• MapReduce Service

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  2. MapReduce Service
  3. User Guide
  4. Cluster Operation Guide
  5. Cluster List

Cluster List

The cluster list contains all clusters in MRS. You can view clusters in various states. If a large number of clusters are involved, navigate through multiple pages to view all of the clusters.

MRS, as a platform managing and analyzing massive data, provides a PB-level data processing capability. Multiple clusters can be created. The cluster quantity is subject to the ECS quantity.

Active Cluster

Clusters are listed in chronological order by default in the cluster list, with the most recent cluster displayed at the top. Table 1 describes parameters of the cluster list.

  • Active Clusters: contains all clusters except the clusters in the Failed or Terminated state.
  • Failed Tasks: contains only the tasks in the Failed state. Task failures include:
    • Cluster creation failure
    • Cluster termination failure
    • Cluster capacity expansion failure
    • Cluster capacity shrink failure
Table 1 Parameters in the active cluster list

Parameter

Description

Name

Cluster name, which is set when a cluster is created.

ID

Unique identifier of a cluster, which is automatically assigned when a cluster is created.

Nodes

Number of nodes that can be deployed in a cluster. This parameter is set when a cluster is created.

NOTE:

A small value may cause slow cluster running. Properly set a value based on data to be processed.

Status

Status and operation progress description of a cluster.

The cluster creation progress includes:
  • Verifying cluster parameters
  • Applying for cluster resources
  • Creating VM
  • Initializing VM
  • Installing MRS Manager
  • Deploying cluster
  • Cluster installation failed
The cluster expansion progress includes:
  • Preparing for cluster expansion
  • Creating VM
  • Initializing VM
  • Adding node to the cluster
  • Cluster expansion failed
The cluster shrink progress includes:
  • Preparing for cluster shrink
  • Decommissioning instance
  • Deleting VM
  • Deleting node from the cluster
  • Cluster shrink failed

It displays causes of cluster installation, expansion, and shrink failures. For details, see Table 7.

Created

Time when MRS starts charging MRS clusters of the customer.

AZ

An availability zone of the working zone in the cluster, which is set when a cluster is created.

Operation

Terminate: If you want to terminate a cluster after jobs are complete, click Terminate. The cluster status changes from Running to Terminating. After the cluster is terminated, the cluster status will change to Terminated and will be displayed in Cluster History. If the MRS cluster fails to be deployed, the cluster is automatically terminated.

This parameter is displayed in Active Cluster only.
NOTE:

If a cluster is terminated before data processing and analysis are completed, data loss may occur. Therefore, exercise caution when terminating a cluster.

Table 2 Button description

Button

Description

In the drop-down list, select a state to filter clusters:

  • Active Cluster
    • All (Num): displays all existing clusters.
    • Starting (Num): displays existing clusters in the Starting state.
    • Running (Num): displays existing clusters in the Running state.
    • Expanding (Num): displays existing clusters in the Expanding state.
    • Shrinking (Num): displays existing clusters in the Shrinking state.
    • Abnormal (Num): displays existing clusters in the Abnormal state.
    • Terminating (Num): displays existing clusters in the Terminating state.
    • Frozen (Num): displays existing clusters in the Frozen state.

Click to open the page for managing failed task.

 Num: displays the failed tasks in the Failed state.

Enter a cluster name in the search bar and click to search for a cluster.

Click to manually refresh the cluster list.

Cluster History

Historical Cluster: contains only the clusters in the Failed or Terminated state. Only clusters terminated within the last six months are displayed. If you want to view clusters terminated six months ago, contact technical support engineers.

Table 3 Parameters in the historical cluster list

Parameter

Description

Name

Cluster name, which is set when a cluster is created.

Nodes

Number of nodes that can be deployed in a cluster. This parameter is set when a cluster is created.

NOTE:

A small value may cause slow cluster running. Properly set a value based on data to be processed.

Status

Status of a cluster

Created

Time when MRS starts charging MRS clusters of the customer.

Terminated

Termination time of a cluster, that is, time when charging for the cluster stops. This parameter is displayed in Cluster History only.

AZ

An availability zone of the working zone in the cluster, which is set when a cluster is created.

Table 4 Button description

Button

Description

Enter a cluster name in the search bar and click to search for a cluster.

Click to manually refresh the cluster list.