Anti-DDoS:Billing of burstable clean bandwidth

Overview

After purchasing an Anti-DDoS Pro or Anti-DDoS Premium instance for protection, burstable clean bandwidth (daily 95th percentile metering method) is enabled by default. If the peak service traffic exceeds the base clean bandwidth specification, you are charged for the excess bandwidth based on actual usage. Burstable clean bandwidth flexibly adapts to the growth needs of the following business scenarios. This eliminates the need for pre-emptive upgrade or downgrade operations and reduces O&M workload:

• Large-scale sales promotions during holidays: such as Black Friday and other major promotional events.

• New service launches: such as opening new game servers or releasing new products.

• Peak service access periods: such as university course selection systems or government lottery systems, which experience sudden increases in traffic during specific periods.

Supported instance types

• Anti-DDoS Proxy (Chinese Mainland): Profession, Advanced

• Anti-DDoS Proxy (Outside Chinese Mainland): Insurance,Unlimited, Sec-CMA 2.0, Sec-CMA 2.0 (Insurance), Sec-CMA 2.0 (Unlimited), Chinese Mainland Acceleration, Sec-CMA 1.0

Burstable bandwidth peak

• Formula: Elastic Bandwidth Peak = min(Base Clean Bandwidth × 10, Elastic Bandwidth Upper Limit).

  Note

  The elastic peak represents the default upper limit of allocated elastic resources. When actual business usage exceeds the elastic peak, the product continues to provide service to the best of its ability, and you will incur elastic pay-as-you-go charges based on actual usage. However, packet loss may occur during the cluster scale-out period. We recommend that you promptly upgrade your guaranteed clean bandwidth.

• Burstable bandwidth limit:

  • Anti-DDoS Proxy (Chinese Mainland): Profession (20,000 Mbps), Advanced (20,000 Mbps)

  • Anti-DDoS Proxy (Outside Chinese Mainland):Insurance(5,000 Mbps), Unlimited (5,000 Mbps), Sec-CMA 2.0 (1,500 Mbps), Chinese Mainland Acceleration (1,000 Mbps), Sec-CMA 1.0 (500 Mbps)

Billing methods

• Burstable clean bandwidth is a pay-as-you-go feature. It supports two metering methods: daily 95th percentile and monthly 95th percentile. It takes effect immediately after you enable it.

• You can switch between the metering methods. The new metering method takes effect at 00:00 on the first day of the next calendar month. You can change the metering method up to three times per calendar month. The last change made within a calendar month takes effect in the following month.

