IBM has just published a very cool 33,000 IOPS SPC-1 benchmark result for the DS8000 using 96 x SATA and 16 x SSDs (not a FC drive in sight!) and with a max latency well under 5ms.
I’m impressed. This is a great piece of engineering.
Easy Tier was left to automatically learn the SPC-1 benchmark and respond (again, automatically). I won’t waffle on about it, but will just show you the graph of the various results seeing as the doc I took this from doesn’t say IBM Confidential anywhere : )
I guess what we’d all like to see now is a significant drop in the cost of SSDs. I’m sure it’s coming.
Barry Whyte is on record as saying that Easy Tier will makes its way into SAN Volume Controller later this year. XIV does something vaguely analogous using distributed caches. Storage is fun!