Distributed and Parallel Systems: From Cluster to Grid Computing, is an edited volume based on DAPSYS 2006, the 6th Austrian-Hungarian Workshop on Distributed and Parallel Systems, which is dedicated to all aspects of distributed and parallel computing. The workshop was held in conjunction with the 2nd Austrian Grid Symposium in Innsbruck, Austria in September 2006. This book is designed for a professional audience composed of practitioners and researchers in industry. It is also suitable for advanced-level students in computer science.

Preface.- Program Committee and Additional Reviewers.- Parallel and Distributed Algorithms.- The Wandering Token: Congestion Avoidance of a Shared Resource.- A Locality Optimizing Algorithm for Developing Stream Programs in Imagine.- Granular SSOR Preconditioning Placed on Dynamic SMP Clusters with Communication on the Fly.- Bulk Synchronous Parallel ML with Exceptions.- Networking and Communication.- A New Approach to MPI Collective Communication Implementations.- Supporting MPI Applications in P-GRADE Portal.- Tuned: An Open MPI Collective Communications Component.- Self-Healing Network for Scalable Fault Tolerant Runtime Environments.- Supporting Seamless Remote I/O Using a Parallel NetCDF Interface.- Grid and Web Services.- Generating Semantic Descriptions of Web and Grid Services.- Legacy Code Support for Service-Oriented Production Grids.- Client-Side Task Support in Matlab for Concurrent Distributed Execution.- Message Level Security for Grid Services Using S/Mime.- Grid Infrastructure.- Fault Tolerant Grid Registry.- Secure Application Deployment in the Hierarchical Local Desktop Grid.- Designing Distributed Mediator Component for the C-GMA Monitoring Architecture.- User Oriented Grid Testing.- Advanced Grid Techniques.- Application and Middleware Transparent Checkpointing with TCKPT on Clustergrid.- UML based Grid Workflow Modeling under ASKALON.- A Taxonomy of Grid Resource Brokers.- Towards an Agent Integrated Speculative Scheduling Service.- Index.