Date: Wed, 23 May 2001 09:54:42 -0700 From: Kris Kennaway <kris@obsecurity.org> To: "Andresen,Jason R." <jandrese@mitre.org> Cc: Kris Kennaway <kris@obsecurity.org>, Nadav Eiron <nadav@cs.Technion.AC.IL>, hackers@FreeBSD.ORG Subject: Re: technical comparison Message-ID: <20010523095442.B9896@xor.obsecurity.org> In-Reply-To: <20010523081344.R87127-100000@nausicaa.mitre.org>; from jandrese@mitre.org on Wed, May 23, 2001 at 08:17:12AM -0400 References: <20010522144728.B29988@xor.obsecurity.org> <20010523081344.R87127-100000@nausicaa.mitre.org>
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--Qxx1br4bt0+wmkIi Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, May 23, 2001 at 08:17:12AM -0400, Andresen,Jason R. wrote: > > Did you enable write caching? You didn't mention, and it's off by > > default in 4.3, but I think enabled by default on Linux. >=20 > I tried to leave the FreeBSD and Linux boxes as unchanged as possible for > my tests (they are lab machines that have other uses, although I made sure > they were idle during the test periods). >=20 > I left write caching enabled in the Linux boxes, and left it disabled on > the FreeBSD boxes. Personally, I'm hesitant to enable write caching > on FreeBSD because we tend to use it on machines where we really really > don't want to lose data. Write caching is ok on the Linux machines > because we use them as pure testbeds that we can reconstruct easily if > their disks go south. That's all well and good, but I thought the aim here was to compare Linux and FreeBSD performance on as level playing field as possible? You're not measuring FS performance, you're measuring FS performance plus cache performance, so your numbers so far tell you nothing concrete. Kris --Qxx1br4bt0+wmkIi Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.5 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE7C+tSWry0BWjoQKURAvpeAKDPzVx0Uycuc74jS2gIYLIgK3F9ZQCghkkk 1YaIT9TgUDn2wkwd75Z9+rY= =LnEO -----END PGP SIGNATURE----- --Qxx1br4bt0+wmkIi-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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