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Torch Object Storage

Billable items

Data transfer

Traffic refers to the total amount of data transferred when accessing and using TOS. You pay for traffic to and from TOS. This includes outbound traffic over the public network, inbound traffic over the public network, outbound traffic over the private network, inbound traffic over the private network, CDN back-to-origin traffic, cross-region replication traffic, and cross-origin resource sharing traffic. This topic explains the billable items and calculation formulas for data transfer.

tip

This topic only provides a description of billable items. For specific prices, see TOS pricing details.

Traffic is calculated in decimal units. For example, 1 GB equals 1,000 MB.

Accessing TOS will not incur data transfer charges for requests that return 4xx (client errors) or 5xx (server errors) status codes.

Billable item	Description	Formula
Outbound traffic over the public network	Data transfer out from TOS to internet clients.	Pay-as-you-go: Data transfer cost = Outbound traffic volume over the public network (GB) × Price per GB Resource packages: Public outflow traffic packet
Inbound traffic over the public network	Data transfer in from internet clients to TOS.	Free of charge
Outbound traffic over the private network	Data transfer out from TOS to Volcano Engine clients.	Free of charge
Inbound traffic over the private network	Data transfer in from Volcano Engine clients to TOS.	Free of charge
CDN back-to-origin traffic	Data retrieved from TOS through Volcano Engine's Content Delivery Network (CDN) or Dynamic Content Delivery Network (DCDN) services. tip TOS will only charge you for CDN back-to-origin traffic if the origin type is TOS origin or the origin domain uses the default TOS domain. In all other cases, charges are calculated the same way as for public network traffic. Both CDN and DCDN use the same billable item (CDN back-to-origin traffic) and resource package (CDN return traffic packet).	Pay-as-you-go: Data transfer cost = CDN back-to-origin traffic volume (GB) × Price per GB Resource packages: CDN return traffic packet
Cross-region replication (CRR) traffic	Data transfer when replicating data across buckets in different regions.	Pay-as-you-go: Data transfer cost = CRR traffic volume (GB) × Price per GB Resource packages: Copy traffic packets across regions
Cross-origin resource sharing (CORS) traffic	Data transfer when accessing TOS across regions via multi-region access points.	Pay-as-you-go: Data transfer cost = CORS traffic volume (GB) × Price per GB

Last updated: 2026.07.24 10:16:22