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Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!haven.umd.edu!darwin.sura.net!europa.eng.gtefsd.com!uunet!mcsun!sun4nl!philapd!apdnews!spoetnix.idca.tds.philips.nl!wilko From: wilko@idca.tds.philips.nl (Wilko Bulte) Newsgroups: comp.os.386bsd.misc Subject: Re: NetBSD IO performance Message-ID: <wilko.747165010@spoetnix.idca.tds.philips.nl> Date: 4 Sep 93 17:50:10 GMT References: <9309030243.AA03945@moose.usmcs.maine.edu> <266h9u$avt@pdq.coe.montana.edu> <CCtss7.G6B@cat-ufg.de> Sender: news@idca.tds.philips.nl Lines: 28 wis@cat-ufg.de (Bernd Wiserner) writes: >In article <266h9u$avt@pdq.coe.montana.edu>, osyjm@cs.montana.edu (Jaye Mathisen) writes: >|> In article <9309030243.AA03945@moose.usmcs.maine.edu>, >|> 1643824 >|> >|> Nate has a similar config, and to an RZ26 (DEC 1.05GB drive), he was getting >|> near MB/s writes, 1-1.5MB reads I think. (Memory is fading fast, it was >|> a long time ago). >Hmm .. I have the same disk but the write-performance is about 290 kB ( read is at 900 kB ) >I tried to play with tunefs but it had absolutely no effect ( the performance >changes were at +- 20 kb . >Yes the disk was unmonted and the data was written to the filesystem . ( tunefs reports : >blabla changed from xx to yy , and the values were the right ones. ) >Could someone post the "magic" values for this disk ? Note that the diskcontroller could make a BIG difference. I had a RZ58 (1.3Gb) on an Adaptec 1540 versus a 1740. That makes up for something like a factor 1.5 with block reads. (Note: this was observed on a non-386bsd system, but you get the idea). Just my $0.02 Wilko -- | / o / / _ Wilko Bulte mail: wilko@idca.tds.philips.nl |/|/ / / /( (_) |d|i|g|i|t|a|l| Equipment Corporation voice: +3155-432062 fax: +3155-432103 DTN: 829 2062 PO Box 245 - 7300 AE Apeldoorn - The Netherlands