Abstract
We describe the design and implementation of WINDAR, an object-oriented toolkit for transparent rollback-recovery of distributed applications running on Windows platform. In WINDAR, the workloads of a process are multithreaded, exploiting effectively processor execution resources to improve execution efficiency. In addition, WINDAR's unified framework for various rollback recovery protocols enables dynamic protocol configuration to adapt itself to the need of recovery-oriented computing (ROC) and distributed computations in Internet environment. WINDAR was evaluated using three benchmarks. It is observed that multithreading is an effective approach to improve the performance of message logging protocols, especially for pessimistic message logging. In our experiment, the overhead ratio of pessimistic message logging was reduced to the same magnitude as that of the optimistic message logging for three benchmarks.
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