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Icecast 100Mbit/s problem

 
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JohnnyOh



Joined: 10 Feb 2009
Posts: 50
Location: Germany

PostPosted: Tue Mar 30, 2010 10:27 am    Post subject: Icecast 100Mbit/s problem Reply with quote

Hi together,

I am facing some weird behavior on icecast 2.3.2.

I have several Icecast servers streanming an amount of mp3-streams. Unfortunately the icecast servers are not able to deliver more than 100 Mbit/s.

Below you will find an extract of my icecast.xml:

Code:


<?xml version="1.0" encoding="UTF-8"?>
<icecast>
  <limits>
    <clients>2500</clients>
    <sources>200</sources>
    <threadpool>250</threadpool>
    <queue-size>524288</queue-size>
    <client-timeout>30</client-timeout>
    <header-timeout>15</header-timeout>
    <source-timeout>10</source-timeout>
    <!-- If enabled, this will provide a burst of data when a client
             first connects, thereby significantly reducing the startup
             time for listeners that do substantial buffering. However,
             it also significantly increases latency between the source
             client and listening client.  For low-latency setups, you
             might want to disable this. -->
    <burst-on-connect>1</burst-on-connect>
    <!-- same as burst-on-connect, but this allows for being more
             specific on how much to burst. Most people won't need to
             change from the default 64k. Applies to all mountpoints  -->
    <burst-size>65535</burst-size>
  </limits>
  <authentication>
    <!-- Sources log in with username 'source' -->
    <source-password>hackme</source-password>
    <!-- Relays log in username 'relay' -->
    <relay-password>hackme</relay-password>
    <!-- Admin logs in with the username given below -->
    <admin-user>admin</admin-user>
    <admin-password>hackme</admin-password>
  </authentication>
  <!-- set the mountpoint for a shoutcast source to use, the default if not
         specified is /stream but you can change it here if an alternative is
         wanted or an extension is required
    <shoutcast-mount>/live.nsv</shoutcast-mount>
    -->
  <!-- Uncomment this if you want directory listings -->
  <!--
    <directory>
        <yp-url-timeout>15</yp-url-timeout>
        <yp-url>http://dir.xiph.org/cgi-bin/yp-cgi</yp-url>
    </directory>
     -->
  <!-- This is the hostname other people will use to connect to your server.
    It affects mainly the urls generated by Icecast for playlists and yp
    listings. -->
  <hostname>localhost</hostname>
  <!-- You may have multiple <listener> elements -->
  <listen-socket>
    <port>80</port>
    <!-- <bind-address>127.0.0.1</bind-address> -->
    <!-- <shoutcast-mount>/stream</shoutcast-mount> -->
  </listen-socket>
  <!--
    <listen-socket>
        <port>8001</port>
    </listen-socket>
    -->
  <!--<master-server>127.0.0.1</master-server>-->
  <!--<master-server-port>8001</master-server-port>-->
  <!--<master-update-interval>120</master-update-interval>-->
  <!--<master-password>hackme</master-password>-->
  <!-- setting this makes all relays on-demand unless overridden, this is
         useful for master relays which do not have <relay> definitions here.
         The default is 0 -->
  <!--<relays-on-demand>1</relays-on-demand>-->
  <!--
    <relay>
        <server>127.0.0.1</server>
        <port>8001</port>
        <mount>/example.ogg</mount>
        <local-mount>/different.ogg</local-mount>
        <on-demand>0</on-demand>

        <relay-shoutcast-metadata>0</relay-shoutcast-metadata>
    </relay>
    -->


I tested the network connection. The servers are able to deliver 1 GBit/s. It seems that Icecast is the limiting factor. There are no limitation defined for the relays or connections.

Could you please tell me what I have to configure that the servers are able to deliver 1 GBit/s or more?

Kind regards

Johnny
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karlH
Code Warrior
Code Warrior


Joined: 13 Jun 2005
Posts: 5476
Location: UK

PostPosted: Tue Mar 30, 2010 2:01 pm    Post subject: Reply with quote

There's no bandwidth limiting within 2.3.2. What can you tell us about the test setup, home many streams, how many clients, is this on win32? is the CPU being max'd out etc

karl.
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JohnnyOh



Joined: 10 Feb 2009
Posts: 50
Location: Germany

PostPosted: Wed Mar 31, 2010 8:26 am    Post subject: Reply with quote

Hi Karl,

thank you for your reply.
I am using icecast on debian based systems (some etch, some lenny).

This is the output of top on one of the systems:

Code:


top - 11:34:52 up 7 days, 14:50,  1 user,  load average: 0.17, 0.06, 0.02
Tasks:  73 total,   1 running,  72 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.3%us,  0.9%sy,  0.0%ni, 97.3%id,  0.0%wa,  0.3%hi,  1.1%si,  0.0%st
Mem:   3632160k total,  2076796k used,  1555364k free,   171684k buffers
Swap:  8691156k total,        0k used,  8691156k free,  1709476k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 1610 nobody    15   0 77728  20m 2052 S    5  0.6 407:27.50 icecast



there are no other processes running which could affect a high network or cpu load.
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als



Joined: 14 Oct 2008
Posts: 18

PostPosted: Fri May 28, 2010 3:23 pm    Post subject: Reply with quote

We have >1 year icecast running at ~ 150 Mbit on vps (xen) with Debian 4.0
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m3gab0y



Joined: 15 Aug 2009
Posts: 47
Location: London, UK

PostPosted: Tue Jun 01, 2010 2:04 pm    Post subject: Reply with quote

This is really strange. I run a few huge icecast servers on private peering network with 10+k of listeners at peak times and no problems so far.
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gimlioak



Joined: 21 Apr 2010
Posts: 13

PostPosted: Mon Jun 14, 2010 9:34 am    Post subject: Reply with quote

Hello,

No prob here using icecast on 1Gbps connection. It's running smooth. I'm using Debian 5 and Ubuntu 9.04.

HTH

Jef
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JohnnyOh



Joined: 10 Feb 2009
Posts: 50
Location: Germany

PostPosted: Wed Jul 14, 2010 1:41 pm    Post subject: Reply with quote

Now everything works fine. I did a reinstall and everything worked fine. I have no idea what the reason for this problem was.
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