Date: Thu, 17 Aug 2000 01:28:20 -0500 From: Dan Nelson <dnelson@emsphone.com> To: Chris Fedde <chris@fedde.littleton.co.us> Cc: Alfred Perlstein <bright@wintelcom.net>, Thomas Ewing <Thomas_Ewing@tamu-commerce.edu>, freebsd-questions@FreeBSD.ORG Subject: Re: Jounaling File System Message-ID: <20000817012820.A27138@dan.emsphone.com> In-Reply-To: <200008170606.e7H667h22072@fedde.littleton.co.us>; from "Chris Fedde" on Thu Aug 17 00:06:07 GMT 2000 References: <20000816191859.A4854@fw.wintelcom.net> <200008170606.e7H667h22072@fedde.littleton.co.us>
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In the last episode (Aug 17), Chris Fedde said: > * Thomas Ewing <Thomas_Ewing@tamu-commerce.edu> [000816 19:11] wrote: > > I have recently been working on setting up a linux server for > > archiving our applications for ne wcomputer installs. One of my > > concerns with using linux though, is that it does not have a > > journaling file system, so that if a sudden power loss occurs, it > > is a very tedious and time consuming task to get the linux box back > > up and running. Does freebsd have a journaling file system? I am > > assuming it does since it is unix based, but I wanted to be sure > > before I spent a lot of time setting one up and then finding out it > > doesn't. > > If the only need for a journaling file system is to support fast > recovery from power failures you should look at softupdates in the > FreeBSD ufs. This feature will almost completely eliminate > inconsistencies caused by crashing an unsynched file system. It > does not eliminate the boot time fsck, but the probability that fsck > will find a problem is minimized. Also note that FreeBSD's fsck is much faster than Linux'es. I haven't seen a filesystem that didn't fsck in less than 5 minutes after a crash, even ones with a full CVS repository (i.e. 200,000 files) or 90-gig ones full of multi-gigabyte files. I've also never had fsck -p fail on a soft-updates filesystem, even on a machine that I simply power off every night because it's a keyboardless box and I can't be bothered to telnet to it. It fscks in under 30 seconds every time, and I've only had to hook a keyboard up to it when I botch a kernel install. -- Dan Nelson dnelson@emsphone.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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