Checkpoint retention schedules

For Instant Recovery storage checkpoints, no data is moved between the client and the media server. Instead, a VxFS Storage Checkpoint is created on the client. For Oracle clients, the file names and directory names are sent to the server for the catalog. In the case of file systems (non-database clients), only the directory name is sent, not the file data.

Changes in the files on the client's primary fileset are reflected in the Storage Checkpoint until the backup policy runs again, creating another Storage Checkpoint. Storage Checkpoints are created and retained until the maximum checkpoints threshold is exceeded, when the oldest checkpoint is removed.

Figure: Instant Recovery Retention Schedule for Storage Checkpoints shows the Instant Recovery checkpoint expiration schedule. If the maximum checkpoint value is set to 2 and a third checkpoint is created, the oldest is removed.

Figure: Instant Recovery Retention Schedule for Storage Checkpoints

A new Storage Checkpoint is created each time a backup is started.