You can add an automatic synthetic full backup schedule to a specific backup set or subclient.
Note
You can also add an automatic synthetic full backup schedule to a schedule policy, which will apply to all jobs associated with the schedule policy.
About Automatic Synthetic Full Backup Schedules
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A full backup job and subsequent incremental backup jobs or differential backup jobs must exist before a synthetic full backup job can run. For information about how synthetic full backups are created, see Synthetic Full Backups.
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The system will not run a synthetic full backup job if no incremental or differential backups were run after the last full or synthetic full backup.
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The automatic synthetic full backup schedule will trigger a synthetic full backup job if any of the following conditions are met:
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Run Synthetic Full backups every X days: The number of days that should pass between automatic synthetic full backups.
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Run Synthetic Full - As needed for extended retention: The number of days that should pass between synthetic full backup jobs based on the storage policy’s retention rules defined by the user.
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Run Synthetic Full - As needed to reclaim space: Automatically triggers a synthetic full backup job to reclaim space from backed up media.
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The automatic synthetic full schedule is based on the most recently run full or synthetic full backup. The minimum time period between the most recently run backup and a new backup (that is, a backup that is triggered by an automatic schedule) is 7 days.
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If an automatic synthetic full backup job fails, the next attempt happens after 24 hours.
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If a manual synthetic full backup job is run for subclients associated with an automatic schedule, the schedule is skipped and the next job runs based on the value in the Run Synthetic Full backups every X days option, the Run Synthetic Full - As needed for extended retention option, or the Run Synthetic Full - As needed to reclaim space option.
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An automatic synthetic full backup schedule can’t be configured to run on a specific day/time of the week/month/year, as the schedule is triggered instead based on the three criteria mentioned above. Therefore, if there is a need to run a synthetic full backup on a specific day/time of the week/month/year (for example, on the last day of every month), then you should run a fixed time synthetic full backup schedule (that is, Daily, Weekly, Monthly, or Yearly).
Note
In case of snap backups, if you are trying to consolidate the data on a given date of the month, then we recommend using a fixed time full snap backup schedule instead of a fixed time synthetic full backup schedule. This will ensure that the backup copy that follows this snap backup contains all required data.
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For Run Synthetic Full - As needed for extended retention:, we consider retention settings from all copies and select the least number of days from the following:
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Basic retention rules, which can be found in CommCell Console > Storage Policy > Storage Policy Copy > Properties > Retention.
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Extended retention rules, which can be found in CommCell Console > Storage Policy > Storage Policy Copy > Properties > Retention.
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Selective copy to automatically select full backups at a frequency that can be found in CommCell Console > Storage Policy > Properties > Selective Copy.
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Even if extended retention rules are configured and set to retain full backups that are less than 7 days (for example, All Full backups, Hourly Full backups or Daily Full backups), the synthetic full backup jobs will run every 7 days, since the time period between two automatic synthetic full backup jobs can't be less than 7 days.
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Run Synthetic Full - As needed to reclaim space applies only to file system and VMs, and all of the following conditions must be met:
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The current application size is greater than or equal to 1 GB.
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The sum of the sizes of the backup jobs in the current cycle is greater than or equal to 1 GB.
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The sum of the sizes of the backup jobs in the current cycle is greater than the current application size by more than 50%.
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Procedure
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From the CommCell Browser, expand Client Computers > client > agent.
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Select the entity where the automatic schedule will be created:
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To add the automatic schedule to a backup set, right-click the backup_set, and then click All Tasks > Backup All Subclients.
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To add the automatic schedule to a subclient, click the backup_set, right-click the subclient, and then click Backup.
The Backup Options dialog appears.
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On the Backup Options tab under Select Backup Type, select Synthetic Full.
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Optional: To run an incremental backup before or after the synthetic full backup, select Run Incremental Backup, and then select one of the following:
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To run an incremental backup before the synthetic backup, select Before Synthetic Full.
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To run an incremental backup after the synthetic backup, select After Synthetic Full.
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Under Job Initiation, select Schedule, and then click Configure.
The Schedule Details dialog appears.
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In the Schedule Name box, enter a unique name for the schedule.
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On the Synthetic Full sub-tab, in Run Synthetic Full - Every X days, define the number of days that should pass between automatic synthetic full backups.
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Click OK.
To view the jobs that are associated with the backup set or the subclient, see Viewing Job Schedules.