Quorum-based replication of objects

We discuss a novel object-based locking (OBL) protocol to lock replicated objects by extending the traditional quorum-based protocols to objects with abstract methods. If a pair of methods op₁ and op₂ are compatible, the summation of the quorum numbers of op₁ and op₂ is not larger than the number of replicas in the OBL protocol. We propose, for the first time, a version vector to identify what methods are performed on a replica. The replicas exchange compatible methods using the version vector