Am I charged after I activate Apsara File Storage NAS?

No, you are not charged if you only activate Apsara File Storage NAS. You are charged when you write data to NAS file systems.

How can I stop being charged for Apsara File Storage NAS?

You cannot stop being charged for Apsara File Storage NAS by deactivating the service. This is because deactivating the service can result in business disruptions.

If you no longer want to use Apsara File Storage NAS, you can delete all mount targets of each file system, and then delete all the file systems. Then, you are not charged from the next billing cycle.

Why are the storage usage and the fees for a file system unchanged after I delete data from the file system?

The data size that is displayed in the Apsara File Storage NAS console is unchanged because a latency exists between two consecutive data updates. Bills are generated on an hourly basis. The bill of the previous hour is displayed in the Apsara File Storage NAS console.

How am I charged when I upload data to or download data from a file system?

  • Data migration from an on-premises storage system to Apsara File Storage NAS

    To enable access from the Internet to a NAS file system, you must configure an Elastic Compute Service (ECS) instance as an intermediate node. The ECS instance must allow access from the Internet. You are not charged for the inbound traffic of an elastic IP address (EIP). However, you are charged for the outbound traffic of an EIP. In this case, you are charged for the data that is downloaded from a NAS file system. However, you are not charged for the data that is uploaded to the NAS file system. For more information, see EIP billing.

  • Data migration between Object Storage Service (OSS) and Apsara File Storage NAS
    • If you read data from or write data to the Infrequent Access (IA) storage medium of a NAS file system, you are charged for the read and write traffic. For more information, see Billing of IA storage media.
    • You are charged for API requests when you call API operations to read data from or write data to OSS buckets. For more information, see API operation calling fees.
    • You are charged for the Data Transport service. The charges are included into your Data Transport bill. For more information, see Pricing.
  • Data migration between NAS file systems
    • You are charged for the traffic that is generated when you read data from or write data to the IA storage medium of a NAS file system. For more information, see Billing of IA storage media.
    • You are charged for the Data Transport service. For more information, see Pricing.

How am I billed for the storage usage of a NAS file system?

  • General-purpose NAS file system

    You are billed for a General-purpose NAS file system on an hourly basis based on the maximum storage usage. The storage usage indicates the total size of all files in the General-purpose NAS file system, excluding the size of directories. The basic storage unit is 4 KiB. If the size of a file is not a multiple of 4 KiB, the billed storage usage is rounded up to the nearest multiple of 4 KiB. For example, if the size of a file is 3 KiB, you are billed for a storage usage of 4 KiB.

  • Extreme NAS file system

    You are billed based on the capacity that is configured when you create an Extreme NAS file system.

How am I charged if my files are dumped to an IA storage medium?

If your files are dumped to an IA storage medium, you are charged based on the billing method of the IA storage medium. For more information, see Billing of IA storage media.

How are read and write traffic fees calculated for an IA storage medium?

You are billed based on the total amount of read and write traffic per hour when you read data from or write data to the IA storage medium. The amount of read and write traffic is reset to 0 each time an hourly bill is generated. The amount of read and write traffic starts from 0 again for subsequent hours.
  • If the data in the file system meets the lifecycle management rules, the data is automatically dumped to the IA storage medium. No write traffic fees are incurred for the data transfer.
  • If you access files in an IA storage medium, you are charged for the actual read and write traffic. If you read only a part of a file, you are charged for the read traffic that is generated.
  • If you run a data retrieval task, you are charged for read traffic based on the size of the retrieved files.
  • If you back up files from an IA storage medium, you are charged for read traffic based on the size of the files.
  • You are not charged for managing metadata in the IA storage medium. For example, you are not charged for running the ls command to show the metadata of specified files.

How am I charged when I back up files that are stored in an IA storage medium?

If you use Hybrid Backup Recovery (HBR) to back up files that are stored in an IA storage medium of a General-purpose NAS file system, you are charged for using HBR resources. For more information, see Billing methods and billable items.

During the backup process, HBR reads data from the files. Therefore, you are also charged for the traffic that is generated when HBR accesses the IA storage medium. For more information, see Billing of IA storage media.

Am I charged for a data retrieval task?

Yes, you are charged for a data retrieval task. When you run a data retrieval task, the system reads data from the specified file. You are charged for reading the file from the associated IA storage medium based on the size of the file. After a data retrieval task succeeds, the file is moved to the related General-purpose NAS file system and occupies storage space. In this case, you are charged for the storage space based on the size of the file. For more information, see Billing of IA storage media.

Am I charged when I use the recycle bin feature?

You are not charged if you only enable the recycle bin feature. However, you are charged for the storage usage of the temporary files in the recycle bin based on the pricing of the original storage type. For example, after you delete a file from a Capacity NAS file system, you are billed for the file based on the unit price of storage space in Capacity NAS file systems. After you delete a file from an IA storage medium, you are charged for the file based on the unit price of storage space in the IA storage medium. For more information, see Billing of General-purpose NAS file systems and Billing of IA storage media.

Why are the storage usage records displayed on my bills different from the storage usage records displayed in the console?

After you enable the recycle bin feature for a General-purpose NAS file system, you are billed for the temporary files in the recycle bin.

When you check the storage usage records, you must ensure that the temporary files in the recycle bin are included. Therefore, the storage usage of a General-purpose NAS file system is equal to the storage usage of all files in the file system plus the storage usage of the temporary files in the recycle bin.

Can I change the billing method of an Extreme NAS file system from subscription to pay-as-you-go?

No, you cannot change the billing method of an Extreme NAS file system after you create the file system. After a subscription Extreme NAS file system expires, you can create a pay-as-you-go Extreme NAS file system and migrate data from the subscription file system to the pay-as-you-go file system.

Why can I reduce the storage cost of a file by up to 92% after I dump the file to the IA storage medium?

For example, a Performance NAS file system resides in an Alibaba Cloud region in mainland China. The storage price for the file system is CNY 1.85/GiB /month whereas the storage price for an IA storage medium is CNY 0.15/GiB/month. Therefore, if a file is dumped to the IA storage medium, the storage cost of the file can be reduced by up to 92%.

Statistics indicate that 80% of the data stored in a NAS file system is cold data. For a Performance NAS file system, you can reduce the storage cost to about CNY 0.49/GiB/month after cold data in the file system is dumped to an IA storage medium. For a Capacity NAS file system, you can reduce the storage cost to about CNY 0.19/GiB/month after cold data in the file system is dumped to an IA storage medium.

How are read and write traffic fees calculated for an IA storage medium?

You are billed based on the total amount of read and write traffic per hour when you read data from or write data to the IA storage medium. The amount of read and write traffic is reset to 0 each time an hourly bill is generated. The amount of read and write traffic starts from 0 again for subsequent hours.

If the data in the file system meets the lifecycle management rules, the data is automatically dumped to the IA storage medium. No write traffic fees are incurred for the data transfer. If you access files in an IA storage medium, you are charged for the actual read and write traffic. If you run a data retrieval task, you are charged for read traffic based on the size of the retrieved files. If you back up files from an IA storage medium, you are charged for read traffic based on the size of the files.

When you read data from and write data to a file in an IA storage medium, the read and write traffic is not calculated based on the size of the entire file. Instead, the read and write traffic is calculated based on the actual traffic that is generated. For example, if you read only 1% of data from a file, you are charged only for the 1% of data.

When does a resource plan take effect after I purchase the resource plan? How can I calculate the time at which a resource plan takes effect or becomes ineffective?

A resource plan immediately takes effect after you purchase the resource plan. The resource plan automatically offsets the storage usage fee that is incurred after the purchase.

The resource plan takes effect on the hour and expires at 00:00:00 on the day after the expiration date. For example, you purchased a General-purpose NAS resource plan (10 TiB, one year) at 09:15:00 on August 21, 2019. The resource plan took effect at 09:00:00 on August 21, 2019 and expired at 00:00:00 on August 22, 2020. The last hour for which the resource plan offsets your storage usage fees is from 23:00 to 24:00 on August 21, 2020.

Why do I still have overdue payments after I purchase a resource plan?

After you purchase a storage plan and attach it to a file system, overdue payments may occur due to the following reasons:
  • The storage usage of the file system exceeds the capacity of the resource plan.

