Learn about the usage and billing limits of Cloud Data Transfer (CDT).
Limits on connected services
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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.
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Once a service switches to CDT billing, it cannot be reverted.
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To enable pay-by-data-transfer metering for cross-border transfers for the first time, submit a cross-border application for review and approval.
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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.
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CDT billing is not available for virtual network operators (VNOs) by default. Contact your account manager to enable it.
Limits on billing
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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.
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Cross-region data transfers do not use tiered pricing.
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The tiered pricing cycle is one calendar month. Internet data transfer volumes reset to zero at the start of each month.