gregory Farnum Cc: Mark Nelson , "ceph-devel@vger.kernel.org" > Am 27.06.2012 17:21, schrieb Gregory Farnum: > > > Well, as we said, 1GHz/OSD was a WAG (wild-ass guess), but 3.6GHz+/OSD > is farther outside of that range than I would have expected. It might > just be a consequence of using SSDs, since they can sustain so much more > throughput. Sure it was just so much away from 1Ghz that i wanted to ask. > What is the cluster doing when you see those CPU usage numbers? random write I/O from one KVM. 14k I/Ops with random 4k writes. Stefan