December 2006
Intermediate to advanced
228 pages
6h 20m
English
book
Introduction to the New Mainframe: Large-Scale Commercial Computing
by Mike Ebbers, Pilar Gonzalez Adrados, Frank Byrne, Rodney Martin, Jon Veilleux
Content preview from Introduction to the New Mainframe: Large-Scale Commercial Computing
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Chapter 5. Availability 103
Traces
System trace
For every interrupt that happens in the operating system, for every I/O event, and
for certain program branch instructions, the operating system writes an entry in
the system trace. The system trace provides a useful overview of all the events
that have happened on the system, and can be invaluable in detecting program
loops. The system trace can be started and stopped, but it generally runs all the
time.
Generalized Trace Facility (GTF)
GTF traces the same type of information as the system trace, but can provide
much more detail. In combination with Serviceability Level Indication Processing
(SLIP), it can be invaluable for debugging system-level problems.
Component trace
A more recent developm
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