| 摘要 |
Apparatus, methods, and computers control processing delta chunks with delta hashes. The method includes computing a first hash for a chunk for which a duplicate determination is to be made. The first hash is suitable for making the duplicate chunk determination. The method also includes computing a delta hash for the chunk. The delta hash is suitable for making a delta chunk determination. Ideally, the method controls data de-duplication logic to process the chunk as a duplicate upon determining that the first hash matches a stored first hash. The method controls delta index logic to process the chunk as a delta chunk upon determining that the first hash does not match any stored hash and that one of the delta hashes matches a stored delta hash. Processing a chunk as a delta chunk may include storing a reference to a stored chunk and information on how to recreate the chunk from the referenced chunk.
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