Date: Wed, 7 Dec 2005 17:55:39 +0100 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: OxY <oxy@field.hu> Cc: freebsd-geom@freebsd.org Subject: Re: geom mirror write performance problem Message-ID: <20051207165538.GJ53288@garage.freebsd.pl> In-Reply-To: <000701c5fb4b$c2682010$0201a8c0@oxy> References: <000b01c5fb3c$b47456e0$0201a8c0@oxy> <20051207155133.GI53288@garage.freebsd.pl> <000701c5fb4b$c2682010$0201a8c0@oxy>
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[-- Attachment #1 --] On Wed, Dec 07, 2005 at 05:32:04PM +0100, OxY wrote: +> here's my dmesg Looks good. I was wondering if you don't have two disks on the same ATA channel, but no. I'd like you tu run a test, but don't see how it can be done without destrying your mirror. Basically, you should try running two parallel writes on you both disks. Something like this: #!/bin/sh dd if=/dev/zero of=/dev/ad0 bs=1m count=1000 & dd if=/dev/zero of=/dev/ad2 bs=1m count=1000 & wait And see how it compares to single write test. -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDlxQKForvXbEpPzQRAn1yAKDFMf24oGJ2OBLrV6Xd8Zup+wE9WQCePIoG 1N6BwFzsNFo20U48D7s3dao= =P9uk -----END PGP SIGNATURE-----
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