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Modern primary storage systems support or intend to add support for real time compression usually based on some flavor of the LZ77 and/or Huffman algorithm. There is a fundamental tradeoff in adding real time (adaptive) compression to such a system: to get good compression the amount of compressed data (the independently compressed block) should be large, to be able to read quickly from random places...
Many new storage systems provide some form of data reduction. We examine data reduction methods that might be suitable for \emph{primary} storage systems serving active data (as contrasted with backup and archive systems), by analysis of file sets found in different active data environments. We address questions of: how effective are compression and variations of deduplication, both separately and...
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