What hardware are you using? A colleague of mine just spent a few weeks working to get peak performance out of some Dell md3000Is to keep up with the needs of a client of his. Let's call them "an online media company."
My point is that baseline performance is determined so much by the specific hardware, that what works to get an md3k cruising may prove absolutely useless in your setup. Also, the switch is probably a bigger factor in overall speed than one might guess at first... On Oct 30, 2008, at 3:07 PM, Derek J. Balling wrote: > I'm trying to determine what's a good "baseline performance level" for > my iSCSI SAN. We're seeing what we consider to be suboptimal > performance, but I'm not sure where to pin the blame down -- or even > if there IS any blame, maybe our metrics are in line with what people > are getting for Linux iSCSI clients. Who knows. > > What I'm seeing is that - if I use IOMeter as my performance testing > tool (which seems to be fairly common in SAN testing), I can only get > about 300-400 read IOP/s, with total throughput of about 10MB/s. > Contrarily if I let IOmeter test the local disk, it's 6x faster (1900 > IOP/s, 60MB/s) > > Now that SEEMS awful low to us. There's a number of factors that might > be contributing to it (it could be a network issue, it could simply be > that the SAN hardware itself is saturated for IOPS -- I tend towards > that last, but unfortunately, the SAN hardware we're using has > NO(!!!!) means of letting me determine what the current IOPS are on > the SAN disks themselves.... crazy-talk, I tell you). > > Anyone out there want to share their metrics? > > Cheers, > D > > _______________________________________________ > Tech mailing list > [email protected] > http://lopsa.org/cgi-bin/mailman/listinfo/tech > This list provided by the League of Professional System Administrators > http://lopsa.org/ _______________________________________________ Tech mailing list [email protected] http://lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
