This topic describes how to purchase reserved instances in the Elastic Compute Service (ECS) console.
Prerequisites
Before you purchase reserved instances, make sure that the pay-as-you-go instances that you want to match meet the requirements for using reserved instances. For more information, see Overview.
You cannot manually manage how reserved instances and pay-as-you-go instances are matched. Make sure that you understand the matching rules for reserved instances. For more information, see Match between reserved instances and pay-as-you-go instances.
Procedure
Log on to the ECS console.
In the left-side navigation pane, choose Instances & Images >
> Reserved Instances. In the top navigation bar, select the region and resource group to which the resource belongs.
Click Purchase Now, or click Use and then click Purchase Reserved Instances.
Follow the on-screen instructions to purchase a reserved instance based on your business requirements.
Take note of the parameters described in the following table. For information about other parameters, see the instance buy page.
A reserved instance of the Reserved type is a zonal reserved instance.
A zonal reserved instance can be used to offset the bills of pay-as-you-go instances that have matching attributes in a single zone (the zone of the reserved instance).
A reserved instance of the Not Reserved type is a regional reserved instance.
A regional reserved instance can be used to offset the bills of pay-as-you-go instances that have matching attributes across zones within a specific region (the region of the reserved instance).
Parameter | Description |
Resource Reservation | Reserved Not Reserved |
Operating System Platform | The operating system platform of a reserved instance cannot be changed after you purchase the reserved instance. Proceed with caution. |