[Beowulf] Need recommendation for a new 512 core Linux cluster

[Mark Hahn]

> welcome) nfs-4.1 protocol support for supporting clients that don't have
> to know the details of the distributed magic at work.

so far, my understanding is that pnfs lets a naive client work transparently
only by routing the IO through the metadata server.  parallel-aware
clients will distinguish between the MDS and content servers, and 
can carry on parallel IO direct to the latter.

-mark
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