From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Nelson Subject: Re: poor OSD performance using kernel 3.4 Date: Wed, 30 May 2012 09:56:43 -0500 Message-ID: <4FC6352B.8050501@inktank.com> References: <4FBE415E.8030702@profihost.ag> <4FC54CDB.1000506@inktank.com> <4FC5BF27.5060704@profihost.ag> <4FC5C941.6010105@profihost.ag> <4FC5FEC1.90103@profihost.ag> <4FC60FC8.207@inktank.com> <4FC61596.3050703@profihost.ag> <4FC61E69.2030408@profihost.ag> <4FC63381.6090300@inktank.com> <4FC63454.3070007@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-ob0-f174.google.com ([209.85.214.174]:63782 "EHLO mail-ob0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754298Ab2E3O4s (ORCPT ); Wed, 30 May 2012 10:56:48 -0400 Received: by obbtb18 with SMTP id tb18so8501641obb.19 for ; Wed, 30 May 2012 07:56:48 -0700 (PDT) In-Reply-To: <4FC63454.3070007@profihost.ag> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Stefan Priebe Cc: Stefan Majer , "ceph-devel@vger.kernel.org" On 05/30/2012 09:53 AM, Stefan Priebe wrote: > Am 30.05.2012 16:49, schrieb Mark Nelson: >> On 05/30/2012 08:38 AM, Stefan Majer wrote: >>> No i dont think so either, this was just a example. Maybe it is totaly >>> different. >> >> You could try setting up a pool with a replication level of 1 and see >> how that does. It will be faster in any event, but it would be >> interesting to see how much faster. > is there an easier way than modifying the crush map? > > PS: i also tested noop scheduler - same result. > > Stefan something like: ceph osd pool create POOL [pg_num [pgp_num]] then: ceph osd pool set POOL size VALUE Mark