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NetBackup considers the failure history of a policy to determine whether or not to run a scheduled backup job. The property sets the timeframe for NetBackup to examine.
This property determines the following characteristics for each policy:
How many preceding hours NetBackup examines to determine whether to allow another backup attempt (retry). By default, NetBackup examines the past 12 hours.
How many times a backup can be retried within that timeframe. By default, NetBackup allows two attempts. Attempts include the scheduled backups that start automatically or the scheduled backups that are user-initiated.
Consider the following example scenario using the default setting 2 tries every 12 hours:
At 11:00 P.M., NetBackup looks at the previous 12 hours. NetBackup sees one attempt at 6:00 P.M. and one attempt at 8:00 P.M. The setting of two has been met so NetBackup does not try again.
At 6:30 A.M. the next morning, NetBackup looks at the previous 12 hours. NetBackup sees only one attempt at 8:00 P.M. The setting of two has not been met so NetBackup tries again. If a schedule window is not open at this time, NetBackup waits until a window is open.