From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Scobie Subject: Re: RAID halting Date: Fri, 24 Apr 2009 18:50:31 +1200 Message-ID: <49F16137.1050108@sauce.co.nz> References: <20090424045222253.GZTS2063@cdptpa-omta04.mail.rr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20090424045222253.GZTS2063@cdptpa-omta04.mail.rr.com> Sender: linux-raid-owner@vger.kernel.org To: lrhorer@satx.rr.com Cc: Linux RAID Mailing List List-Id: linux-raid.ids Leslie Rhorer wrote: > > 3. The man page says "When a filesystem is created on a logical volume > device, mkfs.xfs will automatically query the logical volume for > appropriate sunit and swidth values." Does this mean it is best for me to > simply not worry about setting these parameters and let mkfs.xfs do it, or > is there a good reason for me to intervene? XFS will do exactly that and choose the correct sunit and swidth based upon the RAID stripe size you have chosen - do not worry about it. > 5. Finally, one other thing concerns me a bit. The researchers I read > suggested XFS has by far the worst file deletion performance of any of the > journaling file systems, and Reiserfs supposedly has the best. I find that > shocking, since deleting multi-gigabyte files on the existing file system > can take a rather long time - close to a minute. Small to moderate sized > files get deleted in a flash, but 20GB or 30GB files take forever. I didn't Quad core Xeon 2.8GHz md RAID6 of 16 x 750GB. Delete 20GB file: time rm -f dump real 0m1.849s user 0m0.000s sys 0m1.633s Regards, Richard