… it seems that Wowza is performing normally and that your issue is with available bandwidth.
I believe you’re right as I have just tried a couple of iperf tests thus bypassing Wowza settings and Java limitations altogether:
Iperf server/host
c3.8xlarge
Iperf clients
t1.micro = 141 Mbits/sec
c1.medium = 950 Mbits/sec
c3.8xlarge = [B][COLOR="#FF0000"]1.73 Gbits/sec[/COLOR][/B]
The same limit of ~ 1.7 Gbps applies outside of the Wowza enviroment. I found this thread where other users are trying to saturate a 10 GbE, but experience limits of around 3 Gbps. There are mentions of increasing a linux ulimit as well as doing modifications to the network driver. Does it seem likely that it is the same factors that is holding the c3.8xlarge back?