On Thu, Sep 24, 2009 at 9:06 PM, Joe Landman <land...@scalableinformatics.com> wrote: > Best way to get IOPs data in a "standard" manner is to run the type of test > that generates 8k random reads.
THanks again Joe! I'll run that one. Got to figure out the exact command line. Bonnie is complicated. > I've found fio (http://freshmeat.net/projects/fio/) to be an excellent > testing tool for disk systems. Ok, I have fio. Actually downloaded that after reading some of your comments on your blog. :) Unfortunately the things a beast. Couldn't figure out how to use it. And I really didn't want to do a PhD on disk I/O. Thanks much for your recipie. I am going to try that now. > It looks like channel bonding isn't helping you much. Is your server No? From which numbers? > channel bonded? Clients? Both? Both. >> > Heh ... depends on the vendor. We are pretty open and free with our numbers > (to our current/prospective customers), and our test cases. True. I shouldn't generalize. But most vendors still. I wish they'd scrap all their "whitepapers". Vendor whitepapers (to me) seem the kind of document that strives to attain the minimum information density. Probably a good reading for the clueless non-technical guys sitting in top-management. Give me quantitative benchmarks or spec sheets any day! (Ok, ok, I am probably venting here; but talking knowledgably with vendors has been hard!) > > What RAID adapter and drives? I am assuming some sort of Dell unit. Correct. A Dell Power Connect with an internal RAID card and drives. >What is > the connection from the server to the network Three channel bonded eth connections. >... single gigabit (ala Rocks > clusters), or 10 GbE, or channel bonded gigabit? Nope. No 10 Gig E on this cluster. -- Rahul _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
