Constitutes the proceedings of the 12th International Conference on Principles of Distributed Systems, OPODIS 2008, held in Luxor, Egypt, in December 2008. This book focuses on the topics that include communication and synchronization protocols; distributed algorithms and multiprocessor algorithms; and distributed cooperative computing.

Invited Talks.- The Next 700 BFT Protocols.- On Replication of Software Transactional Memories.- Regular Papers.- Write Markers for Probabilistic Quorum Systems.- Byzantine Consensus with Unknown Participants.- With Finite Memory Consensus Is Easier Than Reliable Broadcast.- Group Renaming.- Global Static-Priority Preemptive Multiprocessor Scheduling with Utilization Bound 38%.- Deadline Monotonic Scheduling on Uniform Multiprocessors.- A Comparison of the M-PCP, D-PCP, and FMLP on LITMUSRT.- A Self-stabilizing Marching Algorithm for a Group of Oblivious Robots.- Fault-Tolerant Flocking in a k-Bounded Asynchronous System.- Bounds for Deterministic Reliable Geocast in Mobile Ad-Hoc Networks.- Degree 3 Suffices: A Large-Scale Overlay for P2P Networks.- On the Time-Complexity of Robust and Amnesic Storage.- Graph Augmentation via Metric Embedding.- A Lock-Based STM Protocol That Satisfies Opacity and Progressiveness.- The 0–1-Exclusion Families of Tasks.- Interval Tree Clocks.- Ordering-Based Semantics for Software Transactional Memory.- CQS-Pair: Cyclic Quorum System Pair for Wakeup Scheduling in Wireless Sensor Networks.- Impact of Information on the Complexity of Asynchronous Radio Broadcasting.- Distributed Approximation of Cellular Coverage.- Fast Geometric Routing with Concurrent Face Traversal.- Optimal Deterministic Remote Clock Estimation in Real-Time Systems.- Power-Aware Real-Time Scheduling upon Dual CPU Type Multiprocessor Platforms.- Revising Distributed UNITY Programs Is NP-Complete.- On the Solvability of Anonymous Partial Grids Exploration by Mobile Robots.- Taking Advantage of Symmetries: Gathering of Asynchronous Oblivious Robots on a Ring.- Rendezvous of Mobile Agents When Tokens Fail Anytime.- Solving Atomic Multicast When Groups Crash.- ASelf-stabilizing Approximation for the Minimum Connected Dominating Set with Safe Convergence.- Leader Election in Extremely Unreliable Rings and Complete Networks.- Toward a Theory of Input Acceptance for Transactional Memories.- Geo-registers: An Abstraction for Spatial-Based Distributed Computing.- Evaluating a Data Removal Strategy for Grid Environments Using Colored Petri Nets.- Load-Balanced and Sybil-Resilient File Search in P2P Networks.- Computing and Updating the Process Number in Trees.- Redundant Data Placement Strategies for Cluster Storage Environments.- An Unreliable Failure Detector for Unknown and Mobile Networks.- Efficient Large Almost Wait-Free Single-Writer Multireader Atomic Registers.- A Distributed Algorithm for Resource Clustering in Large Scale Platforms.- Reactive Smart Buffering Scheme for Seamless Handover in PMIPv6.- Uniprocessor EDF Scheduling with Mode Change.

This book constitutes the refereed proceedings of the 12th International Conference on Principles of Distributed Systems, OPODIS 2008, held in Luxor, Egypt, in December 2008. The 30 full papers and 11 short papers presented were carefully reviewed and selected from 102 submissions. The conference focused on the following topics: communication and synchronization protocols; distributed algorithms and multiprocessor algorithms; distributed cooperative computing; embedded systems; fault-tolerance, reliability and availability; grid and cluster computing; location- and context-aware systems; mobile agents and autonomous robots; mobile computing and networks; peer-to-peer systems and overlay networks; complexity and lower bounds; performance analysis of distributed systems; real-time systems; security issues in distributed computing and systems; sensor networks; specification and verification of distributed systems; and testing and experimentation with distributed systems.

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