Patent ID: 8209393

Claim:
A method of maintaining a replication table in a multiple computer system, the method comprising: providing a plurality of computers each including a local processor and a local updateable memory coupled with the local processor including a first computer and a second computer interconnected via a communications link or network operating in a replicated shared memory arrangement, classifying the updateable memory locations or values of said updateable memories into a first category of updateable memory locations each of which is replicated on two or more of said multiple computers and a second category of updateable memory locations each of which is present only in the specific one of said multiple computers in which each said second category updateable memory location is physically located, and maintaining a replication table listing or recording the ones of said multiple computers on which a said first category updateable memory location is replicated, wherein all memory reads are satisfied locally in each of the plurality of computers by reading replicated updateable memory locations present in each independent local memory of each computer of the plurality of computers.