Reserved Storage Capacity (RSC) is a voucher that can be used to offset bills and reserve resources. After purchasing RSC, you can use it to offset EBS bills for your pay-as-you-go instances. RSC also reserves EBS resources for you, ensuring a stable supply.

If you combine RSC with pay-as-you-go volumes, you will receive discounts and lower costs compared to using pay-as-you-go volumes alone.

Compared with subscription volumes, RSC provides reserved resources at the time of purchase and can match any pay-as-you-go volume that meets the requirements rather than being limited to a specific volume. This provides greater flexibility.

Basic concepts

Term	Description

Term	Description
Reserved Storage Capacity (RSC)	A voucher that can be used to reserve resources and offset pay-as-you-go EBS capacity costs.
Resource reservation	Before creating a volume, you can purchase RSC vouchers to reserve storage capacity.

Lifecycle

The following table describes the statuses that RSC undergoes during its lifecycle.

Status

Description

Status	Description
Creating	The state after you purchase an RSC voucher but before it becomes active.
Effective	The normal state. In this state, an RSC voucher can offset pay-as-you-go EBS bills. Any unused portion reserves EBS resources equal to the remaining RSC.
Expired	The state of an RSC voucher after it expires or is unsubscribed. In this state, it can no longer offset pay-as-you-go EBS bills.

Offset policy

For more information on offset conditions and methods, see Offset policy.

Basic operations

Purchasing Reserved Storage Capacity

Viewing Reserved Storage Capacity usage details

Last updated: 2026.06.24 15:04:57

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