  Comparison Item	Daily 95th percentile	Monthly 95th percentile
  Fee settlement	Fees are settled on a calendar day basis. Note If you enable burstable clean bandwidth for the first time on Day T of a calendar month and select the daily 95th percentile metering method, you are not charged on Day T. Fees are incurred starting from Day T+1. The bill is generated on Day T+2.	Fees are settled on a calendar month basis.
  Billing conditions	Fees are incurred if the 95th percentile bandwidth of a calendar day exceeds the Clean Bandwidth specification.	Burstable clean bandwidth fees are incurred if the 95th percentile bandwidth of a calendar month exceeds the Clean Bandwidth specification.
  Fee calculation formula	Burstable clean bandwidth fee = (95th percentile bandwidth of a calendar day - Clean Bandwidth) × corresponding daily unit price (USD/day/Mbps). Important If the 95th percentile bandwidth of a calendar day exceeds the peak elastic bandwidth, the service continues to run on a best-effort basis and you are charged for the excess usage on a pay-as-you-go basis. However, packet loss may occur while the cluster is elastically scaling out. We recommend that you promptly upgrade the guaranteed clean bandwidth. 95th percentile bandwidth of a calendar day: Within a calendar day, the system collects valid bandwidth values from the Anti-DDoS Pro or Anti-DDoS Premium instance every 5 minutes, resulting in 288 values per day. It removes values collected during DDoS attacks and then removes the top five of the remaining values. The highest remaining value is the 95th percentile bandwidth for that day. Clean Bandwidth: The clean bandwidth specification that you configure when you purchase a DDoS instance.	Burstable clean bandwidth fee = (95th percentile bandwidth of a calendar month – Clean Bandwidth) × effective factor × Monthly unit price(USD/month/Mbps). Important If the 95th percentile bandwidth of a calendar month exceeds the burstable bandwidth cap, the service continues on a best-effort basis and you are billed for the actual burstable usage on a pay-as-you-go basis. However, packet loss may occur during the elastic scale-out period of the cluster. We recommend that you promptly upgrade the guaranteed clean bandwidth. 95th percentile bandwidth of a calendar month: Calculate the 95th percentile bandwidth of a calendar month as follows: Obtain the daily peak bandwidth: Within a calendar day, the system collects valid bandwidth values from the Anti-DDoS Pro or Anti-DDoS Premium instance every 5 minutes, resulting in 288 values per day. After removing values collected during DDoS attacks, the highest remaining value is the daily peak bandwidth. Calculate the monthly 95th percentile bandwidth: Sort all daily peak bandwidth values for a calendar month in descending order. The average of the top five values is the 95th percentile bandwidth for that month. Clean Bandwidth: The Clean Bandwidth specification on the last day of the calendar month on which burstable clean bandwidth was enabled. Effective factor: Effective factor = Number of valid days in the month ÷ Total number of days in the month. Description: If you enable burstable clean bandwidth for the first time on Day T of a calendar month and select the monthly 95th percentile metering method, Day T is not counted as a valid day for that month. Example: You enable burstable clean bandwidth on July 15, 2023, and do not disable it in July. The number of valid days is 16, from July 16, 2023 to July 31, 2023. The total number of days in the month is 31. The effective factor is 16 ÷ 31 = 0.51612903.
  Conditions	Daily 95th percentile billing uses the clean bandwidth specification of Day T-1 (the day before traffic generation) as the base bandwidth for calculation. Therefore, if you upgrade the clean bandwidth specification on a given day, the new specification takes effect as the billing baseline in the bill generated on the next day.	You can disable the monthly 95th percentile metering method only once per calendar month. You cannot switch the metering method on the last day of a calendar month.

Burstable clean bandwidth pricing

Bill generation and settlement

Billing example

Daily 95th percentile billing example: An Anti-DDoS Pro (Chinese Mainland) Professional Edition instance has burstable clean bandwidth enabled and uses the daily 95th percentile metering method. The daily configurations and traffic are as follows:

• January 1: Clean bandwidth specification is 100 Mbps.

• January 2: The clean bandwidth specification is upgraded from 100 Mbps to 150 Mbps. The actual 95th percentile bandwidth of a calendar day is 170 Mbps.

• January 3: The actual 95th percentile bandwidth of a calendar day is 170 Mbps.

• January 4: The actual 95th percentile bandwidth of a calendar day is 1,650 Mbps.

According to the billing formula: burstable clean bandwidth fee = (95th percentile bandwidth of a calendar day − Clean Bandwidth) × corresponding daily unit price(USD/month/Mbps), the fee calculation is as follows:

1. January 3 bill (calculates burstable clean bandwidth fee for January 2):

   • Clean bandwidth specification on Day T-1 (January 1) = 100 Mbps.

   • 95th percentile bandwidth of a calendar day on January 2 = 170 Mbps.

   • Burstable clean bandwidth fee = (170 - 100) Mbps × 1 (USD/day/Mbps) = 70 USD.

2. January 4 bill (calculates burstable clean bandwidth fee for January 3):

   • Clean bandwidth specification on Day T-1 (January 2) = 150 Mbps.

   • 95th percentile bandwidth of a calendar day on January 3 = 170 Mbps.

   • Burstable clean bandwidth fee = (170 - 150) Mbps × 1 (USD/day/Mbps) = 20 USD.

3. January 5 bill (calculates burstable clean bandwidth fee for January 4):

   • Clean bandwidth specification on Day T-1 (January 3) = 150 Mbps.

   • 95th percentile bandwidth of a calendar day on January 4 = 1,650 Mbps.

     Note

     This exceeds the Burstable bandwidth peak = min(150 × 10, 20,000) = 1,500 Mbps. However, the system still strives to provide service and bills based on the actual 95th percentile bandwidth of a calendar day of 1,650 Mbps.

   • Burstable clean bandwidth fee = (1,650 - 150) Mbps × 1 (USD/day/Mbps) = 1,500 USD.

References

• System logs

• Operation logs