[Icecast] Unable to utilize past 1 gbps

[zsolt makkai]

Dear Marius,

Our station is Megadanceradio in Hungary.

Our status page for the master server is:
http://45.67.158.93:8000/status.xsl  For the slave:
http://45.67.158.94:8000/status.xsl

We are peaking at around 11.00 am and 13.00 pm in the afternoon.

We have tested extensively the bandwith with speedtest. We tried with iperf
but that did not finish for a long time so we stopped it.

Currently we are load balancing on two 10 gbps dedicated lines. So for now
we are ok, but for the future we do not know for how long it will last.
Currently we are limiting the number of listeners to 5200 on each server so
as not to cripple the system. When we are approaching the bandwidth limit
we are getting loads of timeouts until finally not being able to access
even the status page.

That was our second idea that somewhere in the production chain there is a
limit set but we did not find anything.

Thank you for your help!

Best,

Zsolt

Marius Flage <marius at flage.org> ezt írta (időpont: 2024. márc. 14., Cs,
23:01):

> I don't know if any such limitation exists, but maxing out just shy of
> 1Gbps sounds a bit more like an interface's line speed limited/set to 1Gbps
> somewhere in your production chain? You wrote that you have tested the bw -
> what did you use? Iperf? Speedtest?
>
> Maybe consider scaling with additional Icecast servers and use a load
> balancer in front? And then just scale accordingly? This sounds like an
> interesting challenge. Which radio station is this, if I may ask?
>
> --
> Marius
>
>
> Sendt fra min Galaxy
>
>
> -------- Opprinnelig melding --------
> Fra: zsolt makkai <gvmzsolt at gmail.com>
> Dato: 14.03.2024 22:28 (GMT+01:00)
> Til: icecast at xiph.org
> Emne: [Icecast] Unable to utilize past 1 gbps
>
> Dear Icecast,
>
> We are operating a web radio on a 10 Gbps dedicated server line. The line
> bandwidth is tested and available. The web radio is hosted on a Proxmox
> virtual environment. We own the physical server itself and made sure to
> have allocated the sufficient amount of resources on the virtual machine.
>
> We found that no matter what we do overall upload cannot go over 1 gbps on
> 1 mount point.
> It is not about the maximum number of listeners as a limiting factor but
> the overall bandwidth icecast (we are using 2.4.4) is able to utilize.
>
> We can let more listeners to connect only by decreasing the outgoing
> bitrate that is going against quality.
>
> We have looked at icecast web stations globally and what we have found is
> that NON of them are exceeding the 1 gbps limit. Like servers having
> maximum number of listeners (18000) but using only 48 kbps bitrate which is
> around 900 mbps...
>
> Please advice!
>
> Is this really the limit that one icecast server can utilize/mountpoint?
>
> Please link a server that goes over the 1 gbps limit continuously...
>
> Thank you for your help!
>
> Best Regards,
>
> Zsolt Makkai
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>
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