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 q46JP41G033651 for ; Sun, 6 May 2012 14:25:05 -0500 Received: from mail.profihost.ag (mail.profihost.ag [85.158.179.208]) by cuda.sgi.com with ESMTP id 8iagDQ3nCEjhknBe (version=TLSv1 cipher=AES256-SHA bits=256 verify=NO) for ; Sun, 06 May 2012 12:25:02 -0700 (PDT) Message-ID: <4FA6D016.6010702@profihost.ag> Date: Sun, 06 May 2012 21:25:10 +0200 From: Stefan Priebe 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> <4FA69CB0.8000008@hardwarefreak.com> In-Reply-To: <4FA69CB0.8000008@hardwarefreak.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: stan@hardwarefreak.com Cc: xfs@oss.sgi.com Am 06.05.2012 17:45, schrieb Stan Hoeppner: > 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. > Thanks Stan that's it. After deleting 200GB-300GB it's running fine again. What is the general recommandation of free space? Greets Stefan _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs