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    ApsaraDB for SelectDB:Storage plans

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    ApsaraDB for SelectDB:Storage plans

    Last Updated:Dec 16, 2025

    ApsaraDB for SelectDB provides storage plans that can be used to offset fees for pay-as-you-go storage resources. This helps reduce costs. This topic describes the basic information, pricing, offset rules, and offset factors of ApsaraDB for SelectDB storage plans. This topic also describes how to purchase a storage plan and view the offset details and how to upgrade, renew, or unsubscribe from a storage plan.

    Important

    The fees described in this topic are for reference only. The actual fees in the console shall prevail.

    Overview of a storage plan

    Item

    Description

    Offset object

    Storage resources that you use for an ApsaraDB for SelectDB instance.

    Supported region

    China (Hangzhou), China (Shanghai), China (Qingdao), China (Beijing), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Shenzhen), China (Heyuan), China (Guangzhou), China (Chengdu), China (Hong Kong), Singapore, Malaysia (Kuala Lumpur), Indonesia (Jakarta), Philippines (Manila), Thailand (Bangkok), Japan (Tokyo), South Korea (Seoul), US (Silicon Valley), US (Virginia), UK (London), and Germany (Frankfurt).

    Note

    When you purchase a storage plan, you do not need to specify a region. By default, you can use the storage plan in the regions that are supported for ApsaraDB for SelectDB.

    Billing method

    Subscription.

    Supported subscription durations: 1 month, 2 months, 3 months, 4 months, 5 months, 6 months, 7 months, 8 months, 9 months, 10 months, 11 months, 1 year, and 2 years.

    Storage capacity

    Minimum value: 100 GB. Maximum value: 1,000,000 GB. Default value: 200 GB. You can adjust the value at a step size of 100 GB.

    Quantity

    You can purchase and use multiple storage plans.

    You can purchase up to 99 storage plans at a time.

    Offset priority

    The offset priority varies based on the product type, instance region, and the purchase time and subscription duration of the storage plan. For more information about the offset priority, see Offset rules.

    Specification change

    You can only upgrade storage plans.

    If the total storage capacity provided by storage plans is insufficient to offset storage resource fees, you can upgrade the storage plans or purchase additional storage plans. For more information, see Upgrade a storage plan.

    If the storage capacity of a storage plan exceeds what you require, you can unsubscribe from the storage plan or purchase an appropriate storage plan after the storage plan expires. For more information, see Unsubscribe from a storage plan.

    Renewal

    Supported.

    When you purchase or renew a storage plan, you can specify whether to enable auto-renewal for the storage plan. You can also manually renew the storage plan before the storage plan expires. For more information about how to renew a storage plan, see Renew a storage plan.

    Unsubscription

    Supported.

    Refundable amount = Paid amount - (List price of the order/Order duration) × Usage duration. For more information about unsubscription rules, see Unsubscription rules.

    For more information about how to unsubscribe from a storage plan, see Unsubscribe from a storage plan.

    Pricing of a storage plan

    Billing method

    Unit price

    Subscription

    USD 0.0173 per GB-month

    Offset factors of a storage plan

    The offset factors of a storage plan vary based on the regions and storage type. If storage plans that provide the same storage capacity reside in different regions or use different storage types, the offset factors of the storage plans may be different.

    Region

    Storage type

    Offset factor

    Storage capacity to offset 100 GB storage resources

    US (Silicon Valley), US (Virginia), South Korea (Seoul), Malaysia (Kuala Lumpur), Philippines (Manila), and Thailand (Bangkok)

    Standard (LRS)

    0.92

    (100 GB × 0.92) = 92.000 GB

    China (Hong Kong), Singapore, Germany (Frankfurt), Japan (Tokyo), UK (London), and Indonesia (Jakarta)

    Standard (LRS)

    0.98

    (100 GB × 0.98) = 98.000 GB

    China (Hangzhou), China (Shanghai), China (Qingdao), China (Beijing), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Shenzhen), China (Heyuan), China (Guangzhou), and China (Chengdu)

    Standard (LRS)

    1

    (100 GB × 1) = 100.000 GB

    Offset examples

    • If a total of 100 GB storage resources are used by an instance in the US (Virginia) region, you can use a storage plan to offset 92 GB of the used storage resources.

    • If a total of 100 GB storage resources are used by an instance in the Singapore region, you can use a storage plan to offset 98 GB of the used storage resources.

    • If a total of 100 GB storage resources are used by an instance in the China (Hangzhou) region, you can use a storage plan to offset 100 GB of the used storage resources.

    Offset rules of a storage plan

    Instance-related offset rules

    If you purchase multiple storage plans, the storage resource fees that are generated for your ApsaraDB for SelectDB instance are offset by using the storage plans based on the product type, region, and offset factor. The storage plan that expires the earliest is used first. If the storage capacity that you use exceeds the total storage capacity of storage plans, you are charged for the excess part based on the pay-as-you-go billing method. For more information, see Billable items and unit prices. The following figure shows the offset priorities of multiple storage plans.

