Incremental snapshot method and device
A technology of incremental snapshots and snapshots, which is applied to the generation of response errors, redundancy in operations for error detection of data, input/output to record carriers, etc. It can solve the problems of high storage cost, complicated operation and high storage cost. , to reduce storage space and storage costs, reduce risks, and facilitate storage management
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[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings. These implementation examples are described in sufficient detail to enable those skilled in the art to practice the invention. Logical, implementation and other changes may be made in the implementation without departing from the spirit and scope of the invention.
[0030] figure 1 is a schematic diagram of the frame structure of the snapshot system of the present invention, such as figure 1As shown, the snapshot data is stored in the cloud, and there are multiple snapshot relationships in the snapshot system. In a snapshot relationship, the physical disk volumes include: snapshot source volumes, copy-on-write (COW, Copy On Write) volumes, and snapshots. The three are independent of each other, among them,
[0031] The snapshot source volume is set by the user when creating a snapshot relationship, and is used to store the data when the user writes to the di...
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