Viewing the Cluster Dashboard
Ambari Web UI displays the Dashboard page as the home page. Use Dashboard to view the operating status of your cluster.
The left side of Ambari Web displays the list of Hadoop services currently running in your cluster. Dashboard includes Metrics, Heatmaps, and Config History tabs; by default, the Metrics tab is displayed. On the Metrics page, multiple widgets, represent operating status information of services in your HDP 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
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