PRO: A Popularity-Based Multi-Threaded Reconstruction Optimization for RAID-Structured Storage Systems

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Provided by: USENIX
Topic: Storage
Format: PDF
In this paper, the authors propose and evaluate a novel dynamic data reconstruction optimization algorithm, called Popularity-based multi-threaded Reconstruction Optimization (PRO), which allows the reconstruction process in a RAID-structured storage system to rebuild the frequently accessed areas prior to rebuilding infrequently accessed areas to exploit access locality. This approach has the salient advantage of simultaneously decreasing reconstruction time and alleviating user and system performance degradation. It can also be easily adopted in various conventional reconstruction approaches.
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