Managing and Monitoring a Cluster
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Open the cluster dashboard

Use the Ambari Web Dashboard to monitor operating status of your cluster.

Ambari Web displays the Dashboard page as the home page.
In Ambari Web, click Dashboard to view the operating status of your cluster.
Dashboard includes three options:
  • Metrics
  • Heatmaps
  • Config History
The Metrics option displays by default. On the Metrics page, multiple widgets represent operating status information of services in your cluster. Most widgets display a single metric; for example, HDFS Disk Usage represented by a load chart and a percentage figure:


Metrics Widgets and Descriptions:

HDFS metrics

HDFS Disk Usage
The percentage of distributed file system (DFS) used, which is a combination of DFS and non-DFS used
Data Nodes Live
The number of DataNodes operating, as reported from the NameNode
NameNode Heap
The percentage of NameNode Java Virtual Machine (JVM) heap memory used
NameNode RPC
The average RPC queue latency
NameNode CPU WIO
The percentage of CPU wait I/O
NameNode Uptime
The NameNode uptime calculation

YARN metrics (HDP 2.1 or later stacks)

ResourceManager Heap
The percentage of ResourceManager JVM heap memory used
ResourceManager Uptime
The ResourceManager uptime calculation
NodeManagers Live
The number of DataNodes operating, as reported from the ResourceManager
YARN Memory
The percentage of available YARN memory (used versus. total available)

HBase metrics

HBase Master Heap
The percentage of NameNode JVM heap memory used
HBase Ave Load
The average load on the HBase server
HBase Master Uptime
The HBase master uptime calculation
Region in Transition
The number of HBase regions in transition

Storm metrics (HDP 2.1 or later stacks)

Supervisors Live
The number of supervisors operating as reported by the Nimbus server