Efficient program composition on Parix by the Ensemble methodology

A message passing program composition methodology, called Ensemble, applied for Parix is presented. Ensemble overcomes the implementation problems and complexities in developing applications in message passing environments. Parallel applications are virtually specified by Process Communication Graphs (PCGs) annotated with communication information for Parix processes. Annotated PCGs are generated from application scripts by supporting tools. Reusable Parix executable components are defined from which all processes are created. A universal Parix program loader interprets the annotated PCGs creating the application processes from the reusable components and establishing their communication dependencies. Ensemble is applied to compose variations of Parix applications using the same reusable components. The methodology has been applied for PVM