Date: Tue, 3 Apr 2001 01:13:31 +0800 From: "Thomas Lau" <lkthomas@hkicable.com> To: "Mike Meyer" <mwm@mired.org> Cc: <questions@FreeBSD.ORG> Subject: Re: journaling file system Message-ID: <001601c0bb98$3e3b9850$9c10123d@thomasq1rx10yf> References: <15047.51905.378804.46171@guru.mired.org>
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----- Original Message ----- From: "Mike Meyer" <mwm@mired.org> To: "Charles Burns" <burnscharlesn@hotmail.com> Cc: <questions@FreeBSD.ORG>; <mail@krel.org> Sent: Monday, April 02, 2001 8:41 AM Subject: Re: journaling file system > Charles Burns <burnscharlesn@hotmail.com> types: > > Technically no, but the main reason to use a journaling FS is for stability > > in the face of adversity (such as when power is lost in the middle of a > > write) > > I have tested UFS (The FreeBSD filesystem) several times by killing the > > power during a write. It has never lost data as far as I can tell, and is > > certainly a much mor estable filesystem than EXT2 (the reason Journaling is > > such a buzzword) or FATxx (the infamous awful filesystem of the Microsoft > > world) > > With SoftUpdates, UFS is the second fastest filesystem that I have ever > > used, second to Irix's filesystem. (Speed measured with streaming large > > files, UFS probably beats Irix with many smaller files) > > If you need extreme filesystem stability, UFS set to write synchronously is > > stable enough to trust with a mission-critical system Of course, you should > > also have at least one UPS on that mission critical system too. ;) > > One of the things a journalling file system buys you is quick recovery > after a crash. The snapshots facility - still in development - will > add that to the mix for ffs (the other name for the BSD file system). > > <mike > -- > Mike Meyer <mwm@mired.org> http://www.mired.org/home/mwm/ > Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > > where can I found these info? URL please, Thanks To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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