Streaming Media Supplement sa2150 and sa2250

101
This chapter describes how Media-IXT logs, and allows you to monitor some statistics about, streaming
media transactions.
This chapter covers these topics:
• “Logging Media-IXT traffic” below
• “Understanding log collation” on page 103
• “RealNetworks logging” on page 104
• “WMT logging” on page 106
• “QuickTime Logging” on page 107
• “Transaction logging fields” on page 108
• “Transaction logging fields: table and illustrated examples” on page 109
• “Monitoring Media-IXT traffic” on page 114
Logging Media-IXT traffic
Media-IXT logs information about each transaction that it processes. By default, Media-IXT creates two log
files, which reside in the logs directory in Traffic Server’s base directory.
The default Media-IXT log files are:
• summary-mixt.log, an abbreviated log, useful when you need an overview of streaming media traffic
behavior
• complete-mixt.log, which includes almost all of the information which Media-IXT logs about
streaming media traffic
Media-IXT’s log files are not in Squid logging format, because as streaming media has evolved, it has become
clear that Squid logging format is not adequate for logging streaming media transactions. Squid logging is
inherited from the early days of proxy servers, and does not provide much, if any, meaningful information about
streaming media traffic.
Media-IXT’s log files are custom log files, configured by editing logs_xml.config, which resides in
Media-IXT’s config directory.
Media-IXT’s log files were created to meet the needs of the protocols RealNetworks, WMT, and QuickTime
use for streaming media, which normally do not include HTTP. Traffic Server continues to log HTTP
transactions in Squid format, in the squid.log file. squid.log resides in the Traffic Server logging
directory. See the HP Cache Server Appliance Administrator Guide for details.
If what you need is somewhere in between the summary and the complete log files, you can create your own
custom log files by editing logs_xml.config
.
Consult a reference work about XML if you have questions
about editing this file.
Media-IXT’s default behavior can be altered by changing the value of the separate_mixt_logs
configuration variable in records.config. Here are the values for
s
eparate_mixt_logs, and their
effects:
10 Logging and Monitoring
Value Effect
-1 disable all Squid-format logging for Media-IXT; this is the default setting
0 put Squid-format log entries for Media-IXT in squid.log (if Squid logging is enabled)
1 put Squid-format log entries for Media-IXT in squid-mixt.log (if Squid logging is enabled)