Abstract
Content Defined Chunking (CDC) is an important component in data deduplication, which affects both the deduplication ratio as well as deduplication performance. The sliding-window-based CDC algorithm and its variants have been the most popular CDC algorithms for the last 15 years. However, their performance is limited in certain application scenarios since they have to slide byte by byte. The authors present a leap-based CDC algorithm which provides significant improvement in deduplication performance without compromising the deduplication ratio. Compared to the sliding-window-based CDC algorithm, the new algorithm enables up to two-fold improvement in performance.
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