Storage capacity units (SCUs) are subscription storage resource plans that can be used to offset the pay-as-you-go bills of various storage resources. Compared with disks purchased together with subscription Elastic Compute Service (ECS) instances or resource plans of a specific resource, SCUs offer a better combination of cost-effectiveness and flexibility together with pay-as-you-go resources.
For more information, see Snapshot billing.
Offset factors
SCUs offset storage fees for multiple cloud products. The following table lists the offset factors for snapshot capacity in the Chinese mainland.
For more information about the pricing rules for other regions and cloud products, see or Pricing.
|
Type |
SCU capacity coefficient per GiB of storage |
Description |
|
Standard snapshot |
0.08 |
0.08 GiB of SCU capacity offsets 1 GiB of snapshot storage. |
Offset order
Snapshot storage fees are based on snapshot size and storage duration. The default billing method is pay-as-you-go. You can use an SCU to offset fees. Billing starts when a snapshot is created and ends when the snapshot is released.
The offset order for snapshot storage fees is: SCU > Pay-as-you-go
Offset example
A customer has 500 GiB of snapshot storage in January 2022 and has purchased a 35 GiB SCU. The monthly offset is calculated as follows:
|
Type |
SCU offset |
Pay-as-you-go |
|
Snapshot |
The 35 GiB SCU offsets 437.5 GiB of snapshot storage fees. |
The remaining 62.5 GiB (500 GiB - 437.5 GiB) of snapshot storage capacity is billed on a pay-as-you-go basis. |