Date: Mon, 27 Jan 1997 11:18:46 +0100 (MEZ) From: "Hr.Ladavac" <lada@ws2301.gud.siemens.co.at> To: dicen@hooked.net (RHS Linux User) Cc: freebsd-hackers@freebsd.org Subject: Re: What is the default for async in /etc/fstab? Message-ID: <199701271018.AA267670327@ws2301.gud.siemens.co.at> In-Reply-To: <32EBC635.4F86F1D5@hooked.net> from "RHS Linux User" at Jan 26, 97 01:01:41 pm
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E-mail message from RHS Linux User contained: > I am having trouble determining the disk IO performace of FreeBSD vs. > Linux. I recently ran a test on FreeBSD and the write performance wasn't > so great. However, I didn't think to see if async was set in the > /etc/fstab file. I installed from a 2.1 CDROM initially and then cvsuped > different versions. So what is the default for async in the 2.1 > /etc/fstab? Default is sync metadata, async file contents. If you set any value to your filesystem, and if it cannot be easily reproduced (i.e. you're not doing an initial installation or zero level restore,) I would advise very strongly against async metadata. Losing half a filesystem because fsck had to use heuristics to repair it and found a wrong consistent FS state is not my kind of fun. > > Have other people tested ufs vs. ext2? The only docs I could find where > for ext2. A comparison with FreeBSD 2.0 I think, although it could have > been older. This was for some old Linux 1.xx. Dunno. But you could try :) You seem to have both OS's. /Marino > > Hardware. Adapt. 2940UW, and Quantum 4.3gig Atlas, 7200rpm. 8.5ms. > > Thanks. >
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