Creating a Hot Key Analysis Task

Function

This API is used to create a hot key analysis task. Redis 3.0 does not support hot key analysis.

To perform hot key analysis, the instance's maxmemory-policy parameter must be set to allkeys-lfu or volatile-lfu.

URI

POST /v2/{project_id}/instances/{instance_id}/hotkey-task

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID.
instance_id	Yes	String	Instance ID.

Request Parameters

None

Response Parameters

Status code: 200

**Table 2** Response body parameters
Parameter	Type	Description
id	String	Hot key analysis record ID.
instance_id	String	Instance ID.
status	String	Analysis task status. Enumeration values: waiting running success failed
scan_type	String	Analysis mode. Enumeration values: manual auto
created_at	String	Time when an analysis task is created. The format is "2020-06-15T02:21:18.669Z".
started_at	String	Time when an analysis task started. The format is "2020-06-15T02:21:18.669Z". (The value is null and is not returned when the analysis task is being created.)
finished_at	String	Time when an analysis task ended. The format is "2020-06-15T02:21:18.669Z". (The value is null and is not returned when the analysis task is being created.)
num	Integer	Number of hot keys.
keys	Array of HotkeysBody objects	Hot key record. (The value is null and is not returned when the analysis task is being created.)

**Table 3** HotkeysBody
Parameter	Type	Description
name	String	Key name.
type	String	Key type. Enumeration values: string list set zset hash
shard	String	Shard where the hot key is located. This parameter is supported only when the instance type is cluster. The format is ip:port.
db	Integer	Database where the hot key is located.
size	Integer	Size of the key value.
unit	String	Unit of the key size. When the key type is string, the unit is byte. When the key type is list, set, zset, or hash, the unit is count.
freq	Integer	Access frequency of a key within a specific period of time. The value is the logarithmic access frequency counter. The maximum value is 255, which indicates 1 million access requests. After the frequency reaches 255, the value will no longer increase even if access requests continue to increase. The value will decrease by 1 for every minute during which the key is not accessed.

Status code: 400

**Table 4** Response body parameters
Parameter	Type	Description
error_msg	String	Error message. Maximum: 1024
error_code	String	Error code. Maximum: 9
error_ext_msg	String	Extended error information. This parameter is not used currently and is set to null. Maximum: 1024

Status code: 401

**Table 5** Response body parameters
Parameter	Type	Description
error_msg	String	Error message. Maximum: 1024
error_code	String	Error code. Maximum: 9
error_ext_msg	String	Extended error information. This parameter is not used currently and is set to null. Maximum: 1024

Status code: 403

**Table 6** Response body parameters
Parameter	Type	Description
error_msg	String	Error message. Maximum: 1024
error_code	String	Error code. Maximum: 9
error_ext_msg	String	Extended error information. This parameter is not used currently and is set to null. Maximum: 1024

Status code: 404

**Table 7** Response body parameters
Parameter	Type	Description
error_msg	String	Error message. Maximum: 1024
error_code	String	Error code. Maximum: 9
error_ext_msg	String	Extended error information. This parameter is not used currently and is set to null. Maximum: 1024

Status code: 500

**Table 8** Response body parameters
Parameter	Type	Description
error_msg	String	Error message. Maximum: 1024
error_code	String	Error code. Maximum: 9
error_ext_msg	String	Extended error information. This parameter is not used currently and is set to null. Maximum: 1024

Example Requests

POST https://dcs.cn-south-1.myhuaweicloud.com/v2/a4d31cb6-3d72-4fdc-8ec9-6e3a41e47f71/instances/5560df16-cebf-4473-95c4-d1b573c16e79/hotkey-task

Example Responses

Status code: 200

Hot key analysis task created successfully.

{
  "id" : "aa735b6f-3d70-44e3-9771-66c6fae7459a",
  "instance_id" : "5560df16-cebf-4473-95c4-d1b573c16e79",
  "status" : "waiting",
  "scan_type" : "manual",
  "created_at" : "2020-06-15T02:21:18.669Z",
  "num" : 0
}

Status code: 400

Invalid request.

{
  "error_code" : "DCS.4922",
  "error_msg" : "Does not support hotkey analyze."
}

Status Codes

Status Code	Description
200	Hot key analysis task created successfully.
400	Invalid request.
401	Invalid authentication information.
403	The request is rejected.
404	The requested resource is not found.
500	Internal service error.