The trace directory is a VSAM data set that contains an entry for every trace log data set that is known to the BBI-SS PAS.
The DSN of the directory must be specified in BBPARM member BBIISP00 with the keyword TRDIR=; there is no default. The trace directory is allocated dynamically at BBI-SS PAS start. Trace logging can occur only when a trace directory is allocated successfully.
Trace log data sets are tracked as long as the data sets exist, but entries can be deleted or added to the directory to allow logs to be moved between systems or restored after being archived.
There is no automatic updating of the directory from events outside the BBI-SS PAS system. There is an automated facility that you can use to clean up the trace directory (and associated data sets) and a batch utility to update your directory for data sets that are deleted or archived. For more information on managing the trace directory, see Customizing-the-application-trace-facility.