Data processing: database and file management or data structures – File management – File systems
Reexamination Certificate
2005-08-04
2011-11-01
Ortiz, Belix M (Department: 2164)
Data processing: database and file management or data structures
File management
File systems
C711S162000, C711S170000
Reexamination Certificate
active
08051115
ABSTRACT:
A method for determining file fragmentation and performing subsequent defragmentation, including measuring a file fragmentation factor, measuring a file extent distance factor, measuring a file fragmentation level, selecting a file stored as multiple extents on at least one disk, selecting a free space extent on the disk whose length most closely matches the length of the file, calculating a fragmentation level of the disk from a fragmentation factor and a file extent distance factor of free space extents or allocated space extents of the disk, calculating the effect that moving the file to the free space extent would have on the fragmentation level, and moving the file to the free space extent provided that doing so causes the fragmentation level to satisfy a criterion.
REFERENCES:
patent: 6505217 (2003-01-01), Venkatraman et al.
patent: 2002/0128994 (2002-09-01), Sadhasivan et al.
patent: 2002/0133683 (2002-09-01), Jochemsen et al.
patent: 2006/0294059 (2006-12-01), Chamberlain et al.
AlphaPatent Assciates Ltd.
Ortiz Belix M
Swirsky Daniel J.
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