On 02/09/2013 01:22 PM, Vincent Diepeveen wrote: > SATA is very bad protocol for SSD's. > > SSD's allows perfectly parallel stores and writes, SATA doesn't. > So SATA really limits the SSD's true performance.
SSDs and controllers often support NCQ which allows multiple outstanding requests. Not sure if that fits the definition of "perfectly parallel", but it does allow for outstanding requests to be answered in the order of the devices choosing. In fact the higher IOP rates would be impossible without it. Note how the latency for a single IOP is much higher than peak 1 second / (peak IOPs). _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
