Invocation of Grid operations in the ViroLab Virtual Laboratory

This paper presents invocation of grid operations within the ViroLab Virtual Laboratory. Virtual laboratory enables users to develop and execute experiments that access computational resources on the Grid exposed via various middleware technologies. An abstraction over the Grid environment is introduced which is based on the concept of grid objects accessible from the experiment script based on Ruby. We describe the Grid Operation Invoker library which is the core of virtual laboratory engine and provides access to heterogeneous computational resources in a uniform manner using pluggable adapters. Sample applications include a script, which implements a data mining scenario using the Weka library and combines Web services with MOCCA technologies.