[Icecast] Icecast2 Server Load tests

David Saunders abitar.com at gmail.com
Sun Apr 29 14:51:04 UTC 2007


  I have done massive testing on our ervers to see how much bandwith
we can really handle..  The server them selfs work very well, we run 4
linux boxes for out streaming. Each on there own cable line who clame
10/2. MB

We use voice quality strems 24k mono streams..  We can get about
110-120  streams goign from the servers before they start deniing
access..  We decied to trhodle the main server at 80 clients and the
slaves at 100.  and useing a balancing program i delveloped to force
the redirect before it get to the server.  (I found some players did
not follow the slave chain reliable enough).  So i wrote a routing
program that did a load balancing act o nll the servers.

How I ran the test was using a a http get to to streams and dumped
them to the bit bucket.  And I monitored the bandwith from them the
server, the server report  about 1.8MB xfer rate at the time the
cable/modem/router started to balk on us.

Honestly only way you can know the real bandwidth is to test it. I
found out a T1 that we were going to get was not really a T1 but a
fractal one, and when we cmplained they said they could not do
anyhitng about it so we droped them.

I have foudn the icecast server to be a solid server for audio
streaming. We currently dabbing into video streaming and the court is
still out of that..


On 4/4/07, Chet Sapino <csapino at twcny.rr.com> wrote:
> Hello:
> Ed Zaleski ran some remarkable and very impressive load tests on icecast
> reported on www.icecast.org (Home page). What wasn't mentioned in the test
> specifications was the type of internet line that was used which totally
> influences bandwidth and subesequent overall load characteristics.
> Questions:
> 1. Was it a T1 line, Verizon FIOS,  or cable internet, or what?
> 2. What were the download/upload bandwidths in MBPS?
> 3. Or was this an offline simulation with no real listeners just testing CPU
> load?
> I am using Time Warner cable internet at 10/0.8 MBPS bandwidth and am
> wondering how this translates to server load streaming mp3's at 128kbps.
> I.e., how many listeneers can I connect without breakup.
> Right now I am thinking switching to Verizon FIOS which runs at 30/5 MBPS
> TIA,
> Chet
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