Recent trends in Grid Computing indicate that the standardization of the Grid programming model and associated management services is still under progress. The Open Grid Services Architecture(OGSA) represents an evolution towards a Grid system architecture based on Web services. OGSA compliant, higher-level functions are beginning to be implemented. Therefore, GARUDA has adopted a pragmatic approach for using existing Grid infrastructure and Web Services technologies. The deployment of grid tools and services for GARUDA will be based on a judicious mix of in-house developed components, the Globus Toolkit (GT) and industry grade components. The Foundation phase GARUDA will be based on stable version of GT4.

The resource management and scheduling in GARUDA is based on a deployment of industry grade schedulers in a hierarchical architecture. At the cluster level, scheduling is achieved through Load Leveler for AIX platforms and Torque for Linux clusters. At the Grid level, the Moab scheduler from Cluster Resources interfaces with the various cluster level schedulers to transparently map user requests onto available resources in the Grid. Moab supports advanced features including intelligent data staging, co-allocation and multi-sourcing, service monitoring and management, sovereignty (local vs. central management policies), virtual private cluster and virtual private grid. Moab interfaces with Globus for data and user management, job staging and security.