ICENI II

The Imperial College e-Science Networked Infrastructure (ICENI) has been developed by the London e-Science Centre for over four years. ICENI has prototyped many novel ideas for providing an end to end Grid middleware. This has included: service-oriented architecture, component programming model, retaining and using metadata collected throughout the life-cycle of an application, and scheduling algorithms which are aware of workflow and performance data. In this paper we describe the evolution of ICENI into ICENI II in which we maintain the original good ideas on which ICENI was designed, but decompose the system into more autonomous tool sets which can be composed in an a-la-carte fashion. Thus allowing Grid developers to select only those components which are relevant for their work. We re-focus ICENI on the provision of and end-to-end pipeline when these tool sets are composed together and the higher level services required to make the Grid useful to the end user