ModifyReservedInstances

This operation is an asynchronous operation. After you call this operation to modify a reserved instance, the operation starts the modification process and returns the ID of the resulting new reserved instance. The original reserved instance enters the Updating state and then the Inactive state. At the same time, the resulting new reserved instance is generated and enters the Creating state and then the Active state. You can call the DescribeReservedInstances operation to query the states of the reserved instance.

• You can modify the configurations of a reserved instance only if the reserved instance is in the Active state.

• Make sure that the computing power of the reserved instance remains unchanged before and after the modification. Otherwise, the modification fails.

• You cannot split, merge, or change the scope of a reserved instance at the same time.

For more information, see Split, merge, or modify reserved instances.

Sample requests

• Sample request to split a reserved instance: Split a regional reserved instance that is scoped to the China (Hangzhou) region and can match two pay-as-you-go instances of the ecs.g5.xlarge instance type into two regional reserved instances that are scoped to the China (Hangzhou) region and each can match one pay-as-you-go instance of the ecs.g5.large instance type:

"RegionId":"cn-hangzhou", //The ID of the region.
"ReservedInstanceId":["ecsri-bp1hd03e9uv19e75****"], //The ID of the reserved instance that you want to split.
"Configuration":[
  {
    "ReservedInstanceName":"testReservedInstanceName1", //The name of the new reserved instance.
    "InstanceType":"ecs.g5.large", //The instance type that the new reserved instance can match.
    "Scope":"Region", //The scope level of the new reserved instance, which must be the same as the scope level of the original reserved instance.
    "InstanceAmount":1 //The number of pay-as-you-go instances of the specified instance type that each new reserved instance can match.
  },
  {
    "ReservedInstanceName":"testReservedInstanceName2",
    "InstanceType":"ecs.g5.large",
    "Scope":"Region",
    "InstanceAmount":1
  }
]

• Sample request to merge reserved instance:: Merge two zonal reserved instances that are scoped to Hangzhou Zone H and can match four pay-as-you-go instances of the ecs.g5.xlarge instance type into one zonal reserved instance that is scoped to Hangzhou Zone H and can match two pay-as-you-go instances of the ecs.g5.4xlarge instance type:

"RegionId":"cn-hangzhou", //The ID of the region.
"ReservedInstanceId":["ecsri-bp1hd03e9uv16b75****",""ecsri-bp1hd03e9uv16b76****""], //The IDs of the reserved instances that you want to merge.
"Configuration":[
  {
    "ReservedInstanceName":"testReservedInstanceName", //The name of the new reserved instance.
    "InstanceType":"ecs.g5.4xlarge", //The instance type that the new reserved instance can match.
    "Scope":"Zone", //The scope level of the new reserved instance, which must be the same as the scope level of the original reserved instances.
    "ZoneId":"cn-hangzhou-h", //
    "InstanceAmount":2 //The number of pay-as-you-go instances of the specified instance type that the new reserved instance can match.
  }
]

• Sample request to change the scope of a reserved instance: Change a regional reserved instance that is scoped to Hangzhou Zone H and can match six pay-as-you-go instances of the ecs.g5.xlarge instance type to a regional reserved instance that is scoped to the China (Hangzhou) region and can match three pay-as-you-go instances of the ecs.g5.2xlarge instance type.

"RegionId":"cn-hangzhou", //The ID of the region.
"ReservedInstanceId":["ecsri-bp1hd03e9uv16b77****"], //The ID of the reserved instance whose scope you want to change.
"Configuration":[
  {
    "ReservedInstanceName":"testReservedInstanceName", //The name of the new reserved instance.
    "InstanceType":"ecs.g5.2xlarge", //The instance type that the new reserved instance can match.
    "Scope":"Region", //The scope level of the new reserved instance.
    "InstanceAmount":3 //The number of pay-as-you-go instances of the specified instance type that the new reserved instance can match.
  }
]