Method and apparatus for compressing and decompressing sequentia

Details Method and apparatus for compressing and decompressing sequentia Method and apparatus for compressing and decompressing sequentia

1997-06-02

1999-12-07

Choules, Jack M

Data processing: database and file management or data structures

Database design

Data structure types

G06F 1730

Patent

active

059999365

ABSTRACT:
A system for compressing and decompressing sequential records to store only those parts of a record which differ from the previous record. The system for compressing includes a bit map which indicates which parts of a record if any are the same as the preceding record. The system enables compression and decompression of records without the need to access additional blocks and perform additional disk I/Os to obtain the expanded version of a given compressed record.

REFERENCES:
patent: 4074254 (1978-02-01), Belser et al.
patent: 4701745 (1987-10-01), Waterworth
patent: 5710919 (1998-01-01), Rail
McFadden et al. Data Base Management, pp. 303-309, 1985.

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