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Wowza CPU Performance comparative for Live Streaming sites

The idea of this post is share some technical details about different Wowza servers settings, running into Live Streaming sites.

This 4 years working into multiple projects allow to me recollect stats about performance, currently support more than 100 Wowza Server daily and this list of CPU’s is the common used.

One normal question from my customers are, what server need to buy for my streams?

For this reason into this post I’ll share some metrics and performance graph from multiple servers.

All the server run, with Wowza Media Server 2.2.3 with JDK 1.6.0_XX over Centos 5/6 64 bits.

The list of server for this comparative are: (benchmark from http://www.cpubenchmark.net):

Methodology of the metric recollections:

  • At the moment to take the metrics all the server need to be using 1Gbps during almost 15 minutes (this metrics are based into 30 minutes samples)
  • All need to have similar concurrent users connected (the average is 4610 Concurrent Users into this comparative)

We’ll use 5 metric to compare:

  • CPU Available (Average)
  • JVM Memory Used (Average)
  • Server RAM
  • Load (Average)
  • Connected Users (Average)

Working with Wowza logs


Improve logs management and rotation over linux, combining Log4j and LogRotate.

Modify the log4j.properties for using other Appender:

# Access appender
log4j.appender.serverAccess=org.apache.log4j.RollingFileAppender
log4j.appender.serverAccess.File=${com.wowza.wms.ConfigHome}/logs/wowzamediaserver_access.log
log4j.appender.serverAccess.layout=com.wowza.wms.logging.ECLFPatternLayout
log4j.appender.serverAccess.layout.Fields=date,time,tz,x-event,x-category,x-severity,x-status,x-ctx,x-comment,x-vhost,x-app,x-appinst,x-duration,s-ip,s-port,s-uri,c-ip,c-proto,c-referrer,c-user-agent,c-client-id,cs-bytes,sc-bytes,x-stream-id,x-spos,cs-stream-bytes,sc-stream-bytes,x-sname,x-sname-query,x-file-name,x-file-ext,x-file-size,x-file-length,x-suri,x-suri-stem,x-suri-query,cs-uri-stem,cs-uri-query
log4j.appender.serverAccess.layout.OutputHeader=true
log4j.appender.serverAccess.layout.QuoteFields=false
log4j.appender.serverAccess.layout.Delimeter=tab

Create the logrotate configuration file into Centos/RedHat the path is:

nano /etc/logrotate.d/wowza
/usr/local/WowzaMediaServer/logs/*.log {
       rotate 3
       size=512M
       compress
       copytruncate
       missingok
}

And the last step is you have very big logs files like is my case, and into one day I can have 2 GB of logs or more, move the log rotate for check every hour instead of every day

mv /etc/cron.daily/logrotate /etc/cron.hourly/

Inspired in this post: http://nicerhttpd.blogspot.com/2008/11/logrotate-and-log4j.html

UPDATE:
Other way to work with Wowza logs, can be using external Jar for rotate the logs by Size and Time, this way if you are running into WinOS or don’t like to use LogRotate for this task can have similar functionality

For more details can check the Wowza Forum post: http://www.wowza.com/forums/content.php?263-Logging-How-to-use-TimeAndSizeRollingAppender

How to know what is happening inside Wowza?

I have seen into the Blog stats than the most common question is How To Monitor Wowza Media Server… for this reason I’ll start to write a series of Posts about this topic.

In this first post I’ll request your help too, let me know what you would like to know about your Wowza Server.

Currently the information I consider useful, is:

  • Concurrent Connection (separated by Protocol –  HTTP Cupertino / HTTP Silverlight / RTSP / RTMP)
  • MemoryHeap (the memory used by the JVM)
  • Version (if you have multiple server,it is difficult remember what version you have installed)
  • Bandwidth Traffic (by Vhost, Application or ApplicationInstances)

And here the question… What info would you like to know about Wowza?

Please post into the comment what else you would like to know…

Into the next post, I’ll show examples, graphs and other tips to get this information from the Wowza Server, using JMX protocol.

But here I show a snake peak of the information and the Graph you can have.