MODELLING A RELIABLE DISTRIBUTED SYSTEM BASED ON THE MANAGEMENT OF REPLICATION PROCESSES

In the modern economy, the benefits of Web services are significant because they facilitates the automation of activities in Internet distributed businesses and also the cooperation between organizations. The interconnection of processes running in different computer systems is now possible by using Web services. This paper presents a model for a reliable distributed system and its development stages. This paper describes the communication between the system processes, based on the message exchange, and also presents the distributed agreement among processes. For the fault-tolerant systems a list of objectives is defined and, further, a framework model for distributed systems is proposed. This system framework makes distinction between management operations and execution operations. The proposed model promotes the use of a central process especially designed for the coordination and control of other processes. This model of a reliable distributed system could be used as a platform for many models of distributed systems, based on the management of replication processes.