Gransets for managing consistency groups of dispersed storage items

A non-transitory machine readable medium comprising machine executable code which when executed by a machine, causes the machine to:

• maintain a first granset for a set of storage items of a consistency group and a second granset for a set of mirrored storage items maintained as replicas of the set of storage items, the first granset specifying a first access type for the set of storage items and the second granset specifying a second access type for the set of mirrored storage items, wherein identifiers of the set of storage items are mapped to a granset identifier of the first granset;
• negotiating a generation number between a file system layer of a first storage controller and a replication layer used to replicate data of the set of storage items to the set of mirrored storage items, wherein incoming operations labeled with the generation number are executed and incoming operations without the generation number are rejected;
• and
• process operations targeting the set of storage items by filtering operations requesting access different than the first access type that is allowed and processing operations targeting the set of mirrored storage items by filtering operations requesting access different than the second access type that is allowed.

A computing device comprising:

• a memory comprising machine executable code for performing a method;
• and
• a processor coupled to the memory, the processor configured to execute the machine executable code to cause the processor to:
• maintain a first granset for a set of storage items of a consistency group and a second granset for a set of mirrored storage items maintained as replicas of the set of storage items, the first granset specifying a first access type for the set of storage items and the second granset specifying a second access type for the set of mirrored storage items, wherein identifiers of the set of storage items are mapped to a granset identifier of the first granset, wherein the first granset is atomically created with the first access type, a first state, a first fencing property, a first redirection property, and the granset identifier atomically assigned to inodes of storage items within the set of storage items;
• and
• process operations targeting the set of storage items by filtering operations requesting access different than the first access type that is allowed and processing operations targeting the set of mirrored storage items by filtering operations requesting access different than the second access type that is allowed.