Date: Thu, 14 Aug 1997 22:20:33 +0200 (MET DST) From: Paul Dekkers <psd@worldaccess.nl> To: "Jay D. Nelson" <jdn@qiv.com> Cc: Shawn Ramsey <shawn@luke.cpl.net>, freebsd-questions@FreeBSD.ORG Subject: Re: FreeBSD is slower than Linux !? Message-ID: <Pine.LNX.3.96.970814221735.136B-100000@gromit.nev.ml.org> In-Reply-To: <Pine.BSF.3.96.970813221305.1519B-100000@acp.qiv.com>
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On Wed, 13 Aug 1997, Jay D. Nelson wrote: >You're quite right -- but that's dangerous on a production system no >matter what the OS. I should have kept my fingers quite. You see, I >look at FreeBSD as a _production_ system. And frankly, I've found that >it does as good a job and in some areas better that commercial Unices >like AIX, Solaris and AT&TSVR4. In fact I use it in just such an >environment. and what do you think of fBSD as an internet server, or fileserver? choose another os instead of FreeBSD or? >My experience with Linux is that it poops out under load -- and some >of the distributions aren't much better than NT. Blame the pud >whackers who put together the distributions -- not the kernel. (which distrib? rh/slack/debian?) >My point was simply that when you put both under a real life multiuser >load, the differences are fairly obvious. And frankly, I wouldn't use >async mounts for anything other than news. Hmm... I tried to mount my harddisk with the async option, but I'd say it doesn't differ much; Linux fBSD fBSD with async dd-test 2.61 4.95 4.78 that's not that nice if you want to run a fileserver. >On Wed, 13 Aug 1997, Shawn Ramsey wrote: > >>> Hmm... It might be revealing if you tried all of that with a couple of >>> compiles and a tar of /usr running simultaneously. Final combined >>> times may be more revealing. >>> >>> -- Jay >>> >>> On Thu, 14 Aug 1997, Paul Dekkers wrote: >>> >>> >Hi >>> > >>> >I did some speed tests and I'd like to hear some reaction about this. >>> > >>> > Linux FreeBSD >>> >dd 2.61 4.95 dd if=/dev/zero of=/test bs=1024 count=5000 >>> >gzip 12.50 11.01 gzip -9 test >>> >gunzip 3.86 8.12 >>> >sync 4.21 0.9 -> So it seems FreeBSD writes everything to >>> > disk directly?! WHY? This makes FreeBSD >>> > much slower! >>> >unzips 4.45 41.92 decompress the sendmail distr >>> >compil 353.79 371.87 compile sendmail (makesendmail) >>> > >>> >Yes, I used the same (slow) disk on my i486 >>> >But I was really surprised discovering that FreeBSD is much slower in disk >>> >access than Linux, so why is the filesystem called FFS (fast-filesystem?!) >>> >;-) >>> > >>> >But, my main question -> I think FreeBSD is that slow because it writes >>> >everything to disk directly, without a good cache. Why is this like it is? >>> >This does not make FreeBSD very attractive for me to use as a fileserver >>> >(nfs or samba) or e.g. a mail server. >> >>Do be fair, I think you should mount the FreeBSd disks asyncronously. By >>default, it is set to Synchronously. Linux, at least it used to be this >>way, is mounted asynch. Disk access is HUGELY increases under FreeBSD if >>it is set to asynch. (mount -o async /dev/filesystem) >> > >-- Jay > -= Paul =- __ _ / |_| | / _ \ Paul Dekkers | o o `. E-Mail: Paul.Dekkers@nev.ml.org | O N.E.V - Nescio Ergo Valeo `.___/ /` \
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