Load balancing in the SOAJA web service platform

The aim of the service oriented adaptative Java applications (SOAJA) project is to develop a service-oriented infrastructure, which enables efficient running of Java applications in complex, networked computing Grid environments. The SOAJA environment provides components and services for static and dynamic load balancing based on Java object observation. SOAJA can be used to design large scale computing tasks to be executed based on idle time of processor nodes. Java distributed applications consist of parallel objects which SOAJA allocates to Grid nodes at runtime. In this paper, we present mechanisms and algorithms for automatic placement and adaptation of application objects, in response to evolution of resource availability. These mechanisms enable to control the granularity data processing and distribution of the application on the Grid platform.