On Wed, Apr 22, 2009 at 4:57 PM, Carl Hensler <[email protected]> wrote:
> You can do a bit better with InfiniBand and NFS/RDMA. We are getting over > 1 GB/s across the IB wire writing to the OpenSolaris NFS server and ZFS when > the data is going into RAM. It's the rotating rust that slows things down. > Anything going to ram is going to be faster. Latency of DDR memory is probably at most 100ns vs .5ms for a SSD. Problem is if you need full-sync nfs, you bound by the latency of the non-volatile path. Even a 32kB packet over 10GbE will take 0.025ms. Nicholas
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