Wow, this is really useful stuff to Amazon related users, including myself.
Keep it up, all tests are really productive.
Thanks for sharing it.
> Hi everyone, I just wanna share results and discuss about some things.
> Thanks to Andrei Sochirca and JUV RTMP LoadTester tool I tested red5
> deployed on a tomcat6 and want to share the results:
> The test suite was:
> Small EC2 instance: Ubuntu 9.10 + tomcat 6, using open-jdk.6, accessing
> oflaDemo from red5 0.8 war
> Running the mentioned tool on another instance (3 agents + 1 coordinator)
> The agents get as much as they can from the streaming server, so getting the
> watchmen_vp6.flv video, that usually needs from 40Kbyte/s - 50Kbytes/s got
> on each connection a speed of 110-130 KBytes/s,
> The top connections stablished were 82 (average of 70) as the agents
> terminate the connections (when they get the complete file) and try to
> establish new ones.
> The nice thing is that process only needed like 60 MBytes avg of extra RAM
> that when is not streaming. And the procesor % was 30avg (27-33).
> So my conclusion is small instances can handle more process but the
> bandwidth is not enough.
> Small instances can handle 160 concurrent connections on a 512kbps video
> file aprox, but it gets laggy
> Maybe, just maybe, the BW limit is on the aws LAN, as the 2 instances were
> communicating with their private IP's (is this assertion true???)
> Next thing, i'm gonna test the same things on a large instance i hope large
> instances come with a better bandwidth limit, if the limit is the same, then
> I'll try to reserve a public IP and do the same test.
> Another weird thing that I found is that when I was evaluating the RTMP vs
> RTMPT, on a stream of 18Mbytes aprox, the difference on total traffic for
> the RTMP=20.28Mbytes and RTMPT = 25.22. is a difference of 4.9 Mbytes,
> thats a lot I think, the tunneling technique overheads a lot the payload.
> Also the RTMP gets a lot of malformed rtmp packages, maybe because of the
> custom RTMP especification. Gonna try too with FSM and check if some
> packages are tagged like that.
> ----------------------------------------------------------
> José Leonardo Diaz Ordoñez
> Ingeniero en Electrónica y Telecomunicaciones
> Énfasis en Ingeniería Telemática.
> Universidad del Cauca, Popayán -Colombia
> 2007
