Date: Fri, 21 May 1999 21:35:48 +0000 (GMT) From: Terry Lambert <tlambert@primenet.com> To: ragnar@sysabend.org (Jamie Bowden) Cc: eivind@FreeBSD.ORG, dkelly@hiwaay.net, scrappy@hub.org, freebsd-chat@FreeBSD.ORG Subject: Re: SGI, XFS and OSS? Message-ID: <199905212135.OAA03301@usr07.primenet.com> In-Reply-To: <Pine.BSF.3.96.990520204941.10419B-100000@beelzebubba.sysabend.org> from "Jamie Bowden" at May 20, 99 08:58:17 pm
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> XFS on an indy R4600/133mhz with ultra-narrow drives on a scsi2-fast > controller did better than my K6/233mhz with AHA-2940UW with UW drives for > large directory reads and writes. This is not a useful comparison. I believe the MIPS box has a faster and wider memory bus. Since what you are measuring is I/O, not computation speed, the speed of your processor is irrelevent, so long as it is as fast or faster than your bus. Even with a 32 bit PCI controller, the PCI burst transmission rate over a 33MHz I/O bus is going to be your gating factor. People who think that all machines are as I/O limited as PC's, and that you can compare based on processor speed have bought into The Big PC Vendor Lie; I think that a MicroVAX II with a QBUS is likely to be able to put your 233MHz machine to shame for some operations, and uVAXen run at what, 16MHz? Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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