From owner-freebsd-stable Mon Jul 23 19:44: 7 2001 Delivered-To: freebsd-stable@freebsd.org Received: from morgan.angis.su.OZ.AU (morgan.angis.su.OZ.AU [129.78.25.38]) by hub.freebsd.org (Postfix) with ESMTP id 5449D37B401 for ; Mon, 23 Jul 2001 19:44:04 -0700 (PDT) (envelope-from tonym@angis.org.au) Received: from angis.org.au (p48570.net10.usyd.edu.au [10.0.189.186]) by morgan.angis.su.OZ.AU (8.9.1a/8.9.1) with ESMTP id MAA19007; Tue, 24 Jul 2001 12:43:56 +1000 (EST) Message-ID: <3B5CE0EB.2227C110@angis.org.au> Date: Tue, 24 Jul 2001 12:43:55 +1000 From: Tony Maher Reply-To: tonym@biolateral.com.au X-Mailer: Mozilla 4.77 [en] (X11; U; Linux 2.2.12 i386) X-Accept-Language: en MIME-Version: 1.0 To: "Albert D. Cahalan" , stable@freebsd.org Subject: Re: Softupdate, is it better than journaling file system? References: <200107240144.f6O1iwN277507@saturn.cs.uml.edu> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Transfer-Encoding: 7bit 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 "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 -- Tony Maher To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message