A highly decentralized implementation model for the programmer-transparent coordination (PTC) scheme for cooperative recovery

The authors present an implementation model for the programmer-transparent coordination (PTC) scheme that fits well with local-area-network-(LAN-) based systems equipped with broadcasting channels. The model is a significant improvement over the earlier formulated implementation guidelines for developing LAN-based fault-tolerant distributed computer systems (DCSs). The model uses a highly decentralized broadcasting-based approach to the execution of PTC functions. The result is a significant reduction in the PTC-related message traffic, and the extent of reduction could be drastic in many application environments. Another major element of the model is a three-layer software structure in which distributed cooperating application processes and PTC-related operating system components are incorporated in modular forms amenable to cost-effective concurrent processing.<>