Inventors:
Kenneth J. Cross - Knoxville TN, US
Assignee:
Barracuda Networks Inc - Campbell CA
International Classification:
G06F 12/00
G06F 13/00
US Classification:
711162, 711100, 711154, 711169, 707609
Abstract:
A method for backing up a computer-readable data file with a computerized backup application, where the data file is open and locked for exclusive access by an owning application that is mutually independent of the backup application. The backup application by-passes the lock on the data file. Any write operations to the data file by the owning application are intercepted and delayed. The address range of any write operations directed to the data file by the owning application during the backup procedure are written to a change log file, where the change log file contains no indication of the content of the write operations. At least a portion of the data file is copied to a backup file, and any intercepted and delayed write operations are passed on to the data file after the data to be overwritten has been copied to the backup file.
