Granular consistency group replication

A non-transitory machine readable medium having stored thereon instructions for performing a method comprising machine executable code which when executed by at least one machine, causes the machine to:

• create a consistency group relationship for a consistency group to specify a subset of a first volume hosted by a first storage controller;
• generate a baseline snapshot of the consistency group utilizing the consistency group relationship;
• perform a baseline transfer of data of the consistency group, using the baseline snapshot, to a second volume hosted by a second storage controller to create a replicated consistency group within the second volume, the consistency group relationship specifying that the replicated consistency group of the second volume is a backup of the consistency group of the first volume;
• and
• responsive to the consistency group having an asynchronous replication relationship with the replicated consistency group:
• create a current snapshot of the first volume;
• compare the current snapshot with a last snapshot, used to mirror data from the first volume to the second volume, to identify a delta of the consistency group between the current snapshot and the last snapshot;
• and
• mirror the delta from the first storage controller to the second storage controller for updating the replicated consistency group.

A computing device comprising:

• a memory containing machine readable medium comprising machine executable code having stored thereon instructions for performing a method of granular replication for data protection;
• and
• a processor coupled to the memory, the processor configured to execute the machine executable code to cause the processor to:
• create a consistency group relationship for a consistency group comprising a subset of a first volume hosted by a first storage controller;
• generate a baseline snapshot of the consistency group utilizing the consistency group relationship;
• perform a baseline transfer of data of the consistency group, using the baseline snapshot, to a second volume hosted by a second storage controller to create a replicated consistency group within the second volume, the consistency group relationship specifying that the replicated consistency group of the second volume is a backup of the consistency group of the first volume;
• responsive to the consistency group having an asynchronous replication relationship with the replicated consistency group:
• create a current snapshot of the first volume;
• compare the current snapshot with a last snapshot, used to mirror data from the first volume to the second volume, to identify a delta of the consistency group between the current snapshot and the last snapshot;
• and
• mirror the delta from the first storage controller to the second storage controller for updating the replicated consistency group;
• and
• responsive to the consistency group having a synchronous replication relationship with the replicated consistency group:
• perform one or more incremental transfers of data from the consistency group to the replicated consistency group utilizing the consistency group relationship;
• and
• responsive to completing the one or more incremental transfers, cut over to a synchronous replication engine for synchronously replicating operations, targeting the consistency group, to the replicated consistency group before acknowledging back to clients.