these challenges requires more emphasis on concepts that were previously of secondary importance, including migratability, adaptivity, and runtime system introspection. In this paper, we leverage our experience with these concepts to demonstrate their applicability and efficacy for real world applications. Using

-grain sharing of objects, and collaboration. CORBA does not support fine-grain objects and their sharing by different clients. We show how graphics applications can benefit from an underlying support for fine-grain objects and large-grain objects. We also show that object migration, and migration of objects

alternative to conventional asynchronous communication protocols. The facility also ensures that the processes belonging to a fault-tolerant process group will observe consistent orderings of events affecting the group as a whole, including process failures, recoveries, migration, and dynamic changes to group

In this paper, we describe a design for an object-oriented, interprocess communications subsystem that supports the migration of communication endpoints. All communication is connection-oriented and occurs between two endpoints, represented by Interface Objects (IObjs). A full-duplex connection

boger @ informatik.uni-hamburg.de

Many new paradigms of parallel programming have emerged that compete with and complement the standard and well-established MPI model. Most notable, and successful, among these are models that support some form of global address space. At the same time, approaches based on migratable objects (also

this paper have come to light during our work on the PerDiS project. (ESPRIT<E-425> Basic Research Project No. 22533). For the purposes of the workshop we have re-stated the problems in a<E-461> more general way in terms of migrating objects.<E-178> The context of this work is a

fragmentation, whereas the second and third algorithms both lead to flocking. A systematic method is provided for construction of cost functions (or collective potentials) for flocking. These collective potentials penalize deviation from a class of lattice-shape objects called αlattices. We use a multi

be substantially enhanced by a parallel programming model called migratable objects. In this paper, we demonstrate how the migratable-objects model facilitates and improves several fault tolerance approaches. Our experimental results on thousands of cores suggest fault tolerance schemes based on migratable objects

) application progress in the presence of failing processes. The submission also explains how overdecomposed, message-driven, migratable objects enhance the clarity of expression of parallel programs and also enable the runtime system to deliver portable performance. Our codesize (line counts) and a summary