We have developed ZENTURIO, which is an experiment management system for performance and parameter studies as well as software testing for cluster and Grid architectures. In this paper we describe our experience with developing ZENTURIO as a collection of Web services. A directive-based language called ZEN is used to annotate arbitrary files and specify arbitrary application parameters. An Experiment Generator Web service parses annotated application files and generates appropriate codes for experiments. An Experiment Executor Web service compiles, executes, and monitors experiments on a single or a set of local machines on the Grid. Factory and Registry services are employed to create and register Web services, respectively. An event infrastructure has been customised to support high-level events under ZENTURIO in order to avoid expensive polling and to detect important system and application status information. A graphical user portal allows the user to generate, control, and monitor experiments. We compare our design with the Open Grid Service Architecture (OGSA) and highlight similarities and differences. We report results of using ZENTURIO to conduct performance analysis of a material science code that executes on the Grid under the Globus Grid infrastructure.

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