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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!lucy.swin.edu.au!news.rmit.EDU.AU!news.unimelb.EDU.AU!munnari.OZ.AU!news.mel.connect.com.au!news.mel.aone.net.au!grumpy.fl.net.au!news.webspan.net!newsfeeds.sol.net!news.maxwell.syr.edu!news.mathworks.com!uunet!in3.uu.net!199.232.136.71!venus.os.com!news.os.com!craigs From: craigs@os.com (Craig Shrimpton) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: FreeBSD 2.1.6 Striping Performance Date: Sat, 08 Feb 1997 00:17:58 -0500 Organization: Orbit Systems Lines: 29 Message-ID: <craigs-ya02408000R0802970017580001@news.os.com> References: <5d87kv$sin@news.pcslink.com> <5d9ncn$hv@gosset.maths.tcd.ie> NNTP-Posting-Host: titan.os.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: Yet Another NewsWatcher 2.4.0 Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:35220 In article <5d9ncn$hv@gosset.maths.tcd.ie>, ajudge@maths.tcd.ie (Alan Judge) wrote: > Striping: Full 4GB partition on each drive, interleave as below. > Performance tested with iozone (2GB file, 64K reads and writes) > > Interleave Read perf Write perf > 16 21MB/s 11MB/s > 32 23.9 15.2 > 64 24.5 18.8 > 128 24 18.7 > 256 21.5 19.9 > 512 20 20 > 2048 11.7 20 > Several people have suggested that one should use the maximum interleave (65536) for a news spool. The theory is that the interleave should be 1 disk cylinder. Do you concur with this? The reasoning was unclear to me although a fair number of people suggested the max interleave. Thanks, Craig -- THIS TAG NOT TO BE REMOVED UNDER PENALTY OF LAW EXCEPT BY THE CONSUMER