Lazy Agent Replication and Asynchronous Consensus for the Fault-Tolerant Mobile Agent System

摘要

In this paper, we propose a low overhead replication scheme for the fault-tolerant mobile agent system. In the proposed lazy replication scheme, execution of a primary agent and migration of its replicas are concurrently processed. Also, the primary agent performs asynchronous consensus with fixed consensus agents so that the consensus step and the replica migration step can concurrently be processed. As a result, the primary agent should not wait for the completion of the replica migration step unless any of the consensus agents fails. The proposed scheme has been implemented on top of the Aglet system and its performance has been measured.