From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (Postfix) with ESMTP id EB4A47CBF for ; Tue, 4 Jun 2013 11:20:34 -0500 (CDT) Date: Tue, 4 Jun 2013 11:20:30 -0500 From: Ben Myers Subject: Re: Debunking myths about metadata CRC overhead Message-ID: <20130604162030.GJ20932@sgi.com> References: <20130603074452.GZ29466@dastard> <20130603111011.461d10b5@galadriel.home> <20130604025307.GB29466@dastard> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20130604025307.GB29466@dastard> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com Dave, On Tue, Jun 04, 2013 at 12:53:07PM +1000, Dave Chinner wrote: > On Mon, Jun 03, 2013 at 11:10:11AM +0200, Emmanuel Florac wrote: > > Le Mon, 3 Jun 2013 17:44:52 +1000 vous =E9criviez: > > = > > > There has been some assertions made recently that metadata CRCs have > > > too much overhead to always be enabled. So I'll run some quick > > > benchmarks to demonstrate the "too much overhead" assertions are > > > completely unfounded. > > = > > Just a quick question: what is the minimal kernel version and xfsprogs > > version needed to run xfs with metadata CRC? I'd happily test it on > > real hardware, I have a couple of storage servers in test in the 40 to > > 108 TB range. > = > If the maintainers merge all the patches I send for the 3.10-rc > series, then the 3.10 release should be stable enough to use for > testing with data you don't care if you lose. > = > As for the userspace code - that is still just a patchset. I haven't > had any feedback from the maintainers about it in the past month, so > I've got no idea what they are doing with it. I'll post out a new > version in the next couple of days - it's 50-odd patches by now, so > it'd be nice to have it in the xfsprogs git tree so people could > just pull it and build it for testing purposes by the time that 3.10 > releases.... When it is reviewed and adequately tested we'll pull it in. Until then Emmanuel will need to pull down the patchset. Right now the focus is on 3.10. -Ben _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs