The Gateway system: uniform web based access to remote resources

Exploiting our experience developing the WebFlow system, we designed the Ga teway system to provide seamless and secure access to computational resourc es at ASC MSRC, The Gateway follows our commodity components strategy and i s implemented as a modern three-tier system. Tier 1 is a high-level front-e nd for visual programming, steering, run-time data analysis and visualizati on, built on top of the Web and OO commodity standards. Distributed object- based, scalable, and reusable Web server and Object broker middleware forms Tier 2, Back-end services comprise Tier 3, In particular, access to high-p erformance computational resources is provided by implementing the emerging standard for meta-computing API, Copyright (C) 2000 John Wiley & Sons, Ltd .