Volpe and Koenig, P.C.
Information storage system, snapshot acquisition method, and data storage medium
The information storage system of an aspect of the present invention includes a first differential data storage area which stores differential data of a higher volume from a first point of time to a second point of time, a lower snapshot manager which provides a lower snapshot at the second point of time of the higher volume, and a second differential data storage area which stores differential data of the higher volume after the second point of time. The higher snapshot manager acquires a plurality of generations of higher snapshots from the lower snapshot and the data in the first differential data storage area and acquires a plurality of generations of higher snapshots from the data of the higher volume and the data in the second differential data storage area.
Hitachi, Ltd.
G G
G06F G06F
additional inventional
Takahiro Tomoya
Nakano Anzai