The Snapshot-based Incremental or Faster Incremental backup feature in PowerScale enables OneFS to compare the snapshot from a prior successful backup to the snapshot taken for the current backup. This comparison quickly finds changes without the need for a lengthy tree walk of the targeted directory structure. This process can greatly improve backup times when the data change rate is low and can be used without activating the SnapshotIQ license on the PowerScale cluster.
Commvault has integrated with this feature, and it is also enabled by default on NDMP backups of an PowerScale cluster. This feature is often quite useful, though it can be disabled if the change rate is too high to realize the benefits.