Treffer: Homeless Replicated Objects

dJVM is a distributed Java Virtual Machine (JVM) which provides a Single System Image of a cluster. Performance improvements are key to the development of the dJVM project. Object placement together with load balancing decisions can improve the performance of the dJVM by hiding the effects of network latencies. Object placement has predominately been considered using a single instance of written object. We propose a system that is able to maintain multiple write enabled copies and explain how this allows a more flexible consideration of the way in which objects are represented on the cluster. This paper describes our design and the implications this has on correct object placement, latencies and load