From mboxrd@z Thu Jan 1 00:00:00 1970 From: mru@kth.se (=?iso-8859-1?q?M=E5ns_Rullg=E5rd?=) Subject: Re: Life's too short ...(Raid 1 sync times) Date: Sun, 29 Feb 2004 22:29:59 +0100 Sender: linux-raid-owner@vger.kernel.org Message-ID: References: <40423D29.1050401@sauce.co.nz> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Richard Scobie writes: > I am in the process of benchmarking a 4 x 250GB on 3ware 7506 to try = and > sort out the myriad of options for RAID and XFS, in order to get best > performance for my workload. > > I have tested with software RAID5 and have just attempted to do the s= ame > for software RAID 10. Unfortunately, it is going to take 31000 minute= s, > or around 21 days to sync this array and I wish to test 3 different > stripe sizes. Is there some way to allow more bandwidth for the sync = up? echo 200000 > /proc/sys/dev/raid/speed_limit_min It's a known bug. The resync code is trying to be nice to other IO in the system, but forgets that it is itself causing lots of IO in the lower RAID layer. --=20 M=E5ns Rullg=E5rd mru@kth.se - To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html