About the Alibaba Cloud snapshot charging mechanism
Snapshot:
Each hard disk can create a snapshot of the current time, and can roll back to the previously created snapshot (lost now).
Snapshot creation billing: 1G 0.12 30*24 Hourly charge, daily bill
creation and No charge for use, unlimited creation and use.
You can restore the snapshot to other machines in the same region: use the snapshot to generate a hard disk on machine B (the cost of normal hard disk creation, which can be expanded later)
Mirroring: Only system snapshots can generate mirroring, which can restore the system of the current machine or other machines