From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id q46Fjr3c256522 for ; Sun, 6 May 2012 10:45:53 -0500 Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id 3blCj0ZJll34Ev9K for ; Sun, 06 May 2012 08:45:52 -0700 (PDT) Message-ID: <4FA69CB0.8000008@hardwarefreak.com> Date: Sun, 06 May 2012 10:45:52 -0500 From: Stan Hoeppner MIME-Version: 1.0 Subject: Re: suddenly slow writes on XFS Filesystem References: <4FA63DDA.9070707@profihost.ag> (sfid-20120506_121127_622020_FC89E0F4) <201205061233.58496.Martin@lichtvoll.de> In-Reply-To: <201205061233.58496.Martin@lichtvoll.de> Reply-To: stan@hardwarefreak.com List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Martin Steigerwald Cc: Stefan Priebe , xfs@oss.sgi.com On 5/6/2012 5:33 AM, Martin Steigerwald wrote: > Am Sonntag, 6. Mai 2012 schrieb Stefan Priebe: >> It is a raid 10 of 20 SATA Disks and i can only write to them with >> about 700kb/s while doing random i/o. I tried vanilla Kernel 3.0.30 >> and 3.3.4 - no difference. Writing to another partition on another xfs >> array works fine. > > Additionally what RAID is this? SoftRAID or some - which one? - hardware > RAID controller? And what disks are used, whats the rpm of these? I doubt much of this stuff matters. Stefan's filesystem is 96% full, w/~200GB free. This free space is likely heavily fragmented. If he's doing allocation in this fragmented free space I'd think that would fully explain his write performance dropping off a cliff due to massive head seeking. -- Stan _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs