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