This API is used to change the number of partitions in a specific stream.

For details, see Calling APIs.

PUT /v2/{project_id}/streams/{stream_name}

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID
stream_name	Yes	String	Name of the stream whose partition quantity needs to be changed Maximum: 64

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token. It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is the user token.

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
stream_name	Yes	String	Name of the stream whose partition quantity needs to be changed Maximum: 64
target_partition_count	Yes	Integer	Number of the target partitions. The value is an integer greater than 0. If the value is greater than the number of current partitions, scaling-up is required. If the value is less than the number of current partitions, scale-down is required. Notes: Each stream can be scaled up and down a total of five times within one hour. After the stream is successfully scaled up or down, it cannot be scaled up or down again within the next one hour. Minimum: 0

None

Changing Partition Quantity

PUT https://{Endpoint}/v2/{project_id}/streams/{stream_name}

{
  "stream_name" : "newstream",
  "target_partition_count" : 5
}

None

Status Code	Description
200	Normal response