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Archiving

Unlimited Log Information

Archiving enables z/OS users to archive unlimited log information to tape at runtime. The runtime system writes log records to the first log file. When the file is full, the runtime system writes to the second log file and archives the first log file to tape. When the second log file is full, the runtime system writes to the first log file and the second log file is archived, and so forth.

When Archiving is not Requested

If archiving is not requested, the runtime system performs log file wraparound. Up to two log files can be allocated for an application. If both are full, the runtime system overwrites the log records already written, starting at the beginning of the first log file.