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Tudor Davies
Tudor is a techie turned manager who fights like mad to keep his tech skills honed and relevant. Everything from web hosting, networking, *nix and the like. Constantly developing and co-ordinating with others to make the web a better (and easier to use) place.
Thursday, 16th Dec 2010
Posted @ 10:46
So after playing around with the NAS and doing some NFS tuning, I can present its performance stats:
Write - 14.7MB/s
Read - 20.7MB/s
The PCI bus should give me 133MB/s throughput and the GigE card should give me 125MB/s (theoretically as with all the framing and packet overheads it wont ever be that high)
All the drives are on UDMA/100 controllers, so should be capable of 100MB/s throughput (burst) and the drives all have an average sustained data rate of 78MB/s. So the best I could get out of the whole scenario is 78MB/s
So why am I not getting 78MB/s across the network?
The limiting factor here is most certainly the processing power of the MaxAttach 4300. When doing the transfers, the CPU hits and stays at 100%. A faster processor would most certainly reap better throughput.
However, the max CPU that motherboard can take is a P3-1Ghz which by my calculation would give me a max read of 23.4MB/s and Im not sure that the hassle factor would be worth it.
Moving to a P4 2.4Ghz might be though as that should be able to satisfy a GigE link...
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