Date: Fri, 7 Apr 1995 11:27:29 -0500 (GMT-0500) From: "Serge A. Babkin" <babkin@hq.icb.chel.su> To: terry@cs.weber.edu (Terry Lambert) Cc: freebsd-hackers@FreeBSD.org Subject: Re: large filesystems/multiple disks [RAID] Message-ID: <199504071627.LAA00501@hq.icb.chel.su> In-Reply-To: <9504070445.AA18537@cs.weber.edu> from "Terry Lambert" at Apr 6, 95 10:45:58 pm
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> > like stripping (and decrease for writing unlike it :-( ). But from > > my experience big databases are much more often read than written, > > aren't they ? > > Yes, but I'd expect the agregate performance to stay about the same. My experience isn't big :-) > Large databases don't allow predictive read-ahead because they > typically can't be modelled using a model that assumes locality > of reference. Oops. I throught that database manager can accept multiple requests from clients in parallel and issue multiple parallel requests to the disk subsystem. Is this wrong ? Serge Babkin ! (babkin@hq.icb.chel.su) ! Headquarter of Joint Stock Bank "Chelindbank" ! Chelyabinsk, Russia
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