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It is because we have mutli web server. --DP --- On Tue, 5/11/10, Richard Pieri <richard.pieri-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> wrote: > From: Richard Pieri <richard.pieri-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> > Subject: Re: Configuration of Raid > To: "Boston Linux and Unix" <discuss-mNDKBlG2WHs at public.gmane.org> > Date: Tuesday, May 11, 2010, 1:59 PM > On May 11, 2010, at 1:41 PM, Dave > Peters wrote: > > > > We have a MD3000i (15 x 450GB 15K rpm) and MD1000 (15 > x 1TB 7.2 RPM) joined together. How many Raid Group and LUN > should I create for the best performance? 15K RPM disk will > be used for Database Server and 7.2 RPM disk group will be > used as Web Server? > > Any suggestion? > > Maximum spindle distribution = maximum performance > (usually), so glom the 15x450GB into a single striped set > (RAID 0) and the 15x1TB into a single striped set (also RAID > 0).? Your reliability will suck.? Each stripe set > has 15 points of failure with zero redundancy. > > For redundancy and performance, I would set up 14 disks > from each set in a RAID 1+0 with 1 hot spare. > > Although... I have to wonder... why do you have 15TB of > disk for your web server but "only" 7TB for your database? > > --Rich P. > > > _______________________________________________ > Discuss mailing list > Discuss-mNDKBlG2WHs at public.gmane.org > http://lists.blu.org/mailman/listinfo/discuss >
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