System and method for providing a backup copy of a database

Details System and method for providing a backup copy of a database System and method for providing a backup copy of a database

1995-03-22

1997-01-14

Black, Thomas G.

Boots, shoes, and leggings

395200, 395575, 395700, 3642311, 364265, 364DIG1, G06F 1314

Patent

active

055949002

ABSTRACT:
A backup method for a computer database system comprising maintaining a mirrored copy of the database at a remote location is characterized in that updates to the remote database data are delayed for a delay time greater than or equal to the upper limit on the data communication delay between the local location and the remote location and updates to a remote log for the database are executed after corresponding updates to a local log without said delay. In this way a consistent copy of the database may be recovered from the mirrored copy of the database and the remote log after destruction of the database system.

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