BACKUP CONTROL DEVICE, BACKUP CONTROL METHOD, AND RECORDING MEDIUM
First Claim
Patent Images
1. A backup control device comprising:
- a master storage unit that stores master data;
a clone storage unit that stores latest differential data of the master data;
a snapshot storage unit that stores snapshot data, the snapshot data being data at time of acquisition of backup of the clone storage unit; and
a control unit that saves differential data into the snapshot storage unit when the differential data is present in the clone storage unit, and does not perform acquisition of the snapshot data when differential data is absent in the clone storage unit.
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Abstract
A backup control device includes a master storage unit, a snapshot storage unit, and a control unit. The master storage unit stores master data. The clone storage unit stores latest differential data of the master data. The snapshot storage unit stores snapshot data which is data at time of acquisition of backup of the clone storage unit. The control unit saves differential data into the snapshot storage unit when the differential data is present in the clone storage unit, and does not perform acquisition of the snapshot data when differential data is absent in the clone storage unit.
30 Citations
10 Claims
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1. A backup control device comprising:
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a master storage unit that stores master data; a clone storage unit that stores latest differential data of the master data; a snapshot storage unit that stores snapshot data, the snapshot data being data at time of acquisition of backup of the clone storage unit; and a control unit that saves differential data into the snapshot storage unit when the differential data is present in the clone storage unit, and does not perform acquisition of the snapshot data when differential data is absent in the clone storage unit. - View Dependent Claims (2, 3, 4, 5)
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6. A backup control method, comprising:
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storing master data; and upon receiving an update request of a clone storage unit that stores latest differential data of the master data after acquisition of backup of the clone storage unit, saving, when the differential data is present in the clone storage unit, the differential data into a snapshot storage unit, and not performing acquisition of the snapshot data when differential data is absent in the clone storage unit. - View Dependent Claims (7, 8, 9)
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10. A non-transitory computer readable recording medium storing a program for causing a computer to execute:
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processing of storing master data; and upon receiving an update request of a clone storage unit that stores latest differential data of the master data after acquisition of backup of the clone storage unit, processing of saving, when the differential data is present in the clone storage unit, the differential data into a snapshot storage unit, and not performing acquisition of the snapshot data when differential data is absent in the clone storage unit.
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Specification