Improved Deduplication through Parallel Binning

Abstract

Many modern storage systems use deduplication in order to compress data by avoiding storing the same data twice. Deduplication needs to use data stored in the past, but accessing information about all data stored can cause a severe bottleneck. Similarity based deduplication only accesses information on past data that is likely to be similar and thus more likely to yield good deduplication. We present an adaptive deduplication strategy that extends Extreme Binning and investigate theoretically and experimentally the effects of the additional bin accesses.