A backup window may begin in one day and end in another. If a policy is scheduled to run each day, NetBackup does not run the job again immediately after midnight. Instead, even though the window spans into another day, NetBackup considers it to be one window. NetBackup recognizes that the administrator's intention is usually not to have a job run again so soon after the previous backup.
If a policy is scheduled to run each day, NetBackup looks to see if another window opens later in the day. If another window is set up to open later, NetBackup waits and runs the job then.
If no other window is scheduled to open later in the day, NetBackup does not wait. If the job has a daily frequency, the job runs again after midnight to meet the daily backup frequency requirement.
See How NetBackup determines which schedule to run next.
More Information
Events that cause the schedules to be recalculated