[Beowulf] how fast can NFS run?
ballen at gravity.phys.uwm.edu
Wed Feb 1 10:18:07 PST 2006
> spec.org has a benchmark that is nfs-specific but it does not give you MB/s
> for a special access pattern.
> Instead, it gives you operations per second as well as response time at
> that load for a mix of different access patterns, filesizes between 1K
> and 1M.
Can you tell me *roughly* how to translate this number into MB/sec? I
understand that it's a mixed load of requests with different sizes and
access patterns; still my question makes sense.
I can see that on an SGI system that *should* be limited by its network
connection (1 Gb/sec) the benchmark give around 13,000. So I would guess
that ~100 MB/sec corresponds to a SPECsfs97_R1.v3 (NFS version 3)
benchmark score of around 13,000.
Similarly, I see that on an IBM system with 12 gigabit ethernet ports, the
benchmark is around 118,000, which would correspond to around 900 MB/sec.
Michael, do these MB/s numbers look roughly right to you? In other words
that SPECsfs97_R1.v3 (NFS version 3) of 13,000 is around 100 MB/s?
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