A Scalable Durable Grid Event Service

It is interesting to study the system and software architecture of environments, which integrate the evolving ideas of computational grids, distributed objects, web services, peer-to-peer networks and message oriented middleware. Such peer-to-peer (P2P) Grids should seamlessly integrate users to themselves and to resources, which are also linked to each other. We can abstract such environments as a distributed system of “clients” which consist either of “users ” or “resources ” or proxies thereto. These clients must be linked together in a flexible fault tolerant efficient high performance fashion. In this paper, we study the messaging or event system – termed GES or the Grid Event Service-- that is appropriate to link the clients (both users and resources of course) together. For our purposes (registering, transporting and discovering information), events are just messages – typically with time stamps. The messaging system GES must scale over a wide variety of devices – from hand held computers at one end to high performance computers and sensors at the other extreme. We hav