I have a very different experience with NFS: we are using Gigabit Ethernet, and 
a 64bit RHEL6 clone with ECC memory as a file server; it has RAID1 ext4 home 
directories and RAID6 ext4 for synchrotron data. We have had zero performance 
or reliability problems with this in a computer lab with ~ 10 workstations, and 
I have seen 115 MB/sec file transfers via NFS, at peak times. 
Just make sure to export using the "async" option.

HTH,

Kay

On Wed, 31 Jul 2013 09:21:48 +0900, Francois Berenger <[email protected]> wrote:

>Be careful that running data intensive jobs over NFS
>is super slow (at least an order of magnitude compared
>to writing things on a local disk).
>Not only the computation is slow, but you may be slowing down
>all other users of the cluster too...
>
>F.

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