This topic describes the billing of the burstable clean bandwidth feature that is provided by Anti-DDoS Pro and Anti-DDoS Premium.

Burstable clean bandwidth

Clean bandwidth refers to the peak bandwidth of normal service traffic that can be protected by an Anti-DDoS Pro or Anti-DDoS Premium instance. Clean bandwidth is measured in Mbit/s. In the following sections, the peak bandwidth of normal service traffic is referred to as the peak traffic. The normal service traffic refers to the sum of the normal service traffic of all services that are protected by the Anti-DDoS Pro or Anti-DDoS Premium instance.

When you purchase an Anti-DDoS Pro or Anti-DDoS Premium instance, you must select a value for the clean bandwidth based on your normal service traffic. The normal service traffic is determined based on the inbound traffic or outbound traffic, whichever is larger. The fee for the clean bandwidth is included in the subscription fee for the Anti-DDoS Pro or Anti-DDoS Premium instance. The larger the clean bandwidth, the higher the subscription fee of the Anti-DDoS Pro or Anti-DDoS Premium instance. Clean Width_cn

The burstable clean bandwidth feature provides extra clean bandwidth for your Anti-DDoS Pro or Anti-DDoS Premium instance. If your service traffic fluctuates and exceeds the clean bandwidth of the instance during peak hours, the burstable clean bandwidth feature prevents your service from being throttled.

By default, the burstable clean bandwidth feature is disabled. After you purchase an Anti-DDoS Pro or Anti-DDoS Premium instance, you can enable the burstable clean bandwidth feature. When you enable the burstable clean bandwidth feature, you must specify a value for the burstable clean bandwidth. You can specify a value that is up to nine times the clean bandwidth of the Anti-DDoS Pro or Anti-DDoS Premium instance. For more information, see Configure burstable clean bandwidth.

The burstable clean bandwidth feature uses the pay-as-you-go billing method. After you enable the burstable clean bandwidth feature, you are charged for the burstable clean bandwidth when the peak traffic exceeds the specified clean bandwidth. For more information, see Billing of the burstable clean bandwidth feature.

Billing of the burstable clean bandwidth feature

Item Description
Billing scope The billing scope refers to the usage of the burstable clean bandwidth. If the burstable clean bandwidth feature is disabled, you are not charged for the feature. Anti-DDoS Pro or Anti-DDoS Premium generates monthly bills for the usage of the burstable clean bandwidth only if the burstable clean bandwidth feature is enabled.
The usage of the burstable clean bandwidth is billed in each calendar month. The burstable clean bandwidth that can be used within a calendar month does not exceed the value that you specify for the burstable clean bandwidth. The actual usage of the burstable clean bandwidth is determined based on the monthly 95th percentile bandwidth.
  • Monthly 95th percentile bandwidth ≤ Clean bandwidth:

    The burstable clean bandwidth is not used, and you are not charged for the burstable clean bandwidth.

  • Clean bandwidth < Monthly 95th percentile bandwidth ≤ Sum of the clean bandwidth and the value that you specify for the burstable clean bandwidth:

    The burstable clean bandwidth is billed based on the difference between the monthly 95th percentile bandwidth and the clean bandwidth.

  • Monthly 95th percentile bandwidth > Sum of the clean bandwidth and the value that you specify for the burstable clean bandwidth

    The burstable clean bandwidth is billed based on the value that you specify for the burstable clean bandwidth.

    Notice
    • In this case, your service may be throttled. To prevent service throttling, you must increase the burstable clean bandwidth or increase the clean bandwidth at the earliest opportunity. For more information, see Configure burstable clean bandwidth and Upgrade an instance.
    • If your service traffic does not exceed the burstable clean bandwidth that you specify for the current calendar month, throttling and packet loss are not triggered.
Metering method (monthly 95th percentile bandwidth) The following list describes how to calculate the monthly 95th percentile bandwidth:
  1. Obtain the daily peak bandwidth: Collect the valid bandwidths of your Anti-DDoS Pro or Anti-DDoS Premium instance every 5 minutes within a calendar day, and 288 bandwidths are collected. Exclude the bandwidths that are collected during DDoS attacks. The largest bandwidth among the remaining bandwidths is used as the daily peak bandwidth.
  2. Calculate the monthly 95 percentile bandwidth: Sort the collected daily peak bandwidths within a calendar month in descending order and calculate the average value of the top 5 daily peak bandwidths. The average value is used as the monthly 95 percentile bandwidth.
    Note Query the burstable clean bandwidths of the days on which the top 5 daily peak bandwidths occur and compare the average value with the maximum burstable clean bandwidth that is chosen from the queried burstable clean bandwidths. If the average value is larger than the maximum burstable clean bandwidth, the maximum burstable clean bandwidth is used as the monthly 95 percentile bandwidth. The burstable clean bandwidth refers to the sum of the clean bandwidth and the value that you specify for the burstable clean bandwidth.

For more information about billing examples, see Billing examples.

Pricing After you enable the burstable clean bandwidth feature, the fee of the burstable clean bandwidth within a calendar month is calculated based on the usage of the burstable clean bandwidth multiplied by the effective factor, and then multiplied by the monthly unit price of the burstable clean bandwidth feature of your Anti-DDoS Pro or Anti-DDoS Premium instance. The billing cycle of the burstable clean bandwidth feature is calculated from 00:00:00 on the first day of the month to 23:59:59 on the last day of the month. The usage of the burstable clean bandwidth is measured in Mbit/s. The monthly unit price of the burstable clean bandwidth is measured in USD per month per Mbit/s.
  • Usage of the burstable clean bandwidth = Monthly 95 percentile bandwidth - Clean bandwidth The clean bandwidth refers to the clean bandwidth on the last day when the burstable clean bandwidth feature is enabled in a calendar month.
  • Effective factor = Number of valid days in a calendar month/Total number of days in the calendar month The number of valid days in a calendar month refers to the number of days that the burstable clean bandwidth feature is enabled in the calendar month. If the bill for April 2021 covers 26 valid days and the total number of days in April 2021 is 30, the effective factor of the month is 0.86666667, which is calculated based on the following formula: 26/30 = 0.86666667.

The monthly unit price of the burstable clean bandwidth feature varies based on the mitigation plan of your Anti-DDoS Pro or Anti-DDoS Premium instance. For more information, see Pricing of the burstable clean bandwidth feature.

For more information about billing examples, see Billing examples.

Bill generation time and settlement time Bill generation time:

A bill is generated at 10:00 the first day of the next calendar month after the current billing cycle ends. For example, the bill for the usage of the burstable clean bandwidth in January is generated on February 1. The January bill is generated for the usage of the burstable clean bandwidth from 00:00:00 on January 1 to 23:59:59 on January 31.

After a bill is generated, the bill is not immediately issued. You can query and check the details about the usage of the burstable clean bandwidth of the previous calendar month on the System logs page. If you have questions about the bill, submit a ticket.

If Alibaba Cloud confirms that the usage of the burstable clean bandwidth indicated by the bill is different from your actual usage, the bill is terminated, and you do not need to pay for the bill.

Settlement time:

If you do not have concerns about a bill, Alibaba Cloud deducts the fee of the burstable clean bandwidth from your account balance at 10:00 on the tenth day of the current calendar month. For example, Alibaba Cloud deducts the fee of January on February 10. You must make sure that the balance of your Alibaba Cloud account is sufficient. Otherwise, the burstable clean bandwidth feature becomes unavailable due to overdue payments.

You can query the issued bills on the System Log page.

