[Beowulf] posting bonnie++ stats from our cluster: any comments about my I/O performance stats?
rpnabar at gmail.com
Thu Sep 24 22:34:14 EDT 2009
On Thu, Sep 24, 2009 at 9:06 PM, Joe Landman
<landman at 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?
> 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.
> 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.
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