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: Thu, 17 Jul 2008 01:42:23 +1000 Message-ID: <1216222943.10437.20.camel@sam.localdomain> References: <1216130769.5633.318.camel@sam.localdomain> <20080715163932.GA23164@rap.rap.dk> <8CAB4B2168C7183-B68-AD2@webmail-ng19.sysops.aol.com> <20080715173927.GA24745@rap.rap.dk> <487D3A44.7000008@sauce.co.nz> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-8EoJtZQtApFpSW+pqQhs" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Jon Nelson Cc: Richard Scobie , Keld =?ISO-8859-1?Q?J=F8rn?= Simonsen , thomas62186218@aol.com, linux-raid@vger.kernel.org, Ben Martin List-Id: linux-raid.ids --=-8EoJtZQtApFpSW+pqQhs Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Tue, 2008-07-15 at 19:20 -0500, Jon Nelson wrote: > On Tue, Jul 15, 2008 at 7:01 PM, Richard Scobie wro= te: > > Keld J=C3=B8rn Simonsen wrote: > > > >> I would actually welcome more tests with specific user profiles, like > >> many small reads and writes for database use, and concurrent random > >> reading and writing to simulate the load on a server. What bonnie++ is > >> reporting is only equential IO. This is important on work stations, bu= t > >> actually not on servers. > > > > The following is from the Bonnie++ man page: > > > > "There are two sections to the program's operations. The first is t= o > > test the IO throughput in a fashion that is designed to simulate some > > types of database applications. The second is to test creation, reading= and > > deleting many small files in a fashion similar to the usage patterns of > > programs such as Squid or INN." > > > > So I guess the author thinks it's valid for more than sequential I/O. > > > > In any case, while we may be in a minority, Justin, I and a few others = are > > interested in sequential I/O, as we build servers required to read and = write > > multiple streams of uncompressed SD and HD video in realtime. >=20 > In that case, the 'fstest' program (google for it, it's associated > with the samba folks IIRC), might be just the ticket. Since I was digging around, the link for future readers; http://www.samba.org/ftp/unpacked/junkcode/fstest.c --=-8EoJtZQtApFpSW+pqQhs 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) iEYEABECAAYFAkh+Ft8ACgkQsIKOrI+5WvOxZQCeIvu9VVf2EL9+x1cEepU3hjRs PFgAoO/30+gedgMMS6E0rz/trAbIgrL3 =1aTE -----END PGP SIGNATURE----- --=-8EoJtZQtApFpSW+pqQhs--