Reserved instance (RI) is a billing discount applied to the use of pay-as-you-go CVM instances under your account. These CVM instances must exactly match attributes of the RI you purchased to benefit from the billing discount during the RI term. RI provide you with a significant discount compared to pay-as-you-go billing.
Currently, RIs are non-refundable.
Configurations of an RI cannot be changed after purchase. The RI billing discount will no longer apply to the matched instance if you change its configurations.
The RI billing discount will still apply to matched CVM instances even after they are proactively or forcibly shut down.
The pay-as-you-go CVM instances must exactly match RI attributes to benefit from the billing discount during the RI term.
|Concept||A discount for pay-as-you-go instances.||An instance purchased using the pay-as-you-go billing option, i.e., a running virtual machine.|
|Usage||RIs cannot be used separately; instead, it can only be used with matched pay-as-you-go instances to offset part of the pay-as-you-go bill.||CVMs can be managed and configured independently as a simple web server or as part of a powerful cloud solution together with other Tencent Cloud products.|
To check availability zones that support RIs, please use the DescribeReservedInstancesOfferings API.
Operating system: currently, RI supports Windows and Linux CVM instances.
Payment method: there are three payment options, namely All Upfront, Partial Upfront, and No Upfront.
Terms: 1 year(365 days)
Quota: each user can have up to 20 RIs in one availability zone.