Date: Mon, 27 Oct 2003 09:58:43 -0500 From: Charles Swiger <cswiger@mac.com> To: Rishi Chopra <rchopra@cal.berkeley.edu> Cc: questions@freebsd.org Subject: Re: Choosing A Stripe-Size (RAID5 Array) Message-ID: <0EB47888-088E-11D8-8AC4-003065ABFD92@mac.com> In-Reply-To: <MDENIIAHFGAKAOJHCEGLIEBMCGAA.rchopra@cal.berkeley.edu>
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On Sunday, October 26, 2003, at 07:42 PM, Rishi Chopra wrote: > I'm setting up a 600GB Raid-5 array (4-200GB 8MB Buffer IDE disks > connected > to an Adaptec 2400A controller) and would like some help picking a > stripe-size (this is the smallest unit of data written to each disk by > the > raid controller.) My usage pattern is fileserver and webserver+db, > some > light desktop usage as well. I'll be using defaults for the file > system > (16K block size.) Databases really don't interact well with RAID-5; you would be better off using RAID-1 mirrors for the volumes which the DB uses. RAID-5 is okay for fileserving if you're not write-intensive (ie, read-mostly)... -- -Chuck
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