Icecast - Aug 2004 - final question: how many mountpoints can icecast handle ?

Hi everyone

I have one final question regarding my 
diploma work. As it seems, the hardware performance 
seems not to be the bottleneck when streaming out 
ONE stream to x clients.

What happens when I use instead of ONE stream 
different streams, because my concept is an on-demand 
radio station that basically provides everyone with 
access to a huge library of music files and lets him 
create an own playlist that will be played only for him..
so if there is 1000 concurrent users, can there be 1000 
different mount points - and will it still work ?

thanks for sharing your experience, really helps me out !

Andrew

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Hi Jack

thanks a lot for the inside information about the mountpoints.

So what you're saying is that I need for my project when 
doing with icecast 1.x

- per 25-50 concurrent users one single server

So problem is, if I wanted to handle, say 1000 streams,
I would need 200 Servers..this puts the concept a bit 
in jeopardy because that would push the cost of the service 
into astronomical..in comparison to handling, as I had planned 
until now, 500 individual streams per server.

So I guess I'll have to wait until Icecast 2 for doing 
a real prototype of this.

Just so that I get this right - if I have 1000 different on-demand 
streams (its on-demand radio from huge mp3-library for users) 
mountpoints are definitly the way to go, yes ? Or am I on the woodpath ?

Thanks a lot

Andrew
> -----Ursprungliche Nachricht-----
> Von: Jack Moffitt [mailto:jack@xiph.org]
> Gesendet: Mittwoch, 7. November 2001 00:08
> An: Andreas Gunzenhauser
> Cc: icecast@xiph.org
> Betreff: Re: [icecast] final question: how many mountpoints 
> can icecast
> handle ?
> 
> 
> > What happens when I use instead of ONE stream 
> > different streams, because my concept is an on-demand 
> > radio station that basically provides everyone with 
> > access to a huge library of music files and lets him 
> > create an own playlist that will be played only for him..
> > so if there is 1000 concurrent users, can there be 1000 
> > different mount points - and will it still work ?
> 
> Theoretically you can use as many mountpoints as you want.
> Unfortunately, some of the locking in icecast 1.x isn't very 
> well done,
> and this causes problems in specifically this instance (of 
> large numbers
> of mountpoints).
> 
> Practical testing of icecast under these conditions revealed 
> that 25-50
> mount points is reasonable, but much more starts to get 
> dicey.  > 100 is
> almost totally usuable.
> 
> This won't be as big of an issue in icecast2 since the 
> locking was more
> well thought out this time through.  I hope to make the mountpoints a
> nonissue, as the number of clients currently are.
> 
> 25-50 should be enough for even hardcore use,  and if you 
> need more (as
> we did.  we were doing 450+ streams), it's easy enough to split them
> over multiple icecast servers with each server handling 25-50 streams.
> 
> jack.
> 
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> What happens when I use instead of ONE stream 
> different streams, because my concept is an on-demand 
> radio station that basically provides everyone with 
> access to a huge library of music files and lets him 
> create an own playlist that will be played only for him..
> so if there is 1000 concurrent users, can there be 1000 
> different mount points - and will it still work ?
Theoretically you can use as many mountpoints as you want.
Unfortunately, some of the locking in icecast 1.x isn't very well done,
and this causes problems in specifically this instance (of large numbers
of mountpoints).

Practical testing of icecast under these conditions revealed that 25-50
mount points is reasonable, but much more starts to get dicey.  > 100 is
almost totally usuable.

This won't be as big of an issue in icecast2 since the locking was more
well thought out this time through.  I hope to make the mountpoints a
nonissue, as the number of clients currently are.

25-50 should be enough for even hardcore use,  and if you need more (as
we did.  we were doing 450+ streams), it's easy enough to split them
over multiple icecast servers with each server handling 25-50 streams.

jack.

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On Tue, Nov 06, 2001 at 04:08:19PM -0700, Jack Moffitt wrote:
> 25-50 should be enough for even hardcore use,  and if you need more (as
> we did.  we were doing 450+ streams), it's easy enough to split them
> over multiple icecast servers with each server handling 25-50 streams.
Just curiouse did you run more than 1 icecastserver/box? and if so did
you run them on diffrent ports?


-- 
Venlig hilsen/Kind regards
Thomas Kirk
ARKENA
thomas(at)arkena(dot)com
http://www.arkena.com

Why use Windows, since there is a door?
(By fachat@galileo.rhein-neckar.de, Andre Fachat)

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