From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Martin Subject: Re: Benchmarks: Linux Kernel RAID vs a Hardware RAID setup Date: Wed, 16 Jul 2008 13:44:46 +1000 Message-ID: <1216179886.5633.353.camel@sam.localdomain> References: <1216130769.5633.318.camel@sam.localdomain> <20080715163932.GA23164@rap.rap.dk> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-VB6aY2QEF1W7bGkxv8Zo" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Jon Nelson Cc: Keld =?ISO-8859-1?Q?J=F8rn?= Simonsen , linux-raid@vger.kernel.org, Ben Martin List-Id: linux-raid.ids --=-VB6aY2QEF1W7bGkxv8Zo Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable This sounds perfect for an article that compares mobo fakeraid/bois-raid for RAID-10 (if a board with it can be decided on) and kernel RAID-10. A line graph of the bonnie xfer stats from say 16kb chunks through 1mb. If/when I get this happening I'll post a link again to the list. On Tue, 2008-07-15 at 12:06 -0500, Jon Nelson wrote: > I would add to that request that you consider using a smaller chunk size. > My own benchmarks showed that for some raid levels and layouts, a > smaller chunk size gave the best overall performance. >=20 >=20 > On Tue, Jul 15, 2008 at 11:39 AM, Keld J=C3=B8rn Simonsen = wrote: > ... > > It would be interesting if you could enhance your article with benchmar= ks > > on raid10, f2 and o2 layouts. I think they would outperform HW raid, at > > least on input. And I would like to see how they perform on outout and > > rewrite, with ext3 and xfs. We do have some tests, but many of them are > > without a file system layer. >=20 >=20 >=20 --=-VB6aY2QEF1W7bGkxv8Zo Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAkh9bq4ACgkQsIKOrI+5WvPMGACeIXVXJ3sg0Basxq0B+MEwHOso pdgAnj9eBMequykthzDs9adePSzunhB/ =SZcP -----END PGP SIGNATURE----- --=-VB6aY2QEF1W7bGkxv8Zo--