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Newsgroups: comp.unix.bsd.freebsd.misc Path: sserve!euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!simtel!zombie.ncsc.mil!news.mathworks.com!newsfeed.internetmci.com!tank.news.pipex.net!pipex!howland.reston.ans.net!EU.net!sun4nl!news.iaf.nl!iafnl.iaf.nl!yedi!wilko From: wilko@yedi.iaf.nl (Wilko Bulte) Subject: Re: Can FreeBSD do disk striping? Organization: Private FreeBSD site - Arnhem - The Netherlands Message-ID: <DCr5ML.12H@yedi.iaf.nl> References: <3vi4jb$c5t@owl.und.ac.za> <3vnqu7$rme@abel.cc.sunysb.edu> Date: Thu, 3 Aug 1995 20:44:45 GMT Lines: 24 vernick@cs.sunysb.edu (Michael Vernick) writes: >Ewan McPhail (chops@kestrel.ugrd.und.ac.za) wrote: >: Hi all, here's hoping someone can help me. >: Simply put, can FreeBSD (2.0.5 R) perform disk striping? >: I'm interested in doing this to take some of the load off a straining >: drive (more heads = less of a strain). >No. For small normal NFS type reads, it does not pay to stripe >data across multiple drives. Instead of paying for 1 seek and >rotation per access on 1 drive, you now have N seeks and N rotations. >(Assuming the drive spindles are not synchronized.) Why not put >different file systems on different drives to balance out the load some. Huh? As long as your incoming I/O load is random in nature and the average I/O size fits in the stripe size chosen for the stripe set striping works fine. >Michael Vernick vernick@sbcs.sunysb.edu >Dept. Of Computer Science @ SUNY SB (516)-632-8434 >Stony Brook, NY 11794 Wilko