Design and implementation of transactional agent

A Transactional Agent (TA) is a mobile agent to manipulate objects with some type of commitment condition. For example, a transactional agent commits only if at least one object could be successfully manipulated in the at-least-one condition. Computers may stop by fault while networks are assumed to be reliable. In the Client-Server (CS) model, servers can be fault-tolerant according to traditional replication and checkpointing technologies. However, an application program cannot be performed if a client computer is faulty. An application program can be performed on another operational computer even if a computer is faulty in the transactional agent model. There are kinds of faulty computers for a transactional agent, current, destination, and sibling computers where a transactional agent now exist, will move, and has visited, respectively. We discuss how the transactional agent can be tolerant of the types of computer faults.