From owner-freebsd-hackers Mon Jan 27 00:52:31 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id AAA26456 for hackers-outgoing; Mon, 27 Jan 1997 00:52:31 -0800 (PST) Received: from pegasus.my.domain (sole-11.ppp.hooked.net [206.80.9.203]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id AAA26451 for ; Mon, 27 Jan 1997 00:52:28 -0800 (PST) Received: from pegasus.my.domain (localhost [127.0.0.1]) by pegasus.my.domain (8.7.6/8.7.3) with SMTP id AAA00605 for ; Mon, 27 Jan 1997 00:52:53 -0800 Message-ID: <32EC6CE5.64E60DE1@hooked.net> Date: Mon, 27 Jan 1997 00:52:53 -0800 From: dicen X-Mailer: Mozilla 3.01Gold (X11; I; Linux 2.0.27 i686) MIME-Version: 1.0 To: freebsd-hackers@freebsd.org Subject: Performance of ufs vs. ext2. References: <199701270553.QAA25341@godzilla.zeta.org.au> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Bruce Evans wrote: > > >> Have other people tested ufs vs. ext2? The only docs I could find where > >> ... > >The performance that I have measured (sequential -- IOZONE) is that > >FreeBSD is faster in both read/write. However, our metadata performance > >is slower (filecreates/deletes.) With -async, our metadata is still > >slower, but not by orders of magnitude. FreeBSD's cache perf is much > >faster (by factors of 3-4.) Much of it is due to the default block > >size (8K vs. 1K.) But the fragment size of an 8K UFS filesystem is > >the *same* as a 1K ext2fs. > > In my tests, ext2fs is fastest for huge sequential i/o's when the block > sizes are closer (8K vs 4K), but there was only a small difference (less > than 10%) between the best and worst cases (best: ext2fs under FreeBSD, > next: ext2fs under Linux, worst: ext2fs under Linux) except for rewrite, > which was 66% faster under Linux than under FreeBSD. Cache performance > also catches up (46MB/sec for FreeBSD-current-last-November, 41MB/sec > for Linux-2.0.20). A 4K fragment size wastes space probably wastes time > in most cases. > > Bruce Okay cool some real numbers. When you speak of "rewrite" are you talking about the creation and deletion of files (Metadata)? There seams to be a significant speed difference between the creation and deletion of files on linux ext2 vs. Freebsd ufs. Linux ext2 is way faster. I suppose I could just run ext2 under FreeBSD right? It sure would make a "make world" faster. You know if someone were to setup a news server it would seam to make more sence to use ext2.