On Sun, Apr 18, 2010 at 10:33:36PM -0500, Bob Friesenhahn wrote: > Probably the DDRDrive is able to go faster since it should have lower > latency than a FLASH SSD drive. However, it may have some bandwidth > limits on its interface.
It clearly has some. They're just as clearly well in excess of those applicable to a SATA-interface SSD, even a DRAM-based one like the acard. In return, the SATA SSD has some deployment options (in an external JBOD, for example) not as readily accessible to a PCI device. I'd be curious to compare mirroring these kinds of devices across server heads, using comstar and some suitable interconnect, as a comparison to slogs colocated with the drives. -- Dan.
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