[CentOS] network copy performance is poor (rsync) - debugging suggestions?

[Gordon Messmer]

On 01/23/2015 10:54 AM, Patrick Flaherty wrote:
>   Not an expert in rsync/ssh, but I'm pretty sure it's ssh's tcp window size
> that is the slowness.

Probably not?  TCP window size is usually only a problem if the sender 
is capable of sending more data than the window size before the receiver 
can ACK.  On low latency networks, it usually isn't a problem.