Patent ID: 9697089
Date: 2017-07-04
CPC Classifications: G06F

Claim:
1. A backup method for a backup system including an information processing apparatus and two or more information processing devices connected via a network, the backup method comprising: transmitting, by a first device among the plurality of information processing devices, a first backup image for all first file data stored in a storing unit of the first device to the information processing apparatus and transmitting the first backup image to a second device, the second device being an information processing device other than the first device among the plurality of information processing devices; and extracting a difference image and transmitting the difference image to the information processing apparatus by the second device, the difference image being a difference between the first backup image transmitted from the first device and a second backup image for all second file data stored in a storing unit of the second device, the plurality of information processing devices are classified into a plurality of groups, the first device transmits, in the transmission of the first backup image, the first backup image for all the first file data stored in the storing unit of the first device to the information processing apparatus and transmits the first backup image to the second device that belongs to the same group as a group to which the first device belongs, and the information processing apparatus performs processes of: