Workflow Support in a GRACCE Metascheduling Architecture

Modeling a complex application in grid environments concerns about how to describe application modules, data sets and module relationships so that an application can be seamlessly integrated with grid middlewares. In this paper, we present a high-level abstract language for domain scientists to model distributed applications. GAMDL describes the dataflow structures of domain complex problems and allows control logics to be defined within dataflow using conditioned properties and conditioned pipes. GAMDL is intuitive and very easy to use for users without knowledge of grid computing and the use of multiple-value property makes GAMDL much more powerful than other languages to describe similar application entities. Also, driven and used by a production application, GAMDL serves as a basis for the integration between a grid metascheduler and workflow systems in GRACCE project.