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 q47J8IcC131973 for ; Mon, 7 May 2012 14:08:18 -0500 Received: from mail.lichtvoll.de (mondschein.lichtvoll.de [194.150.191.11]) by cuda.sgi.com with ESMTP id fFvhgtcd9rKsjcu2 for ; Mon, 07 May 2012 12:08:16 -0700 (PDT) From: Martin Steigerwald Subject: Re: suddenly slow writes on XFS Filesystem Date: Mon, 7 May 2012 21:08:14 +0200 References: <4FA63DDA.9070707@profihost.ag> <4FA77842.5010703@profihost.ag> <4FA7FA14.6080700@hardwarefreak.com> (sfid-20120507_185142_476909_3A22D91B) In-Reply-To: <4FA7FA14.6080700@hardwarefreak.com> MIME-Version: 1.0 Message-Id: <201205072108.15134.Martin@lichtvoll.de> 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: xfs@oss.sgi.com, stan@hardwarefreak.com Cc: Stefan Priebe - Profihost AG Am Montag, 7. Mai 2012 schrieb Stan Hoeppner: > What I would suggest is doing an xfsdump to a filesystem on another LUN > or machine, expand the size of this LUN by 50% or more (I gather this > is an external RAID), format it appropriately, then xfsrestore. This > will eliminate your current free space fragmentation, and the 50% size > increase will delay the next occurrence of this problem. If you can't > expand the LUN, simply do the xfsdump/format/xfsrestore, which will > give you contiguous free space. Maybe the new dm thin provisioning could help here? But it might just move the fragmentation from the filesystem to the device mapper layer. I did not yet check the implementation details of the new thin provisioning target. -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs