[Beowulf] how fast can NFS run?

[Craig Tierney]

Bruce Allen wrote:
>> I have seen 200MB/s over infiniband. Needless to say I was not overly 
>> impressed, expecting more something in the 800-900MB/s
>> range. (pci-x bottlenecked infiniband)
> 
> 
> PCI-X should be 133 MHz x 8 bytes = 1034 MB/s.  Any idea why it 
> bottlenecked at 200?

I am suprised it is that low, but it is because of TCP/IP overhead.
IB can max out around 850 MB/s when using a more native transport
that TCP/IP.

Craig


> 
> Cheers,
>     Bruce
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