[Beowulf] SSD caching for parallel file systems

Sabuj Pattanayek sabujp at gmail.com
Fri Feb 8 07:12:59 PST 2013


On Fri, Feb 8, 2013 at 12:36 AM, Jonathan Aquilina
<eagles051387 at gmail.com> wrote:
> What kind of ssd's are we talking about here I have seen OCS has pci-express
> ones or are we talking about standard sata SSD's. Is there that much of a
> performance difference between pci-e and sata based ssd's in terms of
> performance be it caching or otherwise.

Yes, latency and bandwidth per device. The PCI-E SSD cards can do more
than 2GB/s, some claim nearly 3GB/s and the latency of the bus is
going to be microsecond or sub-microsecond. So you get higher IOPS per
device.


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