    For example, you have purchased a resource plan (100 GiB, one month) and attached the resource plan to a General-purpose NAS file system named File System A. During a billing cycle, the storage usage of File System A is 180 GiB. The fees for 100 GiB of storage usage are offset by the resource plan. Then, the pay-as-you-go billing method is applied and you have overdue payments for the 80 GiB of excess data. To prevent the overdue payments, you can upgrade the resource plan. For more information, see Upgrade a resource plan.

  • The resource plan has expired.

    For example, you purchased a resource plan (500 GiB, one month) at 10:39:41 on January 5, 2021, and attached the resource plan to a file system. The resource plan expired at 00:00:00 on February 6, 2021. After the resource plan expires, the pay-as-you-go billing method is applied and then you have overdue payments. To prevent the overdue payments, you can renew the resource plan before it expires. For more information, see Renew a resource plan.

  • The lifecycle management feature is enabled and the files that are stored in an IA storage medium are accessed.

    If a file meets the rule that is configured in the lifecycle management policy, the file is dumped to an IA storage medium. When you read data from or write data to the IA storage medium, you are charged for the read and write traffic based on the pay-as-you-go billing method. Then, you have overdue payments. For more information, see Billing of IA storage media.

  • The billing system has a latency.

    After you purchase a storage plan, it immediately takes effect. However, the bill for the previous hour may not be immediately generated due to the latency of the billing system. For example, you receive a bill at 10:00:00 on the current day. The bill may contain the fees that were incurred from 07:00:00 to 09:00:00 on the same day. We recommend that you check the time at which the fees are incurred after you receive the bill.

You can view the usage and fees of your file systems in the User Center. For more information, see View the billing and usage details.

Do I need to attach a resource plan to a General-purpose NAS file system to offset the storage usage fee of the file system?

No, you do not need to attach the resource plan to the file system. After you purchase a resource plan for a General-purpose NAS file system, the resource plan automatically offsets the storage usage fee of the file system based on the pay-as-you-go billing method.

How much cost can I save if I purchase a resource plan to offset the storage usage fee of a General-purpose NAS file system?

If you use a resource plan to offset the storage usage fee of a General-purpose NAS file system in an Alibaba Cloud region in mainland China, you can save at least 10% of the storage usage fee that is incurred when the pay-as-you billing method is applied. For more information, see Apsara File Storage NAS pricing.

What are the differences between a General-purpose NAS resource plan and a General-purpose NAS storage plan? Which plan is recommended?

A General-purpose NAS resource plan is a new type of subscription billing method for Apsara File Storage NAS. The resource plan has the following advantages over a storage plan:
  • A resource plan can offset the storage usage fees of multiple file systems at a time if the resource plan has sufficient capacity.
  • You can use multiple resource plans at a time to offset the storage usage fees of Capacity NAS file systems, Performance NAS file systems, and IA storage media.
  • You can purchase multiple NAS resource plans at a time. You can select the same capacity or different storage capacities for the resource plans to offset your storage usage fees as accurately as possible.
  • You do not need to attach a General-purpose NAS resource plan to a file system. If you want to add or delete a file system, you do not need to attach the resource plan to or detach it from the file system. The General-purpose NAS resource plan automatically offsets the storage usage fee of your current General-purpose NAS file system.

What do I do after a resource plan expires?

You can renew the resource plan. If you do not renew the resource plan, the pay-as-you-go billing method is automatically applied.

What do I do if the storage usage exceeds the capacity in a resource plan?

You are charged for the excess storage usage based on a pay-as-you-go billing method.

You can use the calculator to view the excess storage usage. If the excess storage usage is large, we recommend that you upgrade your resource plan or purchase another resource plan to offset the storage usage fee. For more information, see Purchase a resource plan and Upgrade a resource plan.

Can I purchase multiple resource plans at a time?

Yes, you can purchase multiple resource plans at a time. You can purchase multiple resource plans at a time for the same storage class of file systems in the same region.

How does a resource plan offset multiple storage classes of General-purpose NAS file systems?

A General-purpose NAS resource plan offsets storage usage fees based on the following sequence: Performance NAS file systems, Capacity NAS file systems, and IA storage media.

Can I use a resource plan to increase the bandwidth of a file system?

