Modeling fault-tolerant mobile agent execution as a sequence of agreement problems

Complete Analysis of Fault Tolerance Schemes in Mobile Agents for a Reliable Mobile Agent Computation

“…When a worker fails, one of participants is elected as a new worker and takes over the action of the previous worker. To provide the exactly once property of a mobile agent execution, voting and agreement protocols are needed at each stage [7,3].In a multi-region mobile agent computing environment, places within a stage can be located in the same or different regions [7].…”

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

“…Reliable execution of a mobile agent is to guarantee the exactly-once execution of an agent even in case of a system failure [11]. Many fault-tolerance schemes for the mobile agent system have been proposed and they are categorized into the replication schemes [3,7,8,11] and the checkpointing schemes [2,10,12] .…”

FATOMAS-a fault-tolerant mobile agent system based on the agent-dependent approach

“…This is related to the fact that we assume a system model in which failure detection is unreliable. The solution presented in [8] …”

“…To ensure the exactlyonce execution property, SRB schemes need to solve an agreement problem. Current SRB schemes assume reliable failure detection [5], are based on complex models [2,9,11], or block even on a single place failure [9,11] (see [8] for an in-depth discussion). Our approach, which is based on an easily understandable model, does not assume reliable failure detection and prevents blocking.…”

“…However, undoing the effects of duplicate agents at the end of the execution is not simple, and often limits dramatically the overall system throughput. In contrast to these different approaches, we have presented in an earlier paper [8] an approach that ensures the exactly-once execution property using a very simple principle: the mobile agent execution is modeled as a sequence of agreement problems. In the current paper, we present FATOMAS, a Java-based FAult-TOlerant Mobile Agent System, that implements this approach.…”