München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 21: Postersitzung

HK 21.89: Poster

Dienstag, 21. März 2006, 15:30–17:00, P

Development of a Grid Access Service and a Web Service Container — •Jan Fiete Grosse-Oetringhaus — Institut fuer Kernphysik Muenster

Two components – the Grid Access Service and a web service container (gContainer) – which have been developed in the context of the AliEn project of the ALICE experiment at CERN are presented.

The upcoming LHC experiments demand a tremendous amount of computing power and storage which will be provided by many institutes. The use of these resources is supported by software based on the concept of Grid. Current Grid software follows a service-oriented architecture and consist of many web services, each responsible for a specific task. This design, which has many advantages for development and deployment, also implies that users have to interact with a set of services to have their tasks fulfilled. This necessitates authentication and communication with several services which may have different access methods. A simplicification is the Grid Access Service which provides a uniform view of the services of the Grid software. It serves as the main entry point to the Grid and deals with all management, communication and security issues. All services of a Grid software have certain qualities in common, like authentication methods, reporting to information systems and load management. The developed web service container (gContainer) provides this functionality. Development of new services can concentrate on the core functionality instead of implementing commonly needed functions over and over again. Furthermore, gContainer also provides service discovery in order to find the most suitable service for a given task.