On-line free space defragmentation of a contiguous-file file system
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United States of America Patent
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May 30, 2000
Grant Date -
N/A
app pub date -
Mar 6, 1997
filing date -
Mar 6, 1997
priority date (Note) -
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Abstract
A file system configuration is scored by summing the squares of the sizes of each contiguous section of free space. A set of defragmentation plans, each describing a sequence of file movements, is generated and scored. The defragmentation plan with the highest score is chosen and executed. In moving a file, a temporary file of the same size is created and the file is copied to the temporary file. After the copying, the temporary file is designated as the file, and the file system space originally occupied by the file is unallocated.
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