On-line free space defragmentation of a contiguous-file file sys

Details On-line free space defragmentation of a contiguous-file file sys On-line free space defragmentation of a contiguous-file file sys

1997-03-06

2000-05-30

Alam, Hosain T.

Data processing: database and file management or data structures

Database design

Data structure types

711165, 711173, G06F 1730

Patent

active

060701722

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.

REFERENCES:
patent: 5345584 (1994-09-01), Hill
patent: 5555405 (1996-09-01), Griesmer et al.
patent: 5745756 (1998-04-01), Henley
patent: 5778392 (1998-07-01), Stockman et al.
patent: 5819290 (1998-10-01), Fujita
Abstract of the Japanese Patent Application No. JP 07050189, filed on Mar. 9, 1995, titled "Device for Rearranging Space inside Disk", Sep. 1996.

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