Lock controller and method to implement buffer lock utilizing remote direct memory access

Abstract

A lock controller is connected to a primary lock server having a primary memory to implement a primary ring buffer lock and a secondary lock server having a secondary memory to implement a mirrored primary ring buffer lock. The lock controller sends a first lock request and first read request to the primary lock server and receives a first order. Further, the lock controller sends a second lock request and a second read request to the secondary lock server and receives a second order. Further, the lock controller compares the first and second order, and if the second order differs from the first order, then sends a reorder request to the secondary lock server indicating the first order, so that the execution order of lock requests can be maintained. The disclosed lock controller ensures low latency and efficiently handles a server failure.