Limits

After you enable CDT, all existing and new pay-by-data-transfer instances are billed through CDT. Pay-by-bandwidth instances continue to be billed by the original Alibaba Cloud services.

Once a service switches to CDT billing, it cannot be reverted.

To enable pay-by-data-transfer metering for cross-border transfers for the first time, submit a cross-border application for review and approval.

CDT handles billing for Alibaba Cloud services only. To perform operations such as configuration upgrades, downgrades, or throttling, use the console of the corresponding Alibaba Cloud service.

CDT billing is not available for virtual network operators (VNOs) by default. Contact your account manager to enable it.

CDT calculates monthly Internet data transfer volumes by region and bills each region at tiered pricing rates. Unit prices may vary by data transfer volume in each region.

Cross-region data transfers do not use tiered pricing.

The tiered pricing cycle is one calendar month. Internet data transfer volumes reset to zero at the start of each month.

CDT does not support setting a traffic quota to automatically shut down instances when the quota is exceeded. CDT provides traffic statistics and billing summaries only, and does not include traffic control or automatic shutdown mechanisms.

To monitor your data transfer usage, set up alert rules in the Cloud Monitor console based on ECS network traffic metrics. Available metrics include network inbound rate (networkin_rate), network outbound rate (networkout_rate), and Internet outbound bandwidth usage (InternetOutRate_Percent). To create an alert rule, log on to the Cloud Monitor console and choose Alert Rules in the left-side navigation pane. Click Create Alert Rule, select an ECS instance and a network traffic metric, and then configure the threshold and alert level.