GFS Backups Immutability Period

The immutability period for backups with GFS flags depends on multiple settings of a scale-out backup repository. The following table shows how the immutability period is counted depending on the scale-out backup repository configuration.

Scale-Out backup Repository Settings	Performance Tier Immutable	Capacity Tier Immutable	Archive Tier Immutable
Performance Tier Only	The immutability period depends on the settings of an object storage repository: For the entire duration of their retention policy. In this case, the immutability period is the same as the GFS retention period + Block Generation. For the minimum immutability period only. In this case, the immutability period is the same as the immutability period of an object storage repository + Block Generation.	—	—
Performance Tier + Capacity Tier with Copy Policy	The immutability period depends on the settings of an object storage repository: For the entire duration of their retention policy. In this case, the immutability period is the same as the GFS retention period + Block Generation. For the minimum immutability period only. In this case, the immutability period is the same as the immutability period of an object storage repository + Block Generation.	The immutability period is the same as the immutability period of an object storage repository set as the capacity extent.	—
Performance Tier + Capacity Tier with Move Policy	The immutability period is the same as the immutability period of an object storage repository set as the performance extent.	The immutability period is the same as the immutability period of an object storage repository set as the capacity extent.	—
Performance Tier + Capacity Tier with Copy Policy + Archive Tier	The immutability period is the same as the immutability period of an object storage repository set as the performance extent.	The immutability period is the same as the immutability period of an object storage repository set as the capacity extent.	The immutability period is the same as the GFS retention period1.
Performance Tier + Capacity Tier with Move Policy + Archive Tier	The immutability period is the same as the immutability period of an object storage repository set as the performance extent.	The immutability period is the same as the immutability period of an object storage repository set as the capacity extent.	The immutability period is the same as the GFS retention period1.
Performance Tier + Archive Tier	The immutability period is the same as the immutability period of an object storage repository set as the performance extent.	—	The immutability period is the same as the GFS retention period1.

1 Valid only in case the GFS retention period is longer than the immutability period for object storage repository.