Mobile agent model for distributed systems

Application programs on application servers issue requests to object servers in traditional database systems. On the other hand, programs named agents move around object servers whose objects are manipulated objects in a mobile agent approach. If an agent conflicts with other agents on an object server, the agents negotiate with each other to resolve the confliction. An agent moves to another servers. In traditional systems, application programs do not work if application servers are faulty. If the server is faulty, the agent find another server where the agent can be performed. In addition, agents are replicated if agents may be faulty. In the mobile agent approach, applications can be operational even if a computer where an agent exist is faulty. In this paper, we discuss how to perform agents with different constraints on multiple object servers in the presence of servers and agent faults.