From owner-freebsd-hackers Mon Jun 18 3:34:43 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from mail.webmonster.de (datasink.webmonster.de [194.162.162.209]) by hub.freebsd.org (Postfix) with SMTP id 7DFE337B403 for ; Mon, 18 Jun 2001 03:34:34 -0700 (PDT) (envelope-from karsten@rohrbach.de) Received: (qmail 91090 invoked by uid 1000); 18 Jun 2001 10:34:53 -0000 Date: Mon, 18 Jun 2001 12:34:53 +0200 From: "Karsten W. Rohrbach" To: Dag-Erling Smorgrav Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Article Network performance by OS Message-ID: <20010618123453.B89983@mail.webmonster.de> Mail-Followup-To: "Karsten W. Rohrbach" , Dag-Erling Smorgrav , freebsd-hackers@FreeBSD.ORG References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-md5; protocol="application/pgp-signature"; boundary="bCsyhTFzCvuiizWE" Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from des@ofug.org on Sun, Jun 17, 2001 at 07:48:27AM +0200 X-Arbitrary-Number-Of-The-Day: 42 X-URL: http://www.webmonster.de/ X-Disclaimer: My opinions do not necessarily represent those of my employer Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG --bCsyhTFzCvuiizWE Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Dag-Erling Smorgrav(des@ofug.org)@2001.06.17 07:48:27 +0000: > Rik van Riel writes: > > Not quite. Linux distributions tend to be extremely > > conservative in the IDE options (DMA, interrupt unmasking, > > write caching, etc. all disabled) while FreeBSD seems to > > have write caching and DMA on by default... >=20 > Ahem. >=20 > First of all, Linux' file system (ext2fs) is more or less equivalent, > in terms of performance and integrity, to async ffs. This gives Linux > a big performance edge out of the box, and FreeBSD a big reliability > edge - but benchmark authors rarely care about fs integrity, as > shutting off the power during heavy disk I/O isn't generally part of > their benchmark. well, IMVHO, it should be ;-) >=20 > Second, we tried turning write caching on ATA drives off by default, > and boy were you (the user community) pissed. Yes, turning wc off > shows you just how crappy those non-tagged-queueing 4000 RPM ATA > drives you picked up at Fry's for some pocket change are. So we > turned it back on. If you're not happy with that, put 'hw.ata.wc=3D"0"' > in your /boot/loader.conf and they'll be off after the next reboot. > Or get real disks. that's one for the handbook, eh? imagine: Q: i got problem {...}, it seems to depend on (ATA|IDE|disk|drive|...) A: get real hardware, you're running a production system, aren't you? it would be a nice thing[tm] to have such stuff in the docs. /k --=20 > Zero Defects, n.: The result of shutting down a production line.=20 KR433/KR11-RIPE -- WebMonster Community Founder -- nGENn GmbH Senior Techie http://www.webmonster.de/ -- ftp://ftp.webmonster.de/ -- http://www.ngenn.n= et/ karsten&rohrbach.de -- alpha&ngenn.net -- alpha&scene.org -- catch@spam.de GnuPG 0x2964BF46 2001-03-15 42F9 9FFF 50D4 2F38 DBEE DF22 3340 4F4E 2964 B= F46 --bCsyhTFzCvuiizWE Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE7LdlNM0BPTilkv0YRAiN6AJ9FeZ1aYGOR8NIYMJoGOYfK/q675gCfTXlS CwaUGZFkvk/MhQgrrj7Vsjk= =Wb5j -----END PGP SIGNATURE----- --bCsyhTFzCvuiizWE-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message