Web and database stop briefly, the restored data becomes production. Data written after the target is dropped from the live database.

The previous data directory is kept so you can roll back. A fresh full backup should follow.

Restores the data directory from before the cutover. Anything written since the cutover is lost. The archive now holds the newer timeline, so a fresh full backup must follow.

Green is stopped. Production is untouched.

The restored data directory is kept on disk, so a later Retarget is a fast delta restore.