Date: Mon, 28 May 2001 20:34:35 +0200 From: Wilko Bulte <wkb@freebie.demon.nl> To: "E.B. Dreger" <eddy+public+spam@noc.everquick.net> Cc: hackers@freebsd.org Subject: Re: brainstorm: "intermediate" disk caching Message-ID: <20010528203435.F619@freebie.demon.nl> In-Reply-To: <Pine.LNX.4.20.0105281619110.5344-100000@www.everquick.net>; from eddy%2Bpublic%2Bspam@noc.everquick.net on Mon, May 28, 2001 at 04:31:17PM %2B0000 References: <Pine.LNX.4.20.0105281619110.5344-100000@www.everquick.net>
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On Mon, May 28, 2001 at 04:31:17PM +0000, E.B. Dreger wrote: > Greetings all, > > I just had a brainstorm... > > I was thinking about database servers with several spindles in a RAID 5 > array. Write performance is inherently disappointing -- which may or may > not be an issue. > > Would it be worth the trouble to design an "intermediate" cache, whereby > data are quickly written to a spool disk, then to the final destination? Most hardware RAID boxes do exactly that ;) For anything serious only consider battery-backed up writeback cache, with mirrored caches, and redundant RAID array controllers. Start saving your $$ now ;) -- | / o / / _ Arnhem, The Netherlands email: wilko@freebsd.org |/|/ / / /( (_) Bulte Powered by FreeBSD/alpha http://www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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