Performing a Redistribution Task

Function

This API is used to evenly distribute data from old nodes to new nodes after cluster scale-out. After data redistribution, the service response speed is greatly improved.

The redistribution function is supported by DWS clusters of version 2.0 8.1.1.200 or later.

Offline scheduling is not supported in 8.2.0 or later.

This function can be manually enabled only when the cluster task information displays To be redistributed after scale-out.

You can also select the redistribution mode when you configure cluster scale-out (see Configure advanced parameters).

Redistribution queues are sorted based on the relpage size of tables. To ensure that the relpage size is correct, you are advised to perform the ANALYZE operation on the tables to be redistributed.

Calling Method

For details, see Calling APIs.

URI

POST /v2/{project_id}/clusters/{cluster_id}/redistribution

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Definition Project ID. To obtain the value, see Obtaining a Project ID. Constraints N/A Range N/A Default Value N/A
cluster_id	Yes	String	Definition Cluster ID. For details about how to obtain the value, see Obtaining the Cluster ID. Constraints N/A Range N/A Default Value N/A

Request Parameters

**Table 2** Request body parameters
Parameter	Mandatory	Type	Description
redis_mode	Yes	String	Definition Redistribution mode. Constraints N/A Range online offline Default Value offline
parallel_jobs	Yes	Integer	Definition Redistribution concurrency. Constraints N/A Range 4 to 200 Default Value 4

Response Parameters

Status code: 200

Redistribution task submitted.

None

Example Requests

Perform offline cluster redistribution task and set the number of concurrent tasks to 100.

POST https://{Endpoint}/v2/89cd04f168b84af6be287f71730fdb4b/clusters/e59d6b86-9072-46eb-a996-13f8b44994c1/redistribution

{
  "redis_mode" : "offline",
  "parallel_jobs" : 100
}

Example Responses

Status code: 200

Redistribution task submitted.

{ }

Status Codes

Status Code	Description
200	Redistribution task submitted.
400	Request error.
401	Authentication failed.
403	You do not have required permissions.
404	No resources found.
500	Internal server error.
503	Service unavailable.