Managing dereferenced chunks in a deduplication system
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United States of America Patent
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Oct 28, 2014
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N/A
app pub date -
Oct 23, 2013
filing date -
Aug 30, 2011
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Abstract
A chunk index has information on chunks in a storage space referenced in objects in the storage space. The chunk index includes a reference count for each chunk indicating a number of objects in which the chunk is referenced and a reference measurement representing a level of data object references to the chunk. One chunk is selected to remove from the storage space based on a criteria applied to the reference measurements of chunks having reference counts indicating that the chunks are not referenced in one object in the storage space.
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