Backup data management method in which differential copy...

Details Backup data management method in which differential copy... Backup data management method in which differential copy...

2008-10-21

2011-12-27

Bataille, Pierre-Michel (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S112000, C711S165000, C711SE12103

Reexamination Certificate

active

08086807

ABSTRACT:
Provided is a computer system, comprising a storage system and a management computer. The management computer manages differential copy start times, differential data amounts of first pairs, and a data amount that can be copied in differential copy per unit time; identifies one of the first pairs for which the differential copy is to be started and a start time of the differential copy; subtracts the data amount of differential copy per unit time that is allocated to the identified one of the first pairs from a differential data amount of the identified first pairs; add the unit time to the identified start time; judges that the differential copy has been finished at a time when the subtracted differential data amount reaches zero or less; and calculates time zones in which the first pairs execute differential copy based on the time at which differential copy has been finished.

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