On Tue, 20 Mar 2001, Alfred Perlstein wrote:
> Actually, from what I've been told, TCP allows for much larger requests
> than what UDP does, afaik UDP maxes out at 8k while tcp should be able
> to go to 32k (maybe 64k) and give possibly better performance.
This is true. I'm used to working with nfs transaction sizes of < 500
bytes.
> Plus each time you 'hickup' under a UDP mount it's a lot more painful
> because since it's possible for each RPC to be broken into several
> packets you have a lot more retransmition to do.
Yup. This is why a reliable (switched) LAN is needed.
> However, as the manpages and sysadmin books say, NFS tuning is a
> black art and results under various setting may vary wildly.
It's very application specific which is why no single formula works.
Reading up on the subject is definitely required.
-gordon
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