Date: Mon, 14 Oct 2002 11:28:52 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Christoph Hellwig <hch@infradead.org> Cc: "M. Warner Losh" <imp@bsdimp.com>, wes@softweyr.com, dillon@apollo.backplane.com, vova@sw.ru, nate@root.org, arch@FreeBSD.ORG Subject: Re: Database indexes and ram Message-ID: <3DAB0CE4.642A949E@mindspring.com> References: <200210082051.g98KpjU1084793@apollo.backplane.com> <3DA4C271.37AACAA3@softweyr.com> <20021012135245.A16453@infradead.org> <20021012.150616.129769790.imp@bsdimp.com> <20021013133106.C15151@infradead.org> <3DA9B4E1.1257DAA8@mindspring.com> <20021014152933.A16492@infradead.org>
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Christoph Hellwig wrote: > > Name one motherboard with more than 2 64 bit PCI slots. > > IBM summit (x440), IBM/Sequent NUMAQ, Unisys es7xxx, many serverworks-base > big boards. Apples' current G4 PowerMACs, etc for the ones with 32bit CPUs. > > For 64bit CPUs: most PCI-based UltraSparcs, SGI SN0/SN1/SN2 (mips and ia64), > many AlphaServers, many Power4-based IBM pSeries machiens, NEC AzusA, > and I"m sure I forgot a few. Not to mention other designs > on which Linux doesn't even run. Non-OEM 32 bit Intel processor using boards are the ones of interest. Someone else pointed out that SuperMicro now sells a couple of them. Most of the 64 bit slots are limited to 66MHz on most of the boards on the page theiy pointed to, even for the OEM boards, with only 2 slots at 100MHz. The interesting question is bandwidth, for the problems we've been talking about. Probably, I should have asked for "non-OEM 32 bit Intel processor boards with 64 bit PCI-PCI bridge chips, no 32 bit slots, and a guaranteed 64 bit datapath all the way to all the cards". PCI-X for all is interesting, too, in that it raises the bandwith limit to a burst rate of 8Gbit. IMO, if the UVA space isn't enlarged, you are going to be paying the cost in I/O for the database applications we've been discussing. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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