From mboxrd@z Thu Jan 1 00:00:00 1970 From: Josh Durgin Subject: Re: improve speed with auth supported=none Date: Tue, 13 Nov 2012 00:04:49 -0800 Message-ID: <50A1FF21.2020700@inktank.com> References: <50A117B9.4060804@profihost.ag> <50A170BF.5030402@profihost.ag> <50A1F9F8.4030808@inktank.com> <50A1FC4D.8010000@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-pa0-f46.google.com ([209.85.220.46]:43633 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754239Ab2KMIEw (ORCPT ); Tue, 13 Nov 2012 03:04:52 -0500 Received: by mail-pa0-f46.google.com with SMTP id hz1so4878734pad.19 for ; Tue, 13 Nov 2012 00:04:52 -0800 (PST) In-Reply-To: <50A1FC4D.8010000@profihost.ag> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Stefan Priebe Cc: =?ISO-8859-1?Q?S=E9bastien_Han?= , "ceph-devel@vger.kernel.org" , Alexandre DERUMIER On 11/12/2012 11:52 PM, Stefan Priebe wrote: > Am 13.11.2012 08:42, schrieb Josh Durgin: >> On 11/12/2012 01:57 PM, Stefan Priebe wrote: >>> Thanks, >>> >>> this gives another burst for iops. I'm now at 23.000 iops ;-) So for >>> random 4k iops ceph auth and especially the logging is a lot of >>> overhead. >> >> How much difference did disabling auth make vs only disabling logging? > > disable debug logging: 3000 iops > disable auth logging: 2000 iops > > Is anybody in the ceph team also interested in a call graph of kvm when > VM is doing random 4k write io? I'm interested, although I'm not sure how easy it'll be to find bottlenecks from it. It's worth a shot.