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.
Calling Method
For details, see Calling APIs.
URI
POST /v2/{project_id}/instances/{instance_id}/hotkey-task
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
project_id |
Yes |
String |
Project ID. For details, see Obtaining a Project ID. |
instance_id |
Yes |
String |
Instance ID. |
Request Parameters
None
Response Parameters
Status code: 200
Parameter |
Type |
Description |
---|---|---|
id |
String |
Hot key analysis record ID. |
instance_id |
String |
Instance ID. |
status |
String |
Analysis task status. |
scan_type |
String |
Analysis method. |
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.) |
Parameter |
Type |
Description |
---|---|---|
name |
String |
Key name. |
type |
String |
Key type. |
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 a hot key is located. |
size |
Long |
Size of the key value. |
unit |
String |
Key unit. count: number of keys; byte: key size. |
freq |
Integer |
Reflects the 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
Parameter |
Type |
Description |
---|---|---|
error_msg |
String |
Error message. |
error_code |
String |
Error code. |
error_ext_msg |
String |
Extended error information. This parameter is not used currently and is set to null. |
Status code: 401
Parameter |
Type |
Description |
---|---|---|
error_msg |
String |
Error message. |
error_code |
String |
Error code. |
error_ext_msg |
String |
Extended error information. This parameter is not used currently and is set to null. |
Status code: 403
Parameter |
Type |
Description |
---|---|---|
error_msg |
String |
Error message. |
error_code |
String |
Error code. |
error_ext_msg |
String |
Extended error information. This parameter is not used currently and is set to null. |
Status code: 404
Parameter |
Type |
Description |
---|---|---|
error_msg |
String |
Error message. |
error_code |
String |
Error code. |
error_ext_msg |
String |
Extended error information. This parameter is not used currently and is set to null. |
Status code: 500
Parameter |
Type |
Description |
---|---|---|
error_msg |
String |
Error message. |
error_code |
String |
Error code. |
error_ext_msg |
String |
Extended error information. This parameter is not used currently and is set to null. |
Example Requests
POST https://{dcs_endpoint}/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." }
SDK Sample Code
The SDK sample code is as follows.
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package com.huaweicloud.sdk.test; import com.huaweicloud.sdk.core.auth.ICredential; import com.huaweicloud.sdk.core.auth.BasicCredentials; import com.huaweicloud.sdk.core.exception.ConnectionException; import com.huaweicloud.sdk.core.exception.RequestTimeoutException; import com.huaweicloud.sdk.core.exception.ServiceResponseException; import com.huaweicloud.sdk.dcs.v2.region.DcsRegion; import com.huaweicloud.sdk.dcs.v2.*; import com.huaweicloud.sdk.dcs.v2.model.*; public class CreateHotkeyScanTaskSolution { public static void main(String[] args) { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment String ak = System.getenv("CLOUD_SDK_AK"); String sk = System.getenv("CLOUD_SDK_SK"); String projectId = "{project_id}"; ICredential auth = new BasicCredentials() .withProjectId(projectId) .withAk(ak) .withSk(sk); DcsClient client = DcsClient.newBuilder() .withCredential(auth) .withRegion(DcsRegion.valueOf("<YOUR REGION>")) .build(); CreateHotkeyScanTaskRequest request = new CreateHotkeyScanTaskRequest(); request.withInstanceId("{instance_id}"); try { CreateHotkeyScanTaskResponse response = client.createHotkeyScanTask(request); System.out.println(response.toString()); } catch (ConnectionException e) { e.printStackTrace(); } catch (RequestTimeoutException e) { e.printStackTrace(); } catch (ServiceResponseException e) { e.printStackTrace(); System.out.println(e.getHttpStatusCode()); System.out.println(e.getRequestId()); System.out.println(e.getErrorCode()); System.out.println(e.getErrorMsg()); } } } |
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# coding: utf-8 import os from huaweicloudsdkcore.auth.credentials import BasicCredentials from huaweicloudsdkdcs.v2.region.dcs_region import DcsRegion from huaweicloudsdkcore.exceptions import exceptions from huaweicloudsdkdcs.v2 import * if __name__ == "__main__": # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak = os.environ["CLOUD_SDK_AK"] sk = os.environ["CLOUD_SDK_SK"] projectId = "{project_id}" credentials = BasicCredentials(ak, sk, projectId) client = DcsClient.new_builder() \ .with_credentials(credentials) \ .with_region(DcsRegion.value_of("<YOUR REGION>")) \ .build() try: request = CreateHotkeyScanTaskRequest() request.instance_id = "{instance_id}" response = client.create_hotkey_scan_task(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg) |
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package main import ( "fmt" "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic" dcs "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dcs/v2" "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dcs/v2/model" region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dcs/v2/region" ) func main() { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak := os.Getenv("CLOUD_SDK_AK") sk := os.Getenv("CLOUD_SDK_SK") projectId := "{project_id}" auth := basic.NewCredentialsBuilder(). WithAk(ak). WithSk(sk). WithProjectId(projectId). Build() client := dcs.NewDcsClient( dcs.DcsClientBuilder(). WithRegion(region.ValueOf("<YOUR REGION>")). WithCredential(auth). Build()) request := &model.CreateHotkeyScanTaskRequest{} request.InstanceId = "{instance_id}" response, err := client.CreateHotkeyScanTask(request) if err == nil { fmt.Printf("%+v\n", response) } else { fmt.Println(err) } } |
For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.
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. |
Error Codes
See Error Codes.
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