Appeal No. 1999-2233
Application No. 08/794,691
Claims 1 and 10 are illustrative of the claimed
invention, and they read as follows:
1. A method of backup in a database system having
references to files stored in at least one file system
external to the database system, comprising the steps of:
establishing a reference in the database system to a file
in the file system; and
in response to establishing the reference, storing a
backup copy of the file in storage external to the file
system.
10. 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
3
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