Date: Fri, 19 Jun 1998 00:31:04 +0200 (CEST) From: Wilko Bulte <wilko@yedi.iaf.nl> To: spork@super-g.com (spork) Cc: hackers@FreeBSD.ORG Subject: Re: Disk Cache Message-ID: <199806182231.AAA05620@yedi.iaf.nl> In-Reply-To: <Pine.BSF.3.96.980618173600.17695A-100000@super-g.inch.com> from spork at "Jun 18, 98 05:44:10 pm"
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As spork wrote... > I have a question about FBSD's disk cache mechanism. What happens when > you run a SCSI-SCSI raid controller that contains it's own cache memory? > The kernel has no way of knowing that some things are already cached out > beyond the SCSI card, so I assume it would cache something that's already > cached, right? How do you work around that? Is there some way of telling Yes. > it "hey, don't be very aggressive with your disk caching"? Or is it such > a low priority thing that memory isn't used for cache unless there's no > other use for it? I don't think there is a way to 'tell' the kernel there is (non volatile please) writeback cache on a RAIDbox. Wilko _ ______________________________________________________________________ | / o / / _ Bulte email: wilko @ yedi.iaf.nl |/|/ / / /( (_) Arnhem, The Netherlands WWW: http://www.tcja.nl ______________________________________________ Powered by FreeBSD __________ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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