From owner-freebsd-questions Sun Apr 1 18:11:51 2001 Delivered-To: freebsd-questions@freebsd.org Received: from alto.i-cable.com (alto.i-cable.com [210.80.60.4]) by hub.freebsd.org (Postfix) with ESMTP id 8DDE937B719 for ; Sun, 1 Apr 2001 18:11:47 -0700 (PDT) (envelope-from lkthomas@hkicable.com) Received: from thomasq1rx10yf ([61.18.16.156]) by alto.i-cable.com (8.9.3/8.9.3) with SMTP id JAA16277; Mon, 2 Apr 2001 09:12:00 +0800 (HKT) Message-ID: <001601c0bb98$3e3b9850$9c10123d@thomasq1rx10yf> From: "Thomas Lau" To: "Mike Meyer" Cc: References: <15047.51905.378804.46171@guru.mired.org> Subject: Re: journaling file system Date: Tue, 3 Apr 2001 01:13:31 +0800 MIME-Version: 1.0 Content-Type: text/plain; charset="big5" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG ----- Original Message ----- From: "Mike Meyer" To: "Charles Burns" Cc: ; Sent: Monday, April 02, 2001 8:41 AM Subject: Re: journaling file system > Charles Burns 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 Meyer 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