From owner-freebsd-stable Mon Jul 23 20:38:12 2001 Delivered-To: freebsd-stable@freebsd.org Received: from guru.mired.org (okc-27-141-144.mmcable.com [24.27.141.144]) by hub.freebsd.org (Postfix) with SMTP id C5B2737B405 for ; Mon, 23 Jul 2001 20:38:09 -0700 (PDT) (envelope-from mwm@mired.org) Received: (qmail 12665 invoked by uid 100); 24 Jul 2001 03:38:00 -0000 From: Mike Meyer MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15196.60824.446123.550996@guru.mired.org> Date: Mon, 23 Jul 2001 22:38:00 -0500 To: tonym@biolateral.com.au Cc: "Albert D. Cahalan" , stable@freebsd.org Subject: Re: Softupdate, is it better than journaling file system? In-Reply-To: <3B5CE0EB.2227C110@angis.org.au> References: <200107240144.f6O1iwN277507@saturn.cs.uml.edu> <3B5CE0EB.2227C110@angis.org.au> X-Mailer: VM 6.90 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid X-face: "5Mnwy%?j>IIV\)A=):rjWL~NB2aH[}Yq8Z=u~vJ`"(,&SiLvbbz2W`;h9L,Yg`+vb1>RG% *h+%X^n0EZd>TM8_IB;a8F?(Fb"lw'IgCoyM.[Lg#r\ Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Tony Maher types: > "Albert D. Cahalan" wrote: > > > > Sung Nae Cho writes: > > > > > I was wondering if there is a real perferomance comparison > > > between softupdates and journaling file systems > > > > No, there is not. > > > > Journalling can be very fast when sync writes are required. > > (for email, NFS, or whatever) At other times, it can be slow. > > Your mileage may vary. > > > > Note that many journalling filesystems have performance > > benefits that are completely unrelated to journalling. > > This is simply a result of newer design. > > Or you could read some actual research on the subject: > > http://www.usenix.org/publications/library/proceedings/usenix2000/general/seltzer.html That version requires a membership in usenix. One of the authors has published it at 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-stable" in the body of the message