Patent ID: 7644113

Claim:
A system for backing up at least one source data file, the system comprising: a data server having: a storage device for the at least one source data file, and an agent operating on the data server for: conducting a synchronization of the at least one source data file and at least one back up file corresponding to the at least one source data file; during the synchronization, allowing continuous access to the at least one source data file; and detecting changes to the at least one source data file and for recording the detected changes within a journal file as the at least one source data file is being changed; a back up server having storage for a back up file that corresponds to the at least one source data file; and a replication computer process operating on the back up server for: amending the at least one back up file by writing the detected changes from the journal file into the corresponding back up file as the detected changes are written to the journal file, and storing the detected changes into the journal file after the synchronization and based on the detected changes.