File availability in distributed file storage systems
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United States of America Patent
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Nov 20, 2007
Grant Date -
May 18, 2006
app pub date -
Jan 20, 2006
filing date -
Mar 7, 2002
priority date (Note) -
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Abstract
File availability in distributed file storage systems is improved by initially placing replicas of a file or other object on different ones of multiple devices using a first process. Subsequently, the placement of the replicas is improved by evaluating whether any replicas of a first file can be swapped with any replicas of a second file without a reduction in the combined file availability of the first and second files, and swapping a replica of the first file with a replica of the second file if the swapping results in no reduction in the combined file availability of the first and second files.
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