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Forum Discussion
NFS Tunning? - some benchmarks
I ran some benchmarks to compare various modes of file sharing, and got some surprising results. My intution was that NFS would be the best option, but its performance was off (see below). So do...
Adding more disks speeds things up for all protocols. Going from 2 to 4 disks on my Pro increased sequential read speed by almost 3x (from about 110 MB/s to 319 MB/s). This was the internal speed (measured with Bonnie). Random access also improved, but I didn't save the numbers for that.
Dewdman42 wrote: two disks. But AFP and SMB both out performed NFS for 4k blocks. The protocol must be a limiting factor.
I'm not saying that protocol has no effect. Just that adding disks can have a huge effect.
The main advice I've seen on tuning NFS for random access is to disable read ahead (nfs_server_clread). I suspect that will create poor performance for sequential applications. Being more aggressive with NFS threads might help (why not try 16, and maybe some intermediate values).
I found an old paper here: http://www.columbia.edu/~ra2028/USENIX/ ... ix2004.pdf it might have some useful ideas. Note the claim that many performance issues are due to the NFS client - not the server(I've seen that claim about NFS in other papers).
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