> > What is the MTU set on your NICs? If it is 1500 (the default) a 4KB transfer
> > will have to be divided in four TCP packets and re-assembled on the target 
> > side.
> > This increases the amount of work that the TCP stack has to perform.
> > 
> Hmm.. I'm using read-ahead values from 128 kB (256) to 2 MB (4096).. so all 
> of the
> read-ahead values will cause many TCP packets anyway.. ?

Duh! Thougt the packets were in bytes, not in MBs. 

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