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Archival › Archival of SYSOUT Using the SARSTC Started Task › Archival Generations

Archival Generations

The time interval during which CA View logically archives SYSOUT in a group for reference purposes is defined as a generation. For non-baseyear databases (ARCHCHG=NO), a generation can be defined as the period from one standard backup cycle to the next, because it is the backup cycle that creates a generation. The site has complete control over the beginning and length of time of the generation with the TIME and INTERVAL initialization parameters. For most sites, the interval is 24 hours and comprises the daily production cycle of the site.

For a baseyear database (ARCHCHG=yyyy), a generation is defined as the number of calendar days since the first day of the baseyear specified. For example, if the baseyear is set to 2014 (ARCHCHG=2014), January 1,2014 is considered generation 1, January 2, 2014 is considered generation 2, and so forth.

Note: You can perform interim backups by specifying the NBACKUP initialization parameter. Automatic interim backups are dependent on the standard backup. If no standard backup is performed, TBACKUP=NO, or DAYS=NNNNNN, no interim backups are performed.

You can suppress a backup cycle for any day of the week with the DAYS initialization parameter. For example, assume that the site is "closed" on Sundays, with no operator on hand to mount tapes for the backup cycle. In this case, the site suppresses the automatic backup cycle on Sundays by setting DAYS=YYYYYYN.

You use the NGEND and NGENT initialization parameters, respectively, to specify the number of generations of SYSOUT maintained on disk and the number maintained on tape. For example, to keep three generations of SYSOUT on disk and 90 generations on tape, specify:

NGEND=3
NGENT=90

In this example, CA View retains 90 total generations. In a non-baseyear database, immediately after a job runs, three generations of the job are on disk. The most recent generation resides on disk only and the next two generations reside both on disk and tape. The remaining 87 generations reside on tape only. Immediately after a standard backup cycle, only the two most recent generations reside on disk and tape; the remaining 87 generations reside on tape only. The NGENT value includes the NGEND value.