Return to BSD News archive
Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msuinfo!agate!howland.reston.ans.net!vixen.cso.uiuc.edu!newsrelay.iastate.edu!news.iastate.edu!ponderous.cc.iastate.edu!michaelv
From: michaelv@iastate.edu (Michael L. VanLoon)
Newsgroups: comp.os.386bsd.questions
Subject: Re: How to get better SCSI performance? [FreeBSD 1.1R/AHA1542Cf]
Date: 19 Jun 94 22:28:33 GMT
Organization: Iowa State University, Ames, Iowa
Lines: 20
Message-ID: <michaelv.772064913@ponderous.cc.iastate.edu>
References: <CrKBr2.8oJ@mozo.cc.purdue.edu> <Z2zQYYR.dysonj@delphi.com> <CrM6Ko.qFy@mozo.cc.purdue.edu>
NNTP-Posting-Host: ponderous.cc.iastate.edu
In <CrM6Ko.qFy@mozo.cc.purdue.edu> bj@staff.cc.purdue.edu (Ben Jackson) writes:
>This gives me about 700K/s, which still isn't very good... Even the
>slower of the two drives did 1.5M/s sustained when it was connected to
>an Amiga... I'd like to get some of that back. :-)
You mentioned in your original post that you tested it with iozone.
You do realize iozone tests performance *through* the filesystem? I
would bet 10-1 that your Amiga test program tested the raw disk. The
figures will always be very different, since testing the raw disk
measures only the hardware performance. Iozone measures the hardware,
*plus* the efficiency of the filesystem code. This will *always* be
slower.
--
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Michael L. VanLoon Iowa State University Computation Center
michaelv@iastate.edu Project Vincent Systems Staff
Free your mind and your machine -- NetBSD free Un*x for PC/Mac/Amiga/etc.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -