You can purchase NAT gateways that are billed on a pay-as-you-go basis. If you want to create or delete NAT gateways based on your business requirements, you can purchase pay-as-you-go NAT gateways instead of subscription NAT gateways. This topic describes the billing rules of pay-as-you-go NAT gateways.
The pay-as-you-go billing method requires you to pay for the resources that you use.
- Pay-as-you-go NAT gateways are billed based on the billing cycle. Bills are generated and fees are deducted from your account after each billing cycle.
- You can delete pay-as-you-go NAT gateways at any time. After you delete a NAT gateway, the NAT gateway is no longer billed. For more information, see Delete a NAT gateway.
Total amount that you must pay for a pay-by-data-transfer NAT gateway = Instance fee + Capacity unit (CU) fee. You are charged and billed on an hourly basis. If you use a NAT gateway for less than 1 hour, the usage duration is rounded up to 1 hour.
- Instance fee = Instance unit price (USD/hour) × Usage duration (hours)
Usage duration refers to the time period from when the NAT gateway is purchased to when it is released.
CU fee per hour = CU unit price (USD/unit) × Number of CUs
Number of CUs consumed per hour by a NAT gateway = Max(Number of CUs based on new connections per hour, Number of CUs based on concurrent connections per hour, Number of CUs based on data transfer per hour)New connections, concurrent connections, and data transfer are three metrics to CUs. The following table describes how the number of CUs per hour is calculated based on these metrics.
Metric Unit CU coefficient Calculation of the number of CUs per hour Connections per second (CPS) Second 1,000 The system collects all CPS values within a billing cycle and then divides the highest CPS value by the CU coefficient to calculate the number of CUs. Concurrent connections (CONNS) Minutes 10,000 The system collects all CONNS values within a billing cycle and then divides the highest CONNS value by the CU coefficient to calculate the number of CUs. Data transfer (bytes) Hour 1 GB The system collects the total amount of data transfer including the inbound and outbound traffic within a billing cycle. Then, the system divides the total amount by the CU coefficient to calculate the number of CUs.Note The amount of outbound and inbound network traffic collected by the system equals the amount of network traffic to be processed by a NAT gateway.The following table describes the instance unit prices and CU prices for pay-by-data-transfer NAT gateways.Note If the prices in this table are different from those on the buy page,the prices on the buy page shall prevail. Region Instance unit price (USD/hour) CU unit price (USD/hour) China (Hangzhou) 0.034 0.034 China (Shanghai) China (Chengdu) China (Shenzhen) China (Heyuan) China (Qingdao) China (Beijing) China (Zhangjiakou) China (Hohhot) China (Ulanqab) China (Hong Kong) 0.043 0.043 UK (London) Japan (Tokyo) Singapore (Singapore) Australia (Sydney) Germany (Frankfurt) US (Silicon Valley) US (Virginia) Malaysia (Kuala Lumpur) Indonesia (Jakarta) India (Mumbai) UAE (Dubai)
ExampleYou created three enhanced NAT gateways that use the pay-by-data-transfer billing method in the UK (London) region at 08:10 (UTC+8) on July 8, 2020. Then, you released the NAT gateways at 08:50 (UTC+8) on July 8, 2020. The following table describes the highest CPS value, the highest CONNS value, and the total amount of data transfer of the NAT gateways within the time period from 08:10 (UTC+8) to 08:50 (UTC+8).
Metric Data collected from NAT Gateway 1 Data collected from NAT Gateway 2 Data collected from NAT Gateway 3 Highest CPS value (count/second) 1100 32 0 Highest CONNS value (count/minute) 20000 8 0 Total amount of data transfer (GB/hour) 3.5 0.0056 0The number of CUs is calculated by using the following formulas:
The CU fee is calculated by using the following formula:
Number of CUs based on CPS = Highest CPS value/CU coefficient Number of CUs based on CONNS = Highest CONNS value/CU coefficient Number of CUs based on data transfer = Total amount of data transfer/CU coefficient
CU fee = Max(Number of CUs based on new connections per hour, Number of CUs based on concurrent connections per hour, Number of CUs based on the amount of data transferred per hour) × CU unit price
Number of CUs Data collected from NAT Gateway 1 Data collected from NAT Gateway 2 Data collected from NAT Gateway 3 Number of CUs based on CPS 1100÷1000=1.1 32÷1000=0.032 0 Number of CUs based on CONNS 20000÷10000=2 8÷10000=0.0008 0 Number of CUs based on data transfer 3.5÷1=3.5 0.0056÷1=0.0056 0 CU fee (USD) 3.5×0.043=0.1505 0.032×0.043=0.001376 0
NAT gateways support only the pay-by-data-transfer metering method. The pay-by-specification NAT gateways that you purchased are still available in the following sizes: small, medium and large. The unit price of a pay-by-specification NAT gateway varies based on the size of the NAT gateway. The following table describes the unit price of each NAT gateway size.
|Region||Small (unit price)||Medium (unit price)||Large (unit price)|
|China (Hong Kong)|
|Malaysia (Kuala Lumpur)||0.109||2.606||0.211||5.068||0.410||9.845|
|US (Silicon Valley)||0.108||2.591||0.210||5.029||0.401||9.601|
- The NAT gateway continues to serve your workloads in the next 14 days from the time when the payment becomes overdue.
- The NAT gateway is suspended on the 15th day from the time when the payment becomes overdue. After the NAT gateway is suspended, you cannot manage the NAT gateway.
- If you do not pay the outstanding amount within 15 days after the NAT gateway is suspended, the NAT gateway is automatically deleted. An email is sent to you one day before the NAT gateway is deleted. After the NAT gateway is deleted, the configurations and data of the NAT gateway are deleted and cannot be recovered.
Recharge your account
- If you recharge your account within 15 days after the payment becomes overdue, your service is not suspended.
- If you recharge your account within 30 days after the payment becomes overdue, the system automatically pays the outstanding amount. After the system pays the outstanding amount, the NAT gateway immediately starts to provide services.