Code migration control in large scale loosely coupled distributed systems

Large scale loosely coupled PCs can organize a cluster and form the grid computing on sharing each processing power; power of PCs, code migration and transaction distribution characterize the performance of distributed systems. This paper describes object code migration control mechanism in large scale loosely coupled distributed systems. The prototype of the middleware which migrates object code for computing is implemented, and the tradeoff of code migration was observed. Based on these experiments, several simulations for large scale loosely coupled PC clusters were performed, and the methodology to control code migration to have stable response time in the system is derived. The mechanism for object code migration is proposed based on the results of the simulations. The result will be applied to design the grid computing systems and mobile systems to maintain the proper performance.