Parallel migration of multiple consistency groups in a storage system

A system comprising:

• a processor;
• and
• memory storing computer program code that when executed on the processor causes the processor to execute a data migration between at least one source device and at least one target device in a storage system operable to perform the operations of:
• replicating one or more consistency groups from at least one source device to at least one target device in a storage system by:
• performing an asynchronous data replication operation from the at least one source device to the at least one target device;
• and
• performing one or more synchronous data replication operations from the at least one source device to the at least one target device if data stored on the at least one source device is changed;
• operating the consistency groups on the at least one source device and the at least one target device in an active-active mode, wherein the at least one source device is active and accessible by one or more host devices, and the at least one target device is active and accessible by one or more host devices;
• determining one or more replicated consistency groups to include in a cutover operation;
• and
• performing the cutover operation by deactivating the at least one source device associated with the included consistency groups.

A computer program product including a non-transitory computer readable storage medium having computer program code encoded thereon that when executed on a processor of a computer causes the computer to execute a data migration process between at least one source device and at least one target device in a storage system, the computer program product comprising:

• computer program code for replicating one or more consistency groups from at least one source device to at least one target device in a storage system by:
• performing an asynchronous data replication operation from the at least one source device to the at least one target device;
• and
• performing one or more synchronous data replication operations from the at least one source device to the at least one target device if data stored on the at least one source device is changed;
• computer program code for operating the consistency groups on the at least one source device and the at least one target device in an active-active mode, wherein the at least one source device is active and accessible by one or more host devices, and the at least one target device is active and accessible by one or more host devices;
• computer program code for determining one or more replicated consistency groups to include in a cutover operation;
• and
• computer program code for performing the cutover operation by deactivating the at least one source device associated with the included consistency groups.