Distributed System for Query Processing with Grid Authentication

When using Grid resources, usually a specific type of middleware is deployed. For example the European infrastructure is based on EMI-GLite and GLOBUS. The deployment of this middleware enforces a number of limitations concerning the OS, libraries and software packages. On the other hand the typical Grid middleware does not provide elasticity in the way Cloud services do. In our system we propose an entirely Java-based solution designed with elasticity in mind, providing distributed processing of queries from a single endpoint. The system is lightweight and easy to deploy on Cloud resourced and depends only on a few EMI packages. In this paper we describe the architecture and workflow of the system, providing benchmarks which show the effectiveness of our solution during processing of queries related to monitoring computational jobs in the Grid, using a distributed Cassandra database.