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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.rmit.EDU.AU!news.unimelb.EDU.AU!munnari.OZ.AU!news.mel.connect.com.au!news.mira.net.au!inquo!news.seinf.abb.se!nooft.abb.no!Norway.EU.net!EU.net!ieunet!maths.tcd.ie!not-for-mail From: dwmalone@maths.tcd.ie (David Malone) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: CCD question - URGENT Date: 20 Jun 1996 17:17:19 +0100 Organization: Dept. of Maths, Trinity College, Dublin, Ireland. Lines: 30 Message-ID: <4qbtif$g4o@salmon.maths.tcd.ie> References: <4q9r8n$kr2@news.ios.com> <31C91940.15FB@onthenet.com.au> NNTP-Posting-Host: salmon.maths.tcd.ie Tony Griffiths <tonyg@onthenet.com.au> writes: >Rashid, >Btw, any perls of wisdom on interleave factors, newfs -b -f -i ... >parameters et al to use to make a good (if anything can be good in the >context of news!?) filesystem for news would be appreciated. There I've heard that 1 cylinder is a good interleave factor for news... Here are the results I got from 2 Connor FilePros with various interlave factors. The results are from iozone, so they are for sequential file access - not really a good example for news. The interleave factor is in sectors. Same Controler Different Controller Interleave W/R Speed (MB/s) W/R Speed (MB/s) 8 1 16 1.6 5.4 32 2.1 5.8 64 2.9 6.7 128 4.5 7.3 5.4 7.5 256 5.3 7.2 5.4 7.6 512 5.9 7.1 5.9 7.2 1024 6.1 6.8 6.1 6.8 (1cy) 1044 6.3 6.7 6.3 7.0 2048 6.4 6.5 6.5 6.5 (2cy) 2088 6.2 6.5 6.2 6.6 4096 5.7 6.4 5.8 6.4 David.