Diagnostics
The following tools are used to assist in DELTA IMS VIRTUAL TERMINAL problem determination and resolution:
- Virtual terminal trace facility
- IMS system log tapes
- File select print utility (DFSERA10)
- IMS dispatcher trace facility
The virtual terminal Trace facility consists of three elements. The first is the trace table which consists of entries located in extended private virtual storage. The second is a macro interface that generates standard trace table entries and/or specific event entries. The third element is a callable routine that allocates trace table entries with integrity in a multiprocessor environment, initializes entries with an ID and time stamp, and if a CLB address is provided, produces the standard trace entry.
The IMS system log tapes, file select print utility, and dispatcher trace facility are used by BMC Software Customer Support to diagnose problems when IMS abends or is suspected to be in a loop or wait state.