1. 1 Grid Systems: What is needed from Web Service standards? ICSOC Panel November 16 2004 Geoffrey Fox Computer Science, Informatics, Physics Pervasive Technology Laboratories Indiana University Bloomington IN 47401 gcf@indiana.edu http://www.infomall.orghttp://www.infomall.org http://www.grid2002.orghttp://www.grid2002.org

2. 2 Panelists Andrew Grimshaw, University of Virginia, and founder and CTO of Avaki.com, and one of the architects of OGSA or the Open Grid Service Architecture Steven Newhouse, Deputy Director, Open Middleware Infrastructure Institute, University of Southampton (part of the UK e-science programme) Jeffrey Frey, IBM Distinguished Engineer, OnDemand System Architecture and Design

3. 3 Backdrop Not perhaps agreement on “What is a Grid” Perhaps community (this panel) would agree that service oriented architectures and their current major implementation Web Services critical Some disagreement as to Scale of Grids Intra-Grids versus Inter-Grids (supporting virtual organizations) Department, Enterprise versus multi-Enterprise Not entirely clear how Grid Services will be produced, specified and standardized Software producers (Globus, EGEE, OMII, Commercial Vendors) versus “Standards/Community” organizations

4. 4 Some Grid Definitions Supporting human decision making with a network of at least four large computers, perhaps six or eight small computers, and a great assortment of disc files and magnetic tape units - not to mention remote consoles and teletype stations - all churning away. (Licklider 1960) Coordinated resource sharing and problem solving in dynamic multi-institutional virtual organizations Infrastructure that will provide us with the ability to dynamically link together resources as an ensemble to support the execution of large-scale, resource-intensive, and distributed applications. Internet Scale Distributed Computers and Services Realizing thirty year dream of science fiction writers that have spun yarns featuring worldwide networks of interconnected computers that behave as a single entity.

5. 5 Questions for Panel What are Requirements for Grid Services that are different from Web Services? What Grid Services (or Web services essential to Grids) are needed at a) "Infrastructure" level such as WSRM and WSRF b) Higher level such as data and job management What Grid services need to be standardized and a) When is a realistic time this might happen b) What process should be used to set standards c) What stakeholders need to be involved in process Any other topic of relevance that is important

6. 6 Question/Answer Session WS-Naming was discussed What about use of publish/subscribe messaging models with “topics” as “address”? What about anonymity? The use of URN and URI for WS-Naming was discussed – good possibility with additional restrictions What about UDDI? Too static Why don’t organizations (W3C, OASIS, GGF, DMTF, EGA) get better coordinated? They are/should Is complexity better managed by a simple framework (leaving details to non standard application logic) or by specifying complexity?