Using the DAYS keyword
Use the DAYS keyword on the SET DEFAULT or SET command to control the number of 24-hour days of historical data to retain in the repository.
The primary difference between using the DAYS and CYCLES keywords is that DAYS is an absolute number of 24-hour days, while CYCLES is a number of groups of data files (cycles) that contain a complete recoverable VSAM or sequential file.
Set the value of the DAYS keyword to the number (0 through 99999) of days you want to retain.
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