This topic describes the billing of block storage devices, including the purchase, pricing, billing rules, and billing examples of local disks and Elastic Block Storage (EBS) devices such as cloud disks and elastic ephemeral disks. This topic also describes changes in billing when disk specifications are changed.
Purchase and pricing
Block storage devices are classified into cloud disks, such as Enterprise SSDs (ESSDs) and standard SSDs, local disks and elastic ephemeral disks. Local disks are available only for specific instance types and cannot be separately purchased. The local disk fees are included in the instance type fees. For information about local disks, see Local disks. The following section describes the purchase and pricing of cloud disks and elastic ephemeral disks.
Purchase: Go to the Disk page.
Pricing: The prices of cloud disks and elastic ephemeral disks vary based on the region. For more information, go to the Pricing tab of the Elastic Compute Service (ECS) product page.
Billing of cloud disks
Billing rules
Billable item | Category | Billing rule | Billing method |
Disk capacity | All cloud disks | Billing starts at the point in time when a cloud disk is created, regardless of whether the disk is attached to ECS instances. |
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Provisioned performance | ESSD AutoPL disks | You are charged for the performance provision fees of ESSD AutoPL disks for which the performance provision feature is enabled and the provisioned IOPS is configured. Bills are generated on an hourly basis. | Pay-as-you-go: Unit price of provisioned performance × Provisioned IOPS × Usage duration. |
Burst performance | ESSD AutoPL disks | By default, the performance burst feature is enabled for ESSD AutoPL disks. Burst performance is defined as the portion of performance (IOPS or throughput, whichever is higher) that exceeds the sum of the baseline performance and provisioned performance of the disk. Burst performance is billed in 1-second increments, and bills for burst performance are generated on an hourly basis. Burst performance is calculated in terms of burst I/O operations in 1-second increments based on the following rules: Note
| Pay-as-you-go: Unit price of burst performance × Burst I/O operations/10,000. |
Billing methods
The billing methods of cloud disks vary based on how the disks are created.
Created together with ECS instances: use the same billing method as the instances.
Separately created and then attached to ECS instances:
If the disks are attached to subscription instances, the disks support the subscription and pay-as-you-go billing methods.
If the disks are attached to pay-as-you-go instances, the disks support only the pay-as-you-go billing method.
Separately created and not attached to ECS instances: support only the pay-as-you-go billing method.
Change the billing method of a cloud disk
You can change the billing method for specific types of cloud disks. For more information, see Change the billing method of a disk.
Billing for changed disk specifications
The billing of your cloud disk may change when you perform the operations described in the following table.
Operation | Billing | References |
Resize a cloud disk | When you extend the disk capacity to resize a cloud disk, you are charged for the additional capacity. Note When you resize a cloud disk, you cannot change the billing method of the disk. | |
Change the category of a cloud disk | After you change the category of a cloud disk, you are charged for the disk based on the new category. | |
Change the performance level of an ESSD | After you change the performance level of an ESSD, you are charged for the ESSD based on the new performance level. | |
Modify the performance configurations of an ESSD AutoPL disk | If you enable the performance provision and performance burst features for an ESSD AutoPL disk or if you modify the provisioned IOPS of an ESSD AutoPL disk, you are charged for the ESSD AutoPL disk based on the new performance configurations. | Modify the performance configurations of an ESSD AutoPL disk |
Billing of local disks
Local disks are available only to specific instance types and cannot be separately purchased. The prices of local disks are included in the prices of instance types. For more information, see Local disks.
For information about instance families that are equipped with local disks, see Overview of instance families.
Billing of elastic ephemeral disks
Billing rules
After you create an elastic ephemeral disk, you are charged based on the capacity of the disk.
Subscription: Elastic ephemeral disk capacity (GiB) x Unit price x Subscription duration.
Pay-as-you-go: Elastic ephemeral disk capacity (GiB) x Unit price x Usage duration.
Billing methods
The billing methods of elastic ephemeral disks vary based on how the disks are created.
Created together with ECS instances: use the same billing method as the instances.
Separately created and then attached to ECS instances:
If the disks are attached to subscription instances, the disks support the subscription and pay-as-you-go billing methods.
If the disks are attached to pay-as-you-go instances, the disks support only the pay-as-you-go billing method.
Separately created and not attached to ECS instances: support only the pay-as-you-go billing method.
Billing examples
For example, you purchase a system disk and a data disk when you create an instance in the China (Hangzhou) region.
System disk: a PL0 ESSD with a capacity of 50 GiB
Data disk: a PL1 ESSD with a capacity of 100 GiB
The following table describes how the disks are billed.
The prices in the following table are provided only for reference. The prices displayed on the Pricing tab of the ECS product page prevail.
Billing method | Billing condition | Fee (USD) |
Subscription |
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Pay-as-you-go |
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