Mobile agent model for fault-tolerant objects systems

Application programs are required to be fault-tolerant as well as servers in order to make a system fault-tolerant. There are many discusses on how to make servers fault-tolerant, i.e. replication and checkpointing. Applications are also required to be fault-tolerant in order to realize fault-tolerant systems. In this paper, we take a mobile agent approach to realizing applications on multiple servers. Agents move around servers whose objects are manipulated. In traditional systems, application programs do not work if application servers are faulty. If the server is faulty, the agent finds an-other server where the agent can be performed. In addition, agents are replicated. Replicas of agents can move to servers even if a replica of the agent is faulty. Thus, applications can be fault-tolerant.