Data cleanup

After the Historical data has been archived, it is eligible for cleanup. The archiveCleanup process deletes all data that has been archived and is older than the Delete Cutoff time specified in the Archive Control dialog box. The date of the most recent deletion is also recorded in the schedule table.

In order to delete data, it must be archived. Therefore, when using the Job Scheduler (JSH) to schedule archiving and cleanup, the former must be performed first. If you do not wish to save the data to an Archive device, then Archive to the null device (NULL).

The Delete Cutoff field entry in the Archive Control dialog box specifies how old data must be before it is deleted. Each entry follows the YY:MM:DD format, where YY specifies how many years must elapse, MM specifies how many months must elapse, and DD specifies how many days must elapse before deletion. The deletion time is calculated with respect to the start of the current day.

To illustrate, if the current time is 05-Feb‑19 14:35 when the archiveCleanup process runs, the Cutoff Specifier causes the archived data to be deleted as shown in the Delete Cutoff sample table below.

Previously deleted data that is subsequently dearchived is not cleaned up automatically by the system.

Note: Delete dearchived data as soon as it is no longer needed; otherwise, it fills up the database and leaves no room for the data that is currently being collected.