Grids, P2P and Services Computing, the 12th volume of the CoreGRID series, is based on the CoreGrid ERCIM Working Group Workshop on Grids, P2P and Service Computing in Conjunction with EuroPar 2009. The workshop took place August 24th, 2009 in Delft, The Netherlands.

CoreGRID brings together a critical mass of well-established researchers worldwide, from forty-two institutions active in the fields of Peer to Peer Computing, Distributed Systems and Middleware, Programming Models, Algorithms, Tools and Environments

XtreemOS: a Sound Foundation for Cloud Infrastructure and Federations.- Towards a Grid File System Based on a Large-Scale BLOB Management Service.- Improving the Dependability of Grids via Short-Term Failure Predictions.- Distributed Data Mining using a Public Resource Computing Framework.- Integration of the ProActive Suite and the semantic-oriented monitoring tool SemMon.- An Experimental Evaluation of the DQ-DHT Algorithm in a Grid Information Service.- Reducing traffic in DHT-based discovery protocols for dynamic resources.- Autonomic management of multiple non-functional concerns in behavioural skeletons.- Decision Models for Resource Aggregation in Peer-to-Peer Architectures.- Mapping Workflows on Grid Resources: Experiments with the Montage Workflow.- A Proposal on Enhancing XACML with Continuous Usage Control Features.- Self-* and Adaptive Mechanisms for Large Scale Distributed Systems.- Network Monitoring in the age of the Cloud.- Recent Advances and Research Challenges in Desktop Grid and Volunteer Computing.- Research Challenges in Managing and Using Service Level Agreements.