Pricing of the burstable clean bandwidth feature

Instance type Unit price for the monthly 95th percentile bandwidth (USD per month per Mbit/s)
Anti-DDoS Pro instance of the Profession mitigation plan 15
Anti-DDoS Premium instance of the Insurance mitigation plan 16
Anti-DDoS Premium instance of the Unlimited mitigation plan 21
Anti-DDoS Premium instance of the Mainland China Acceleration (MCA) plan 155
Anti-DDoS Premium instance of the Secure Mainland China Acceleration (Sec-MCA) plan 155

Billing examples

You purchase an Anti-DDoS Pro instance of the Profession mitigation plan on February 1, 2022 and select 200 Mbit/s for the clean bandwidth. You also enable the burstable clean bandwidth feature and set the value of the burstable clean bandwidth to 300 Mbit/s. From February 3, 2022 to February 6, 2022, you adjust the clean bandwidth and the value of the burstable clean bandwidth each day. On February 8, 2022, you disable the burstable clean bandwidth feature. Then, you enable the burstable clean bandwidth feature on February 27, 2022 and set the value of the burstable clean bandwidth to 100 Mbit/s. The following figure shows the daily clean bandwidth, the daily burstable clean bandwidth, and the daily peak bandwidth. Billing of the burstable clean bandwidth feature
The following list describes the lines and symbols in the figure. The figure displays only the data that is collected when the burstable clean bandwidth feature is enabled. The data that is collected when the burstable clean bandwidth feature is disabled is not displayed.
  • Blue solid line: indicates the clean bandwidth.
  • Purple solid line: indicates the burstable clean bandwidth, which is the sum of the clean bandwidth and the value that you specify for the burstable clean bandwidth.
  • Red solid line: indicates the daily peak bandwidth. The red triangles indicate the top 5 daily peak bandwidths in the current month.

You can calculate the fee of the burstable clean bandwidth in February, 2022 based on the following formula: Fee of the burstable clean bandwidth = Usage of the burstable clean bandwidth × Effective factor × Monthly unit price of the burstable clean bandwidth feature of your Anti-DDoS Pro or Anti-DDoS Premium instance in USD per month per Mbit/s.

  1. Calculate the usage of the burstable clean bandwidth.
    You can calculate the usage of the burstable clean bandwidth based on the following formula: Usage of the burstable clean bandwidth = Monthly 95 percentile bandwidth - Clean bandwidth.
    1. Calculate the monthly 95 percentile bandwidth. In this example, the average value of the top 5 daily peak bandwidths is 600 Mbit/s, which is calculated based on the following formula: (1,000 Mbit/s + 500 Mbit/s + 600 Mbit/s + 500 Mbit/s + 400 Mbit/s)/5 = 600 Mbit/s. The average value is larger than the maximum burstable clean bandwidth, which is 500 Mbit/s, and the monthly 95 percentile bandwidth is 500 Mbit/s. The maximum burstable clean bandwidth is chosen from the queried burstable clean bandwidths of the days on which the top 5 daily peak bandwidths occur.
    2. Calculate the usage of the burstable clean bandwidth. The usage of the burstable clean bandwidth is 400 Mbit/s, which is calculated based on the following formula: 500 Mbit/s (the monthly 95 percentile bandwidth) - 100 Mbit/s (the clean bandwidth of the last day when the burstable clean bandwidth feature is enabled) = 400 Mbit/s.
  2. Calculate the effective factor.

    The effective factor is 10, which is calculated based on the following formula: 10 (the number of days when the burstable clean bandwidth feature is enabled)/28 (the total number of days in the current month) = 0.35714285.

  3. View the monthly unit price of the burstable clean bandwidth feature of your Anti-DDoS Pro instance of the Profession mitigation plan.

    You can view the monthly unit price in the Pricing of the burstable clean bandwidth feature section. The monthly unit price is USD 15 per month per Mbit/s.

Therefore, the burstable clean bandwidth is calculated based on the following formula: 400 Mbit/s × 0.35714285 × USD 15 per month per Mbit/s = USD 2,142.8571.