System for backing up files from disk volumes on multiple nodes of a computer network
October 23, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesBackup/restore technique in a microcomputer-based encryption system Method of updating encryption device monitor code in a multichannel data encryption system Data compression apparatus and method Backup computer program for networks File backup system for producing a backup copy of a file which may be updated during backup Signalling scheme for controlling data encryption device in an electronic fund transaction processing system Buffered peripheral system and method for backing up and retrieving data to and from backup memory device Digital data storage system with improved data migration Memory archiving indexing arrangement Target management method for data backup to a shared transfer station, multiple media element device InventorsAssigneeApplicationNo. 546727 filed on 10/23/1995US Classes:707/204, Archiving or backup707/10Distributed or remote accessExaminersPrimary: Black, Thomas G.Assistant: Coby, Frantz Attorney, Agent or FirmForeign Patent References
International ClassG06F 017/30AbstractA system for backing up files from disk volumes on multiple nodes of a computer network to a common random-access backup storage means. As part of the backup process, duplicate files (or portions of files) may be identified across nodes, so that only a single copy of the contents of the duplicate files (or portions thereof) is stored in the backup storage means. For each backup operation after the initial backup on a particular volume, only those files which have changed since the previous backup are actually read from the volume and stored on the backup storage means. In addition, differences between a file and its version in the previous backup may be computed so that only the changes to the file need to be written on the backup storage means. All of these enhancements significantly reduce both the amount of storage and the amount of network bandwidth required for performing the backup. Even when the backup data is stored on a shared-file server, data privacy can be maintained by encrypting each file using a key generated from a fingerprint of the file contents, so that only users who have a copy of the file are able to produce the encryption key and access the file contents. To view or restore files from a backup, a user may mount the backup set as a disk volume with a directory structure identical to that of the entire original disk volume at the time of the backup. | |
