Date: Thu, 6 Apr 95 22:45:58 MDT From: terry@cs.weber.edu (Terry Lambert) To: babkin@hq.icb.chel.su (Serge A. Babkin) Cc: freebsd-hackers@FreeBSD.org Subject: Re: large filesystems/multiple disks [RAID] Message-ID: <9504070445.AA18537@cs.weber.edu> In-Reply-To: <199504071321.IAA00249@hq.icb.chel.su> from "Serge A. Babkin" at Apr 7, 95 08:21:30 am
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> Yes. But mirroring gives additional throughput increase for reading > 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. Large databases don't allow predictive read-ahead because they typically can't be modelled using a model that assumes locality of reference. Unless your cache is significantly large relative to your database. Terry Lambert terry@cs.weber.edu --- Any opinions in this posting are my own and not those of my present or previous employers.
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