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Date: Wed, 24 Nov 2004 11:36:13 +0100
From: Pawel Jakub Dawidek <pjd@FreeBSD.org>
To: Ivan Voras <ivoras@fer.hr>
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Subject: Re: gvinum panic?
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On Tue, Nov 23, 2004 at 02:20:07PM +0100, Ivan Voras wrote:
+> Lukas Ertl wrote:
+> >On Mon, 22 Nov 2004, Ivan Voras wrote:
+> >
+> >>I'm consistently getting a system panic, trap #12 in process g_event=
=20
+> >>when I try:
+> >
+> >
+> >Are you sure that kernel (modules) and userland are in sync?
+>=20
+> Thanks, it looks like they've been unsynced for a while :(
+> It's ok now.
+>=20
+> But, the performance is pretty bad (same with regular vinum). I tried=20
+> setting up graid3 class with same parameters, and got these results:
+>=20
+> linear read (1024 MB file, blocks of 32768) .................  38.5 MB/s
+> linear write (1024 MB file, blocks of 32768) ................  16.8 MB/s
+> random read (1024 MB file, blocks of 32768) .................  41.9 MB/s
+> random write (1024 MB file, blocks of 32768) ................   3.4 MB/s

Do you use parity component for reading? If no, you can try it (add '-r'
option while configuring your raid3 device), it should speed up random
reads a lot.

--=20
Pawel Jakub Dawidek                       http://www.FreeBSD.org
pjd@FreeBSD.org                           http://garage.freebsd.pl
FreeBSD committer                         Am I Evil? Yes, I Am!

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