下发重分布
功能介绍
该接口用于集群扩容后将老节点数据均匀分布到新扩节点的数据重分布操作,数据“重分布”后将大大提升业务响应速率。
重分布功能DWS 2.0 8.1.1.200及以上集群版本支持。
离线调度重分布模式在8.2.0及以上版本将不再支持。
只有在扩容之后,集群任务信息为“待重分布”状态时才能手动使用“重分布”功能,其他时段该功能不可使用。
在扩容阶段也可以选择重分布模式等高级配置,详情参见设置高级配置。
重分布队列的排序依据表的relpage大小进行,为确保relpage大小正确,建议在重分布之前对需要重分布的表执行analyze操作。
调用方法
请参见如何调用API。
URI
POST /v2/{project_id}/clusters/{cluster_id}/redistribution
请求参数
参数 |
是否必选 |
参数类型 |
描述 |
---|---|---|---|
redis_mode |
是 |
String |
参数解释: 重分布模式 约束限制: 不涉及。 取值范围: online:在线重分布; offline:离线重分布; 默认取值: offline |
parallel_jobs |
是 |
Integer |
参数解释: 重分布并发数。 约束限制: 不涉及。 取值范围: 4~200 默认取值: 4 |
响应参数
状态码:200
重分布下发成功。
无
请求示例
下发集群离线重分布任务,设置并发数为100。
POST https://{Endpoint}/v2/89cd04f168b84af6be287f71730fdb4b/clusters/e59d6b86-9072-46eb-a996-13f8b44994c1/redistribution { "redis_mode" : "offline", "parallel_jobs" : 100 }
响应示例
状态码:200
重分布下发成功。
{ }
SDK代码示例
SDK代码示例如下。
下发集群离线重分布任务,设置并发数为100。
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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.dws.v2.region.DwsRegion; import com.huaweicloud.sdk.dws.v2.*; import com.huaweicloud.sdk.dws.v2.model.*; public class ExecuteRedistributionClusterSolution { 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); DwsClient client = DwsClient.newBuilder() .withCredential(auth) .withRegion(DwsRegion.valueOf("<YOUR REGION>")) .build(); ExecuteRedistributionClusterRequest request = new ExecuteRedistributionClusterRequest(); request.withClusterId("{cluster_id}"); RedistributionReq body = new RedistributionReq(); body.withParallelJobs(100); body.withRedisMode(RedistributionReq.RedisModeEnum.fromValue("offline")); request.withBody(body); try { ExecuteRedistributionClusterResponse response = client.executeRedistributionCluster(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()); } } } |
下发集群离线重分布任务,设置并发数为100。
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# coding: utf-8 import os from huaweicloudsdkcore.auth.credentials import BasicCredentials from huaweicloudsdkdws.v2.region.dws_region import DwsRegion from huaweicloudsdkcore.exceptions import exceptions from huaweicloudsdkdws.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 = DwsClient.new_builder() \ .with_credentials(credentials) \ .with_region(DwsRegion.value_of("<YOUR REGION>")) \ .build() try: request = ExecuteRedistributionClusterRequest() request.cluster_id = "{cluster_id}" request.body = RedistributionReq( parallel_jobs=100, redis_mode="offline" ) response = client.execute_redistribution_cluster(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg) |
下发集群离线重分布任务,设置并发数为100。
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package main import ( "fmt" "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic" dws "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2" "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2/model" region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/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 := dws.NewDwsClient( dws.DwsClientBuilder(). WithRegion(region.ValueOf("<YOUR REGION>")). WithCredential(auth). Build()) request := &model.ExecuteRedistributionClusterRequest{} request.ClusterId = "{cluster_id}" request.Body = &model.RedistributionReq{ ParallelJobs: int32(100), RedisMode: model.GetRedistributionReqRedisModeEnum().OFFLINE, } response, err := client.ExecuteRedistributionCluster(request) if err == nil { fmt.Printf("%+v\n", response) } else { fmt.Println(err) } } |
更多编程语言的SDK代码示例,请参见API Explorer的代码示例页签,可生成自动对应的SDK代码示例。
状态码
状态码 |
描述 |
---|---|
200 |
重分布下发成功。 |
400 |
请求错误。 |
401 |
鉴权失败。 |
403 |
没有操作权限。 |
404 |
找不到资源。 |
500 |
服务内部错误。 |
503 |
服务不可用。 |