No, you cannot use a resource plan to increase the bandwidth of a file system. The bandwidth of a General-purpose NAS file system increases linearly with the storage usage. A resource plan can offset the storage usage fee, but cannot offset the bandwidth. For more information, see General-purpose NAS file systems.

Can I still use the storage plan that is attached to a file system after I purchase a resource plan?

Yes, you can still use the storage plan. If a storage plan is attached to a file system, the storage capacity of the storage plan is first used to offset the storage usage of the file system. The resource plan is used to offset the excess storage usage.

Can I use a resource plan to offset the storage usage fee of an Extreme NAS file system?

Yes, you can use a resource plan to offset the storage usage fee of an Extreme NAS file system.

Can I apply for a refund after I purchase a resource plan?

Yes, you can apply for a refund if no data is stored in the file system. To apply for a refund, submit a ticket.

Can I use a resource plan to offset the storage usage fee of a subscription Extreme NAS file system?

No, you cannot use a resource plan to offset the storage usage fee of a subscription Extreme NAS file system. However, you can use a resource plan to offset the storage usage fee of a pay-as-you-go Extreme NAS file system.

Why do I need more storage capacity of resource plans to offset the storage usage fee of a Performance NAS file system?

Because different storage classes of NAS file systems have different prices. The storage usage that a resource plan can offset from a file system is calculated based on a specific conversion coefficient. For example, a conversion coefficient of 5.47 is used when the storage usage that a resource plan can offset from a Performance NAS file system in regions in mainland China is calculated. If the storage usage of the Performance NAS file system is 10 GiB, the base capacity of the resource plan is 54.7 GiB.

Why do I still have overdue payments after I purchase a storage plan?

After you purchase a storage plan and attach it to a file system, overdue payments may occur due to the following reasons:
  • The storage usage of the file system exceeds the storage capacity of the storage plan.

    For example, you have purchased a storage plan (100 GiB, one month) and attached the storage plan to a Performance NAS file system named File System A. During a billing cycle, the storage usage of File System A is 180 GiB. The 100 GiB storage usage are offset first by the storage plan. Then, the pay-as-you-go billing method is applied and you have overdue payments for the 80 GiB of excess data. To prevent the overdue payments, you can upgrade the storage plan. For more information, see Upgrade a storage plan.

  • The storage plan expires.

    For example, you purchased a storage plan (500 GiB, one month) at 10:39:41 on August 5, 2020, and attached the storage plan to a file system. The storage plan expires at 00:00:00 on September 6, 2020. After the storage plan expires, the pay-as-you-go billing method is applied and then you have overdue payments. To prevent the overdue payments, you can renew the storage plan before it expires. For more information, see Manage storage plans.

  • The lifecycle management feature is enabled and the files that are stored in an IA storage medium are accessed.

    If a file meets the rule that is configured in the lifecycle management policy, the file is dumped to an IA storage medium. When you read data from or write data to the IA storage medium, you are billed for the read and write traffic based on the pay-as-you-go billing method. Then, you have overdue payments. For more information, see Billing of IA storage media.

  • The billing system has a latency.

    After you complete the payment, the storage plan immediately takes effect. However, a bill for the previous hour may not be immediately generated. For example, you receive a bill at 10:00:00. The bill may contain the fees that were incurred from 07:00:00 to 09:00:00. We recommend that you check the time at which the fees are incurred after you receive the bill.

You can view the usage and fees of your file systems in the User Center. For more information, see View the billing and usage details.

What is the relationship between a storage plan and the capacity of a file system?

  • Storage plan of a file system

    Storage plans are used to offset fees only for General-purpose NAS file systems.

    Note If you require a storage plan of a higher specification to meet your business requirements, you can upgrade the storage plan. For more information, see Upgrade a storage plan.
  • Capacity of a file system
    The capacity of a file system is the space that is provided by the file system to store data.
    • The maximum capacity of a Performance NAS file system is 1 PiB.
    • The maximum capacity of a Capacity NAS file system is 10 PiB.
    • You can select the capacity of an Extreme NAS file system when you purchase the file system. The maximum capacity of an Extreme NAS file system is 256 TiB.
    To view the storage usage of a file system, perform the following steps:
    1. Log on to the NAS console.
    2. In the left-side navigation pane, choose File System > File System List.
    3. Find the file system, and click the ID of the file system in the File System ID/Name column or click Manage in the Actions column. In the Basic Information section of the details page, view the storage usage and the capacity of the file system.

