[Beowulf] how fast can NFS run?
mwill at penguincomputing.com
Wed Feb 1 11:38:14 EST 2006
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)
Bruce Allen wrote:
> I'd like to know the fastest that anyone has seen an NFS server run,
> over either a 10Gb/s ethernet link or a handful of link aggregated
> (channel-bonded) Gb/s ethernet lines.
> This would be with a small number of clients making large file
> sequential reads from the same NFS host/server. Please assume that
> the NFS server has 'infinitely fast' disks.
> I am told by one vendor that "NFS can't run faster than 100MB/sec". I
> don't understand or believe this. If the server's local disks can
> read/write at 300MB/s and the networking can run substantially faster
> than 100 MB/s, I don't see any constraint to faster operation. But
> perhaps someone on this list can provide real-world data (or say why
> it can't work).
> Note: I am free to use modern versions of the NFS protocol, jumbo
> frames, large rsize/wsize, etc.
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