    Note

    The following regions in the Chinese mainland are supported: China (Hangzhou), China (Beijing), China (Shanghai), China (Shenzhen), China (Qingdao), China (Zhangjiakou), China (Hohhot), China (Chengdu), China (Heyuan), China (Ulanqab), and China (Guangzhou).

    image

    Storage plan-related offset rules

    The following figure shows the offset priorities of multiple valid storage plans.

    image

    Billing examples

    • The storage capacity of a storage plan is equal to the storage capacity that you use.

      You purchase a storage plan that provides a storage capacity of 200 GB for one month. If all your ApsaraDB for SelectDB instances reside in the China (Hangzhou) region and the total amount of storage resources used by the instances per hour is 200 GB, you can use the storage plan to perfectly offset the storage resource fees generated for the instances. In this case, the monthly storage resource fee is USD 3.46. The value is obtained by using the following calculation: USD 0.0173 per GB-month × 200 GB × 1 month + USD 0.00. Compared with the pay-as-you-go billing method, the storage plan helps reduce the storage cost by USD 2.732. The value is obtained by using the following calculation: USD 0.000043 per GB-hour × 200 GB × 24 hours × 30 days - USD 3.46.

    • The storage capacity of a storage plan is greater than the storage capacity that you use.

      You purchase a storage plan that provides a storage capacity of 400 GB for one month. If you create three ApsaraDB for SelectDB instances that separately reside in the US (Virginia), Singapore, and China (Hangzhou) regions and the amount of storage resources used by each instance per hour is 100 GB, the storage resources that can be offset by using the storage plan is 100 GB × 0.92 + 100 GB × 0.98 + 100 GB × 1 = 290 GB. In this case, the storage capacity used by the instances does not exceed the storage capacity of the storage plan. The monthly storage resource fee is USD 6.92. The value is obtained by using the following calculation: USD 0.0173 per GB-month × 400 GB × 1 month + USD 0.00. Compared with the pay-as-you-go billing method, the storage plan helps reduce the storage cost by USD 1.648. The value is obtained by using the following calculation: (USD 0.000038 per GB-hour × 100 GB + 0.000038 per GB-hour × 100 GB + 0.000043 per GB-hour × 100 GB) × 24 hours × 30 days - USD 6.92.

    • The storage capacity of a storage plan is less than the storage capacity that you use.

      You purchase a storage plan that provides a storage capacity of 300 GB for one month. If you have three ApsaraDB for SelectDB instances that separately reside in the US (Virginia), Singapore, and China (Hangzhou) regions and the amounts of storage resources used by the instances per hour are separately 150 GB, 100 GB, and 100 GB, the storage capacity of the storage plan is exhausted but insufficient to offset the fees for storage resources used by the instance that resides in the China (Hangzhou) region. The excess storage capacity is 100 GB - (300 GB - 150 GB × 0.92 - 100 GB × 0.98)/1 = 36 GB, and you are charged for the excess part based on the pay-as-you-go billing method. In this case, the monthly storage fee is approximately USD 6.30. The value is obtained by using the following calculation: USD 0.0173 per GB-month × 300 GB × 1 month + USD 0.000043 per GB-hour × 36 GB × 24 hours × 30 days. Compared with the single pay-as-you-go billing method, the storage plan plus pay-as-you-go billing method helps reduce the storage cost of USD 3.636. The value is obtained by using the following calculation: (USD 0.000038 per GB-hour × 150 GB + 0.000038 per GB-hour × 100 GB + 0.000043 per GB-hour × 100 GB) × 24 hours × 30 days - USD 6.30.

    Purchase a storage plan

    Important

    • If the storage that you use exceeds the storage capacity of a storage plan, you are charged for the excess part based on the pay-as-you-go billing method. We recommend that you estimate the storage capacity you require before you purchase a storage plan. This prevents the waste of storage resources or insufficient storage capacity in the storage plan.

    • When you specify the subscription duration of a storage plan on the ApsaraDB for SelectDB buy page, you can specify whether to enable auto-renewal. We recommend that you select Auto-renewal. If you do not select Auto-renewal, the storage plan becomes invalid upon expiration. If the storage capacity of the storage plan is not exhausted before the expiration but excess storage resources exist, you are charged for the excess storage resources based on the pay-as-you-go billing method. This increases the storage costs.

    • After you purchase a storage plan, the storage plan immediately takes effect. You can use the storage plan to offset fees generated for the storage resources used by ApsaraDB for SelectDB instances on an hourly basis based on the product type, region, and offset factor.

