AW: [icecast] how many streams can icecast handle ?

Andreas Gunzenhauser andrew at baselbiet.ch
Sun Nov 4 08:44:44 PST 2001



Thanks Bill !

I see ;-) soo cpu power is not the bottleneck - but available bandwidth is.

ok here's one scenario:

lets say my provider here in Switzerland would connect me to
his hosting center, which has the following bandwidths:

- 155 Mbit ATM Network internally
  (so anyone logging on to the provider directly is not the problem,
   there should be enough bandwidth)

- Peerings to other ISP's of - as he writes - 200 MBit
  -> so this should be enough for, let's say, 2000 streams

Could one single machine handle that ? Or is my calculation at all wrong ?

thanks, the information is most appreciated, as it's just 2 weeks
until I have to hand in my diploma work ;-)

best regrads

andrew

> -----Ursprüngliche Nachricht-----
> Von: owner-icecast at xiph.org [mailto:owner-icecast at xiph.org]Im Auftrag
> von William Goldsmith
> Gesendet: Sonntag, 4. November 2001 17:35
> An: icecast at xiph.org
> Betreff: Re: [icecast] how many streams can icecast handle ?
>
>
> The simple answer is:  way more than your Internet connection
> will support
> :-)
>
> The server consumes very little in the way of resources. Your outgoing
> bandwidth will almost certainly be the limiting factor. Just
> divide your
> available bandwidth by the bitrate of your stream (& lop off
> about 5% of
> that number for overhead & a safety margin) .
>
> Example:  a T1 line = 1.54 mbps = 1540 kbps / 24kbps (stream
> bitrate) = 64
> streams
>
> So a T-1 line can support 64 24kbps streams (in theory). In
> practice, about
> 60
>
> -bg
>
>
> > hi everyone
> >
> > For my diploma work on streaming music, I'm looking into
> > cost of handling a large amount of users.
> >
> > Somehow I couldnt find some experience on the net about
> > how many concurrent streams a single box could handle
> > using icecast (without encoding, just the streaming
> > of pre-encoded mp3-files).
> >
> > Does anybody have some experience that I could include
> > as a reference point ?
> >
> > Thanks !
> >
> > Andrew
> >
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