Session 3 - Grid Workflow Chairman & Rapporteur: Thierry Priol Thierry.Priol@inria.fr

1. Session 3 - Grid Workflow Chairman & Rapporteur: Thierry Priol Thierry.Priol@inria.fr

2. Objectives • GRID workflow describes patterns of interaction among computations and services in the area of scientific and business computing • A very active field not only in GRID • How to find its way in the Workflow jungle ? • Many approaches to express workflow • Languages (XML-based or not) • GUI & UML-based tools • Petri-net models • Pi-calculus • Unconventional approaches • See what it is going on both in China and Europe European and Chinese Cooperation on Grid Beijing – 7 to 9 February 2007

3. Talks • « Advanced Services for Scientific Workflows » • by Thomas Fahringer, University of Innsbruck • « VINCA GRID Workflow System » • By Li Houfu, ICT • « Decision Services in the frame of Quality of Service » • By Dimosthenis Kyriazis, NTUA • « AVLAB in Scientific network environment » • By Yongzhen Ma - CNIC European and Chinese Cooperation on Grid Beijing – 7 to 9 February 2007

4. Notes during the presentation • Thomas • Simulation of flooding of the Danube with the Grid • Complex application dynamically constructed from services • Description of Askalon: application development and runtime environment for the Grid • Include a GUI based on UML that generates an AGWL • Data distribution among activities à la HPF • Deployment of activities on demand in an automatic way • Scalability experiments • A Grid environment for Interactive Gaming • Dynamic workflow • Questions • Dynamic workflow with Askalon • Scalability of the graphical tool ? • Why having so many workflow systems ? • Differences between BPEL and AGWL • Composition of AGWL workflows ? • Data distribution with irregular patterns • Deployment based on the workflow ? European and Chinese Cooperation on Grid Beijing – 7 to 9 February 2007

5. Notes during the presentation • Zhan Liyong • Workflow in CNGRID as an end-user oriented service composing system • For service-oriented applications • In CNGRID: BPEL and JSDL • Not yet another workflow system but to aggregate and incorporate heterogeneous workflow systems: a meta-workflow system • A 4-layers: Workflow resource layer, workflow capability Description layer, Workflow capability abstraction layer, abstract workflow definition layer • VINCA: workflow modeler, meta-workflow console, portal, executing environment • Case studies: virtual labs in scientific computing, Business computing for Transportation management • Questions • If I understood, VINCA replace BPEL ? • What is the VINCA workflow language ? European and Chinese Cooperation on Grid Beijing – 7 to 9 February 2007

6. Notes during the presentation • Dimosthenis • Workflow models: abstract (task) & concrete (task bound to resources) • Questions: • QoS annotations: where in the workflow ? European and Chinese Cooperation on Grid Beijing – 7 to 9 February 2007

7. Notes during the presentation • Yongzhen • AVLAB with CNIC and 3 Astronomical observatories • Enable remote access to astronomical resources distributed over China • A portal has been set-up to apply and access telescope remotely • 100 users of AVLAB • Collaborative observation (co-scheduling) • Questions • Workflow for astronomical applications: coupling processing and observation European and Chinese Cooperation on Grid Beijing – 7 to 9 February 2007