Jeff Layton wrote: > Greg Lindahl wrote: >> I was recently surprised to learn that SSD prices are down in the >> $2-$3 per gbyte range. I did a survey of one brand (OCZ) at NexTag >> and it was: >> >> 256 gigs = $700 >> 128 gigs = 300 >> 64 gigs = 180 >> 32 gigs = 70 >> >> Also, Micron is saying that they're going to get into the business of >> PCIe-attached flash, which will give us a second source for what >> Fusion-io is shipping today. >> >> If you're on the "I like a real system disk" side of the >> diskless/diskfull fence, these SSDs ought to be a lot more reliable >> than tradtional disks. And I'd like to get rid of the mirrored >> disks in our developer desktops... >> > > Remember that OCZ does not equal Fusion-IO :) There are many > factors that go into an SSD that determine performance. So the > performance of OCZ is not nearly that of Fusion-IO's product. > > For example, I've been tracking some performance testing of a > wide variety of SSD's and spinning disks in my day job. Some of > the SSD's are fairly inexpensive, but the performance is pretty > pathetic. For example, if your read/write mix includes more than > about 10% writes, then the performance of the SSD's is worse > than a spinning disk (this is in terms of IOPS). > > If you want to move up the food chain and buy some unbelievably > fast SSD's you get can get the performance above spinning disks > but the price is several orders of magnitude greater than spinning > disks.
Yeah, there's a few vendors out there selling battery backed dram solutions. Basically maxing out the interface, but stupidly expensive. >From the benches I've seen, though, it could be a useful accelerator for workloads akin to databases. > Reliability is another question and I posted a quick response to > this list in a different email. This being my big concern with flash. > > Jeff -- Geoffrey D. Jacobs _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
