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Fast Checkpointing by Write Aggregation With Dynamic Buffer and Interleaving on Multicore Architecture

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Executive Summary

Large scale compute clusters continue to grow to ever-increasing proportions. However, as clusters and applications continue to grow, the Mean Time Between Failures (MTBF) has reduced from days to hours. As a result, fault tolerance within the cluster has become imperative. MPI, the de-facto standard for parallel programming, is widely used on such large clusters. Many MPI implementations use Checkpoint/Restart schemes using the Berkeley Lab Checkpoint Restart (BLCR) Library to achieve some level of fault tolerance. However, the performance of the Checkpoint/Restart mechanism does not scale well with increasing job size.

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