z/OS DFSMS Managing Catalogs
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The Message Log for CRURRAP

z/OS DFSMS Managing Catalogs
SC23-6853-00

INTEGRATED CATALOG FORWARD RECOVERY UTILITY R1M0

CRURRAP SYSLOG       12/17/04 (04.351)  10:39:44

The message log from Record Analysis and Processing begins with these lines, identifying first the name, release and modification level numbers of the product writing the reports. The second line identifies the program by name and the DD name being used. The execution date is given in both Gregorian and Julian formats followed by the time at which program execution began.

If there is an error in start up processing, the error will be logged (but no reports are produced). Thus the program uses the log data set to communicate errors in input parameters or input data sets.

Events are logged sequentially as they are encountered. Thus all messages for a given catalog entry will presented sequentially with the newest record first.

The principal use of the log is to determine whether any SMF data has been omitted or lost or is out of sequence. All records for a catalog entry are examined in pairs. If the pair of events could not have happened in that order, a sequence error is recognized. A message is then produced and the records involved are dumped.

If two systems update the same catalog record within the user-specified clock difference interval, a synchronization check is recognized. A message is produced only if the check involves the most current record and both records of the pair are dumped.

When either a sequence error or a synchronization check involves the most current record for an entry, then all events for that entry are analyzed and logged with appropriate messages. The accompanying dumps mean that each record after the newest one will be dumped twice, once for each pair to which it belongs.

The dump will contain the relative addresses on the left side, the storage locations from which the record was dumped, the dumped data in hexadecimal and, on the right side, an EBCDIC interpretation of the dumped data.

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