Backup system, method, and program

Details Backup system, method, and program Backup system, method, and program

2006-04-20

2010-06-15

Shah, Sanjiv (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S161000, C714S005110, C714S006130

Reexamination Certificate

active

07739465

ABSTRACT:
A backup system is comprised of a main storage for storing original data and a plurality of local storages for distributing and storing the data. An encoding unit of the main storage server generates, after dividing the original data, a plurality of encoded data that is equal to or more than the dividing number by use of a code of which redundancy is variable. A distribution processing unit distributes the plurality of encoded data to the plurality of local storages, and causes the data to be stored therein. A restoring unit retrieves the encoded data corresponding to at least the division number of the original data from the local storages, and restores the original data. A redundancy control unit varies the redundancy in the encoding unit such that, the higher the importance of the data, the larger the redundancy. Furthermore, a distribution processing unit determines the distribution number such that the higher the reliability of the local storages, the more the number.

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Terminal Disclaimer filed in corresponding U.S. Appl. No. 11/443,201.
Japanese Office Action mailed on Dec. 1, 2009 and issued in corresponding Japanese Patent Application 2005-332790.

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