Patent ID: 6161109
Filing Date: 2000-12-12
Classification: G06F,Y10S

Abstract:
A method of identifying modifications in a database in a computer, the database containing data objects and being stored on a primary data storage device connected to the computer, the method comprising the steps of:generating a different data object identifier for each data object as the data object is modified, wherein the data object identifier reflects when the data object is modified;generating a different image identifier for an image copy of the database when the image copy is updated, wherein the image identifier reflects when the image copy is updated, and wherein the image copy is stored on a secondary data storage device; andwhen one or more data objects are to be copied from the primary data storage device to the secondary data storage device, only comparing the data object identifier to the image identifier and, if the data object identifier of the data object is greater than the image identifier of the image copy, copying the data object to the image copy.