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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!howland.erols.net!news.mathworks.com!news.kei.com!news.thenet.net!uunet!in3.uu.net!204.245.3.50!news.primenet.com!news.primenet.com!not-for-mail From: "Russell L. Carter" <rcarter@consys.com> Newsgroups: comp.unix.bsd.freebsd.misc,comp.unix.bsd.bsdi.misc,comp.sys.sgi.misc Subject: Re: no such thing as a "general user community" Date: 30 Mar 1997 10:34:01 -0700 Organization: Conceptual Systems & Software Lines: 61 Message-ID: <333EA3EF.41C67EA6@consys.com> References: <331BB7DD.28EC@net5.net> <5g9hjp$api@flea.best.net> <5gmb58$6jd$1@news.clinet.fi> <5gn3ig$83d@flea.best.net> <5goqrq$5ak$1@news.clinet.fi> <5hd29s$e7t@fido.asd.sgi.com> <333C1614.ABD@sgi01.grn.aera.com> <5hhv1k$jh9@fido.asd.sgi.com> <333E3530.794B@sgi01.grn.aera.com> X-Posted-By: @207.218.17.187 (eandert) X-Mailer: Mozilla 3.01Gold (X11; U; FreeBSD 2.2-GAMMA i386) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:38063 comp.unix.bsd.bsdi.misc:6508 comp.sys.sgi.misc:29526 Lee Ward wrote: > > Larry McVoy wrote: > [...] > > > > Example configurations with performance results > > ----------------------------------------------- > > > > The following configurations used IBM 2GB drives, BDSpro 1.0, and > > Hippi. There were 3 disks per controller (fast&wide 20MB/sec SCIP > > card SCSI controllers), the transfer sizes were exactly the stripe > > width, and the results are in MB/sec. A MB here is the size type, > > i.e., 1024*1024; all numbers are 4% too small if you like the 10^6 > > definition of a MB. Expect much lower results if you use sizes > > smaller than the stripe width, slightly lower results if you use > > transfer sizes that are unaligned with respect to the stripe > > width. The BDS writes are slower than XFS largely because of the > > synchronous nature of BDS writes. > > > > All numbers were measured with lmdd, a part of lmbench. > > > > Disks stripe stripe XFS BDS > > unit width read write read write > > 27 128k 3456k 99 64 72 35 > > > > And I can do that on a uniprocessor R10K system. I dunno what our disk > > prices are today, I'm sure they are too high in everyone except SGI's > > opinion, but suppose a disk costs $3K. That's about $90K in disks and > > mebbe $40K in system (should be cheaper but you need a hippi board and > > we charge for those). Hardly hundreds of thousands of dollars. > > > > So, what you are saying is that $130,000 isn't in the "hundreds"? Since > you don't seem to take a hint well, I'll say it plainly: you are > comparing a one-hundred thousand dollar machine to a 20,000 dollar > machine. You are using figures from that 100,000 dollar machine to argue > that someone should buy it or a cousin as a news server? Why? > In Larry's phrasing, about $12K in disks and mebbe $8K in system (actually, Gold Plated System, must be a 24x7 1hr hardware component replacement service contract buried in there somewhere), for say 4-6 way striping if you happened to be running FreeBSD. Seems like this technique of using faster hardware to "demonstrate" better software performance has been wielded before... at Usenix, maybe? ;-) > > -- > > --- > > Larry McVoy lm@sgi.com http://reality.sgi.com/lm (415) 933-1804 -- Russell L. Carter Voice:(520) 636-2600 FAX:(520) 636-2888 rcarter@consys.com Conceptual Systems & Software, P.O. Box 1129 Chino Valley AZ 86323 "Before sitting down, always look for ferrets."