File backup system for producing a backup copy of a file which may be updated during backup
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United States of America Patent
Stats
-
Nov 10, 1992
Grant Date -
N/A
app pub date -
Aug 11, 1989
filing date -
Aug 11, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A new file backup system facilitates backup of a file while it is being updated. The file header includes a set of flags which synchronize the backup operation. After the backup operation has begun, if a portion of the file being backed up requires updating, the portion of the original file to be updated is maintained in the digital data processing system. The backup control program performing the backup backs up the file, substituting the original portions for portions that have been updated. Since the updated portions of the file are maintained during backup, the file can be accessed and updated while the backup operation is taking place.
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