This topic explains what concurrent copy is and how it works, and describes the hardware and software requirements necessary to use concurrent copy.
Concurrent copy is a storage subsystem extended function that allows you to generate a copy or a dump of data while applications are updating that data. Other tools are available that allow you to dump databases while applications continue to update the databases. Concurrent copy, however, provides a copy of the data, in a consistent form, as it existed before the updates took place. Concurrent copy relies on cached storage subsystem Licensed Internal Code (LIC) and enhanced components of z/OS.