Hey guys.  Any tips on server config settings to be able to handle large amount of listeners.?

I found this online via SomaFM suggested.  Looks like he is still using shoutcast v1. I have 2.2.1 and made these changes...

From director of SomaFM

"Some notes on sc_serv v1 - you should be able to get 5000 concurrents on a decent box with no problem. You'll need to do some tuning possibly, a big issue is making sure your ulimit is set correctly. Here are some notes I have on tuning Ubuntu for sc_serv with lots of capacity:

verify that the following are all set to the default value of 1; this command will show the results:

/sbin/sysctl net.ipv4.tcp_window_scaling
/sbin/sysctl net.ipv4.tcp_timestamps
/sbin/sysctl net.ipv4.tcp_sack

We add the following to /etc/sysctl.conf :

#sc_serv tuning for sysctl.conf:

net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_sack = 1
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_synack_retries = 2
fs.file-max = 798200
net.ipv4.tcp_fin_timeout=25
net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.ipv4.tcp_rmem=4096 87380 16777216
net.ipv4.tcp_wmem=4096 87380 16777216
fs.file-max=798200


Then run sysctl -p to load those changed values.

#Increase the ulimit for maximum open files
#Add this to /etc/security/limits.conf

shoutcast hard nofile 10240
shoutcast soft nofile 10240
root hard nofile 10240
root soft nofile 10240

###In /etc/pam.d/su add or uncomment the line
session required pam_limits.so

These should be similar for other Linuxes.

Note that you can see a really high load on a sc_serv box and it will still stream OK.

FYI- We use Intel E3-1230 V2 CPUs in our streaming servers. You should also make sure you have a motherboard with a good ethernet chipset. We're using Supermicro SYS-5017C-LF boxes which have Intel LAN controllers. "


previously I had a issue with my setup.  I got 350 concurrent listeners and my shoutcast shutdown.  Turns out my ulimit was 1024.  So I changed that to 10240 and also did the above config settings.  (I think they override your regular ulimit config file?)

anyway anyone here run a box that has a lot of concurrent listeners?  Any tips you can give on certain settings?  I learned the hard way that setting the listener amount in centovacast does not do any good if your system settings are not configed properly.

I need this information too.

Anybody has tried it?

GroovinMind, have you contacted with SomaFM?

best!