All objects you are saving reach a checkpoint at the same time. The server then saves them to the media. IBM® strongly recommends that you use full synchronization, even when you are saving objects in only one library. It will usually complete checkpoint processing in the least amount of time, and it has the least impact to your recovery procedures. Because it allocates all objects you are saving before obtaining a checkpoint image of them, it will usually keep objects locked longer than other options. This option will also use the most additional storage.