Patent ID: 6453325
Filing Date: 2002-09-17
Classification: G06F,Y10S

Abstract:
A method of restoring a database system having references to files stored in at least one file system external to the database system, comprising the steps of:placing in the database a reference to a file in the file system; making a record in the file system of the reference, the record initially indicating the existence of the reference, the records being changed to indicate deletion of the reference if the reference is deleted from the database system; initiating a restoration of database contents that existed at a time of database system operation (restore time); and (a) if the reference is placed in the database system prior to the restore time and the record indicates that the reference was deleted, changing the reference to indicate that the reference exists; or (b) if the reference was placed in the database system subsequent to the restore time and the record indicates that the reference exists, changing the record to indicate that the reference is deleted.