DATA COPY SYSTEM APPARATUS AND METHOD

摘要

An apparatus, system, and method are disclosed for copying data. The present invention includes a data storage subsystem that supports fast replication and a host system that communicates a fast replication request to the data storage subsystem, estimates an expected wait time for a pending fast replication operation if the fast replication request is not granted, awaits the expiration of the wait time, communicates an additional fast replication request to the data storage subsystem, and records the data as moved if the additional fast replication is granted. In certain embodiments, the host system moves the data via conventional I/O operations if the expected wait time exceeds an expected duration for the conventional I/O operations.