NFS: the new millennium

I've seen large throughput improvements by increasing rsize from 1 MB to 16 MB with Oracle dNFS client, towards NFS-Ganesha on top of GPFS (ESS). The ESS does 8+2p erasure coding, with 1 MB strip size, so 16 MB IOs is the optional size. I don't think wsize was as important, since it could buffer up and do full block size writes on server side -- but this large rsize was needed to ensure full block (16MB) reads.

I don't think other NFS clients support larger than 1 MB rsize/wsize, which seems unfortunate for this kind of storage backend.