The basic services of Alibaba Cloud CDN support the pay-by-data-transfer and pay-by-peak-bandwidth metering methods. You can select a metering method based on your business requirements. This topic describes the metering methods of the basic services of Alibaba Cloud CDN.
By default, pay-by-data-transfer meters the amount of outbound data transfer on points of presence (POPs) and pay-by-peak-bandwidth meters the peak bandwidth on POPs.
The network traffic fluctuates and the bandwidth usage spikes. The daily bandwidth usage is lower than 30%.
To use the pay-by-peak-bandwidth metering method, make sure that the peak bandwidth value within the previous 30 days exceeds 5 Gbit/s and Contact your account manager or contact us by other means. For more information, see Contact us.
The network traffic is relatively flat and the daily bandwidth usage exceeds 30%.
The actual amount of data transfer that is billed is greater than the amount of data transfer that is recorded in the log. The amount of data transfer that is recorded in the log is equal to the amount of data transfer that is captured at the application layer. However, an additional amount of data is consumed to transmit the additional bytes that are inserted into TCP or IP packet headers and to retransmit TCP packets. Therefore, the actual amount of data transfer is greater than the amount of data transfer that is captured at the application layer. For more information, see Why is the traffic amount found by using the monitoring and usage analytics feature or the usage statistics feature different from the traffic amount that is logged?
In most cases, a bill is issued approximately 3 to 4 hours after the end of a billing cycle. The time when bills are issued is determined by the system.