Date: Sun, 9 Mar 1997 01:55:08 -0500 (EST) From: Brian Tao <taob@risc.org> To: "matthew c. mead" <mmead@goof.com> Cc: isp@freebsd.org, hackers@freebsd.org Subject: Re: freebsd as a news server? Message-ID: <Pine.BSF.3.95.970309015111.22711A-100000@alpha.risc.org> In-Reply-To: <199703090439.XAA12069@goof.com>
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On Sat, 8 Mar 1997, matthew c. mead wrote:
>
> I've got the striping factor set to 255 blocks (per a suggestion in
> the docs for ccd).
For a news server, a stripe size of 65536 blocks (32 megabytes)
will give you optimal results, due to the mechanics of UFS's file and
directory layout in a cylinder group (which by default is 32MB). That
ccd configuration will tend to localize all disk access related to
reading a random file to a single drive in your array, thus allowing
maximum concurrency across the RAID. This is why having many smaller
disks is better than having a few larger disks.
--
Brian Tao (BT300, taob@risc.org)
"Though this be madness, yet there is method in't"
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