[Beowulf] SSD caching for parallel file systems

Jonathan Aquilina eagles051387 at gmail.com
Fri Feb 8 07:49:53 PST 2013


Is there a large price difference?


On Fri, Feb 8, 2013 at 4:12 PM, Sabuj Pattanayek <sabujp at gmail.com> wrote:

> 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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-- 
Jonathan Aquilina
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