      On the details page of a General-purpose NAS file system, the Usage parameter indicates the maximum storage usage of the previous hour.

      In Linux, you can run the df -h command to view the storage usage of a file system. If the storage usage is 0, no data is stored in the file system.

Is the capacity of a file system limited to the capacity of a storage plan?

No, a storage plan that is attached to a file system does not limit the capacity of the file system. However, the storage usage of the file system cannot exceed the maximum capacity of the file system. The maximum capacity of a Performance NAS file system is 1 PiB. The maximum capacity of a Capacity NAS file system is 10 PiB. If the storage usage of the file system exceeds the storage capacity of the storage plan, the pay-as-you-go billing method is applied to the excess usage.

For example, you have purchased a storage plan (100 GiB, one month) and attached the storage plan to a Performance NAS file system named File System A. During a billing cycle, the storage usage of File System A is 180 GiB. The fees for 100 GiB of storage usage are offset by the storage plan and you are charged for the 80 GiB of excess storage usage based on the pay-as-you-go billing method.

When does a storage plan take effect?

A storage plan immediately takes effect after you complete the payment for the storage plan.

What can I do after a storage plan expires?

You can renew the storage plan. If you do not renew the storage plan, the pay-as-you-go billing method is applied. You can also purchase a resource plan after the storage plan expires. You can use the resource plan to offset the storage usage fee of a NAS file system without the need to attach the resource plan to the file system. For more information, see Purchase a resource plan.

What happens if the storage usage of a file system exceeds the storage capacity of a storage plan?

If the storage usage of the file system exceeds the storage capacity of the storage plan, the pay-as-you-go billing method is applied to the excess usage.

For example, you have created a Capacity NAS file system and attached a storage plan (500 GiB, one month) to the file system. The maximum storage usage of the file system is 550 GiB from 07:00:00 to 08:00:00 on August 1, 2020. The fees for 500 GiB of storage usage are offset by the storage plan and the pay-as-you-go billing method is applied to the 50 GiB of excess usage.

Can I purchase a storage plan if I do not attach it to a file system?

No, you cannot purchase a storage plan if you do not attach it to a file system. When you purchase a storage plan, you must attach it to a file system. You can attach each storage plan to only one file system. If you require a storage plan of a higher specification or longer duration, you can upgrade or renew the storage plan. For more information, see Upgrade a storage plan and Manage storage plans.

How can I detach a storage plan from a file system?

You cannot manually detach the storage plan from the file system. However, if you delete the file system, the storage plan is automatically detached.

How can I change the file system to which a storage plan is attached?

You must delete the file system to detach the storage plan and then attach the storage plan to another file system.

Can I apply for a refund after I purchase a storage plan?

Yes, you can apply for a refund if no data is stored in the file system to which the storage plan is attached.In this case, submit a ticket.

Can I attach a storage plan to an Extreme NAS file system?

No, you cannot attach a storage plan to an Extreme NAS file system. You can attach a storage plan only to a General-purpose NAS file system to offset fees for the file system. For more information about the billing of Extreme NAS file systems, see Billing of Extreme NAS file systems.

How can I view the expiration time of a storage plan?

You can view the basic information of the storage plan in the Storage Package section on the details page of the file system to which the storage plan is attached. The basic information includes the ID, capacity, start time, and expiration time of the storage plan.

Can I attach multiple storage plans to a file system?

No, you cannot attach multiple storage plans to a file system. You can attach only one storage plan to each file system. When you create a storage plan, you must attach it to a file system. You can attach each storage plan to only one file system. If you require a storage plan of a higher specification or longer duration, you can upgrade or renew the storage plan. For more information, see Upgrade a storage plan and Manage storage plans.

How can I check whether I have overdue payments?

You can check whether you have overdue payments in the User Center console. If you have overdue payments, you can no longer use your NAS file systems.

  1. Log on to the Alibaba Cloud Management Console.
  2. In the top navigation bar, click Expenses, and then go to the User Center console.
  3. In the left-side navigation pane, click Bill. On the page that appears, the overdue payments are displayed.
    If you have overdue payments, we recommend that you add funds to your account at your earliest opportunity.