Mechanism for incremental backup of on-line files

Details Mechanism for incremental backup of on-line files Mechanism for incremental backup of on-line files

1997-11-04

2000-08-08

Yoo, Do Hyun

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

707204, G06F 1216

Patent

active

061015857

ABSTRACT:
A backup mechanism enables incremental backup operations for on-line files of a computer system having an archive bit attribute associated with each file. The mechanism comprises an archive bit change number (ABCN) attribute that is also associated with each file and that is manipulated by a file system of the computer to reflect a correct value of the archive bit when the file is modified during a current backup operation. The ABCN attribute is incremented each time the file is modified to ensure that the file is accurately copied to secondary backup storage during a subsequent incremental backup operation. The mechanism thus enables reliable on-line file modifications which, in turn, substantially increases the efficiency of the computer system.

REFERENCES:
patent: 5263154 (1993-11-01), Eastridge et al.
patent: 5794254 (1998-08-01), McClain
patent: 5835953 (1998-11-01), Ohran
patent: 5875479 (1999-02-01), Blount et al.
patent: 5907672 (1999-05-01), Matze et al.

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