Date: Wed, 7 Dec 2005 21:25:53 +0100 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: John-Mark Gurney <gurney_j@resnet.uoregon.edu> Cc: OxY <oxy@field.hu>, freebsd-geom@FreeBSD.org Subject: Re: geom mirror write performance problem Message-ID: <20051207202553.GN53288@garage.freebsd.pl> In-Reply-To: <20051207185945.GQ55657@funkthat.com> References: <20051207165538.GJ53288@garage.freebsd.pl> <002201c5fb56$bff37590$0201a8c0@oxy> <20051207185945.GQ55657@funkthat.com>
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[-- Attachment #1 --] On Wed, Dec 07, 2005 at 10:59:45AM -0800, John-Mark Gurney wrote: +> OxY wrote this message on Wed, Dec 07, 2005 at 18:50 +0100: +> > i removed the each disk from mirror one-by-one and ran the tests: +> > (when i removed one disk from the mirror the write speed was ok, +> > since i added it again, then they were slow.. +> > it was no difference which disk i did removed..) +> +> I know this might be a stupid question, but did you wait for the mirror +> to sync before doing your write test? Did you?:) +> pjd, does gmirror limit how fast it rebuilds the mirror? Yes, via sysctls: kern.geom.mirror.syncs_per_sec: Number of synchronizations requests per second kern.geom.mirror.reqs_per_sync: Number of regular I/O requests per synchronization request -- 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) iD8DBQFDl0VRForvXbEpPzQRAg/HAKCVGanO3xmP0/HKpju9g1UM5z63xwCgzoPz 0I2c66CCFBcZDZNmsSdofX0= =SiYt -----END PGP SIGNATURE-----help
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