Methods for storing data in a data storage system where a RAID-X format or formats are implemented at a file level
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United States of America Patent
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Sep 7, 2010
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app pub date -
Dec 19, 2007
filing date -
Aug 7, 2007
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Abstract
A data storage system where a RAID-X format is implemented at a file level includes storage devices, and one or more nodes that access files from the storage devices. N represents a maximum limit of failures beyond which reconstruction of a file stored using the file level implementation is not possible. A directory is encoded for each of a plurality of files, and a map is encoded that includes a list of storage devices where components of the directory associated with the map reside. The encoding of the directory is performed using a RAID-X format that can tolerate at least N+1 failures prior to being unable to reconstruct the directory.
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