After you create an Extreme NAS file system, you are billed based on the pay-as-you-go billing method by default. You can also purchase resource plans to offset storage usage fees of Extreme NAS file systems. This topic describes how you are billed for Extreme NAS file systems and how you can renew Extreme NAS file systems.

Billable items

Billable item Description
Storage capacity You are billed based on the storage capacity that you purchase. The billing cycle is 1 hour.

Billing methods

  • Pay-as-you-go

    After you create an Apsara File Storage NAS file system, you are billed based on the pay-as-you-go billing method by default.

    The storage usage fee is calculated by using the following formula: Storage usage fee = Capacity of the Extreme NAS file system × Unit price per hour.

    In the preceding formula, the capacity of the Extreme NAS file system is the capacity that you purchased. You are billed per hour based on the capacity instead of the storage usage.
    Note For NAS file systems, the unit of storage usage fees is USD/GiB/month. When the storage usage fee is calculated, the unit of measurement is converted to USD/GiB/hour. For more information, see Apsara File Storage NAS pricing.
  • Resource plans

    A resource plan is a type of subscription billing method. You can purchase multiple resource plans at a time and use them to offset the storage usage fees of multiple file systems.

    • Purchase method
      You can use resource plans to offset the storage usage fees of a pay-as-you-go Extreme NAS file system. For information about how to purchase resource plans, see Purchase resource plans.
      Note You cannot change the billing method of Extreme NAS file systems from subscription to pay-as-you-go. You cannot use resource plans to offset storage usage fees of your Extreme NAS file systems.
    • Deduction rules
      The following table describes the deduction rules that apply when you use resource plans to offset the storage usage of different storage classes of NAS file systems in mainland China. For the deduction rules that apply in other regions, use the calculator to view the relevant information.
      Specification Conversion coefficient Description
      Standard Extreme NAS 1 You can use 1 GiB of base capacity in your Extreme NAS resource plan to offset 1 GiB of storage usage from a standard Extreme NAS file system.
      Advanced Extreme NAS 1 You can use 1 GiB of base capacity in your Extreme NAS resource plan to offset 1 GiB of storage usage from an advanced Extreme NAS file system.
      You can use the calculator provided by Alibaba Cloud to calculate the deductions of the resource plans within your account in the current region. This way, you can select appropriate resource plans based on the current usage to save your costs.
    • Renewal and upgrade

      If you do not renew your resource plan when it expires, you can still use the associated file system. However, the billing method of the file system is changed to pay-as-you-go.

      You can renew and upgrade a resource plan. For more information, see Manage resource plans.

  • Subscription

    Subscription is a type of billing method that you can use to offset the storage usage fees of only the existing subscription Extreme NAS file systems.

    Note Alibaba Cloud has released resource plans for Apsara File Storage NAS, you can no longer purchase subscription Extreme NAS file systems. However, you can still renew and upgrade the existing Extreme NAS file systems. You can use a storage plan to offset the storage usage fees of only the Extreme NAS file system to which the storage plan is bound. In contrast, you can use multiple resource plans to offset the storage usage fees of multiple Extreme NAS file systems.
    • Deduction rules
      • After you create a subscription Extreme NAS file system, NAS offsets the subscription quota based on the maximum capacity of your file system.
      • The storage capacity that you purchased is the maximum storage capacity of the Extreme NAS file system. If the size of the data that you want to write to the file system exceeds the capacity, you must scale up the file system. Otherwise, the excess data cannot be written to the file system. For more information, see Scale up an Extreme NAS file system.
    • Renewal

      When a subscription Extreme NAS file system expires, it is automatically stopped. In this case, the data is temporarily retained but is inaccessible. When the subscription Extreme NAS file system is renewed, it is automatically resumed. For more information, see Renew a subscription Extreme NAS file system.

Examples

In this example, Mr. Wang has created an Extreme NAS file system in the China (Hangzhou) region. The average storage usage per hour in July 2020 was 1 TiB. The following table lists the monthly fees that were incurred by the file system based on the pay-as-you-go billing method and a resource plan (1 TiB, one month).
Billing method Fee
Pay-as-you-go Storage usage fee = 1,024 GiB × 0.3 USD/GiB/month = USD 307.2
Resource plan Storage usage fee = USD 252.8256

USD 252.8256 is the fee of the resource plan (1 TiB, one month) that Mr. Wang purchased for the subscription Extreme NAS file system.

Renew a subscription Extreme NAS file system

If you have a subscription Extreme NAS file system, you can renew the file system before it expires. If you renew the file system, you can select a duration to specify the validity period for the file system.
  • Renew the file system
    1. Log on to the NAS console.
    2. In the left-side navigation pane, choose File System > File System List. Find the file system, and choose More > Renewal Fee in the Actions column.
    3. On the Renew page, select a duration. The expiration date appears.

      The minimum duration is one month and the maximum duration is three years. You can renew the Extreme NAS file system again before it expires.

    4. Confirm your settings, and select Extreme NAS Terms of Service. Click Buy Now, and then complete the payment as prompted.
  • Note
  • Disable the auto-renewal feature
    1. Log on to the Bill Management console.
    2. On the Auto tab, find the Extreme NAS file system for which you want to disable the auto-renewal feature.
    3. In the Actions column, click Nonrenewal.
    4. In the Set as Nonrenewal dialog box, click OK.

      On the Nonrenewal tab, you can view the Extreme NAS file system for which the auto-renewal feature is disabled.

FAQ