International Conference on Computer Systems and Technologies- CompSysTech’07 Some Models of a Distributed Database Management System with Data Replication

Abstract: The article suggests a formal model of Distributed Database Management Systems (DDBMS) and an approach for Distributed Database Systems (DDB) modeling. It is suggested to use general purpose system simulation (GPSS) for simulation modeling. Queuing systems models modelling the execution of two-phase locking (2PL) in DDB with Data replication are suggested: centralized 2PL, primary copy 2PL, distributed 2PL and voting 2PL. Results from the simulation of the distributed 2PL are presented