• MapReduce Service

mrs
  1. Help Center
  2. MapReduce Service
  3. User Guide
  4. Cluster Operation Guide
  5. Managing Active Clusters
  6. Viewing Basic Information About an Active Cluster

Viewing Basic Information About an Active Cluster

After clusters are created, you can monitor and manage clusters. Choose Clusters > Active Clusters. Select a cluster and click its name to switch to the cluster information page. Click Cluster Details to view information about a cluster such as the configurations, deployed nodes, and other basic information.

Table 1Table 2Table 3Table 4Table 5, and Table 6 describe the information about cluster configurations and nodes, respectively.

Table 1 Cluster configuration information

Parameter

Description

Cluster Name

Cluster name

This parameter is set when a cluster is created.

Cluster Status

Status of a cluster

Cluster Manager

Click View to open the Cluster Manager page.

Cluster Details

Cluster details include basic information, node information, and component information. You can click Cluster Details to hide information.

Table 2 Basic information

Parameter

Description

Cluster Version

MRS version

Currently, MRS 1.3.0, MRS 1.5.0 , MRS 1.6.0, MRS 1.6.3 and MRS 1.7.2 are supported.

This parameter is set when a cluster is created.

Cluster Type

MRS 1.5.0 or later provides two types of clusters:
  • Analysis cluster: is used for offline data analysis and provides Hadoop components.
  • Streaming cluster: is used for streaming tasks and provides stream processing components.

This parameter is set when a cluster is created.

Cluster ID

Unique identifier of a cluster

This parameter is automatically assigned when a cluster is created.

Created

Time when MRS starts charging MRS clusters of the customer

AZ

An availability zone of the working zone in the cluster

This parameter is set when a cluster is created.

VPC

VPC information

This parameter is set when a cluster is created.

A VPC is a secure, isolated, and logical network environment.

Subnet

Subnet information

This parameter is set when a cluster is created.

A subnet provides dedicated network resources that are isolated from other networks, improving network security.

Cluster Manager IP Address

Floating IP address for accessing MRS Manager

This parameter is displayed only after Kerberos authentication is enabled.

Key Pair

Key pair name

This parameter is set when a cluster is created.

Table 3 Node information

Parameter

Description

Master Node

Information about the Master node

Format: [instance specification | node quantity]

Core Node

Information about a Core node

Format: [instance specification | node quantity]

Task Node

Information about a Task node

Format: [instance specification | node quantity]

Active Master Node IP Address

IP address of the active Master node in a cluster, which is also the IP address of the active management node of MRS Manager.

Task Node Auto Scaling

Auto Scaling can automatically adjust computing resources based on customers' service requirements and preset policies. With auto scaling, the number of instances in MRS tasks can increase and decrease as the service load increases and decreases, ensuring smooth operation of services.

Table 4 Component information

Parameter

Description

Hadoop Version

Hadoop version

Spark Version

Spark version

Only a Spark cluster displays this version. Because Spark and Hive must be used together, Spark and Hive versions are displayed at the same time.

HBase Version

HBase version

Only an HBase cluster displays this version.

Hive Version

Hive version

Only a Hive cluster displays this version.

Hue Version

Hue version

For MRS 1.3.0, this parameter is displayed only after Kerberos authentication is enabled. For MRS 1.5.0 or later versions, this parameter is displayed without the limitation of Kerberos authentication.

Loader Version

Loader Version

This parameter is displayed when the MRS version is MRS 1.5.0 or later.

Kafka Version

Kafka Version

Only a Kafka cluster displays this version.

Storm Version

Storm Version

Only a Storm cluster displays this version.

Flume Version

Flume Version

This parameter is displayed when the MRS version is MRS 1.5.0 or later.

Kerberos Authentication

Indicates whether to enable Kerberos authentication when logging in to MRS Manager.

Logging

Indicates whether the tenant has enabled the log collection function.

Table 5 Node description

Parameter

Description

Resize Cluster

For details about adding or deleting a Core/Task node to a cluster, see Expanding a Cluster or Shrinking a Cluster. This applies to MRS 1.6.3 or later.

Resize Cluster is unavailable and capacity expansion or reduction is not allowed in any of the following situations:

  • The cluster is not in the running state.
  • The number of Core nodes or Task nodes exceeds the maximum value (500).
  • The cluster charging mode is not on-demand.

Add Node

For details about adding or deleting a Core node to a cluster, see Expanding a Cluster. This applies to MRS 1.6.3 or earlier.

Add Node is unavailable and capacity expansion is not allowed in any of the following situations:

  • The cluster is not in the running state.
  • The number of Core nodes exceeds the maximum value (100).
  • The cluster charging mode is not on-demand.

Name

Name of a cluster node

Status

Status of a cluster

Type

Node type

  • Master

    A Master node in an MRS cluster manages the cluster, assigns MapReduce executable files to Core nodes, traces the execution status of each job, and monitors DataNode running status.

  • Core

    A Core node in a cluster processes data and stores processed data in HDFS.

  • Task

    A Task node in a cluster is used for computing and does not store persistent data. Task nodes are optional, and the number of Task nodes can be zero. (Task nodes are supported by MRS 1.6.0 or later.)

IP Address

IP address of a cluster node

Configuration

Instance specifications of a node

This parameter is determined by the CPU, memory, and disks used.

NOTE:

More advanced instance specifications allow better data processing.

Default Security Group

Security group name for master and Core/Task nodes, which are automatically assigned when a cluster is created.

This is the default security group. Do not modify or delete the security group because modifying or deleting it will cause a cluster exception.

Table 6 Button description

Button

Description

Click to manually refresh the node.