    1. Go to the ApsaraDB for SelectDB buy page.

    2. Set the Product Type parameter to Storage Plan.

    3. Set the Plan Type parameter to ApsaraDB for SelectDB (Storage Plan).

    4. Configure the Capacity, Quantity, and Subscription Duration parameters.

    5. Select Auto-renewal.

    6. Click Buy Now.

    7. On the Confirm Order page, confirm the settings in the Parameters section and select Terms of Service.

    8. Click Pay and complete the payment.

    View the offset details of a storage plan

    View the offset details by storage plan

    On the Manage Reserved Instances page, you can perform the following operations:

    • View the storage plan.

      On the Instances tab, find the required storage plan based on the Product Name and Resource Package Name parameters.

      View the Status, Total Capacity, Period Capacity, Start Time, and End Time parameters of the storage plan.

    • View the offset details of a storage plan.

      On the Details tab, find the required storage plan based on the Product Name and Resource Package Name parameters. You can view the following information about the storage plan: Deduct Time, Before Deduct Capacity, Deducted Capacity, Post Deduct Capacity, Deduct User Name, Deduct Article Name, Deducted Instance Id, Deducted Billing Item, Measure Deducted, and Deduct Coefficient.

    View the offset details by instance

    1. Go to the Bill Details page.

    2. Find the required instance.

      Configure the following parameters and click Search.

      Parameter

      Description

      Billing Cycle

      The billing cycle.

      Instance Name

      The instance name.

      Product Details

      The storage plan details. Select ApsaraDB for SelectDB (Pay-as-you-go) or ApsaraDB for SelectDB (Subscription).

      Statistic Item

      The statistical item. Set this parameter to Billing Item

      Statistic Period

      The statistical period. Set this parameter to Billing Period.

    3. In the list that appears, find the record whose Billable Item is storage_size or elastic_storage_size.

      You can view the following information: Resource Plan ID, Deducted Amount by Resource Plan, Usage before Deduction, and Usage after Deduction. If the preceding information is not displayed, no storage plans are used. You are charged for the storage resources based on the pay-as-you-go billing method.

      If the preceding information is displayed, you can click the number in the Deducted Amount by Resource Plan column to go to the Manage Reserved Instances page. By default, the usage details of storage plans are displayed on the page that appears. You can view the offset details of the storage plan used by the instance within the period of time specified by the Effective At parameter.

    Upgrade a storage plan

    1. Go to the Manage Reserved Instances page.

    2. On the Instances tab, find the storage plan that you want to upgrade based on the Product Name and Resource Package Name parameters and click Upgrade in the Actions column.

    3. On the ApsaraDB for SelectDB (Storage Plan) | Upgrade/Downgrade page, configure the Capacity parameter.

      Note

      When you upgrade a storage plan, make sure that the new storage capacity of the storage plan must be greater than the current storage capacity.

    4. Read and select Terms of Service.

    5. Click Buy Now.

    6. On the Purchase page, Click Subscribe to complete the upgrade.

    Renew a storage plan

    Renew a storage plan on the Manage Reserved Instances page

    1. Go to the Manage Reserved Instances page.

    2. On the Instances tab, find the storage plan that you want to renew based on the Product Name and Resource Package Name parameters and click Renew in the Actions column.

    3. On the ApsaraDB for SelectDB (Storage Plan) | Renew page, configure the Subscription Duration parameter.

    4. Read and select Terms of Service.

    5. Click Buy Now.

    6. On the Purchase page, Click Subscribe to complete the renewal.

    Renew a storage plan on the Renewal page

    1. Go to the Renewal page.

    2. On the Renewal page, set the Instances parameter to ApsaraDB for SelectDB (Storage Plan).

    3. Find the required storage plan.

      Click the Manual, Auto, or Nonrenewal tab. On the tab that appears, find the required storage plan and click Renew in the Actions column.

    4. On the ApsaraDB for SelectDB (Storage Plan) | Renew page, configure the Subscription Duration parameter.

    5. Read and select Terms of Service.

    6. Click Buy Now.

    7. On the Purchase page, Click Subscribe to complete the renewal.

    Note

    • When you configure the Subscription Duration parameter on the ApsaraDB for SelectDB (Storage Plan) | Renew page, you can specify whether to enable auto-renewal. We recommend that you select Auto-renewal. If you do not select Auto-renewal, the storage plan becomes invalid upon expiration. If the storage capacity of the storage plan is not exhausted before the expiration, you are charged for the additional storage resources based on the pay-as-you-go billing method. This increases the storage costs.

    • On the Manual or Nonrenewal tab of the Renewal page, you can enable the auto-renewal feature for your storage plan. The auto-renewal period can be one month, two months, three months, six months, one year, two years, or three years.

    • After you enable the auto-renewal feature for a storage plan, the fee deduction for auto-renewal is performed nine days before the storage plan expires. If the first deduction attempt fails, the system retries the deduction once a day until the deduction succeeds or until one day before the instance expires. You can specify the deduction date for auto-renewal on the Renewal page. The deduction day must be at least three days before the storage plan expires.

    Unsubscribe from a storage plan

    For more information about how to unsubscribe from a storage plan, see Unsubscription management.