1.2. Widget Descriptions
The Dashboard includes metrics for the following services:
View Metrics that indicate the operating status of your cluster on the Ambari Dashboard. Each metrics widget displays status information for a single service in your HDP cluster. The Ambari Dashboard displays all metrics for the HDFS, YARN, HBase, and Storm services, and cluster-wide metrics by default.
![[Note]](../common/images/admon/note.png) | Note |
|---|---|
Metrics data for Storm is buffered and sent as a batch to Ambari every five minutes. After adding the Storm service, anticipate a five-minute delay for Storm metrics to appear. |
You can add and remove individual widgets, and rearrange the dashboard by dragging and dropping each widget to a new location in the dashboard.
Status information appears as simple pie and bar charts, more complex charts showing usage and load, sets of links to additional data sources, and values for operating parameters such as uptime and average RPC queue wait times. Most widgets display a single fact by default. For example, HDFS Disk Usage displays a load chart and a percentage figure. The Ambari Dashboard includes metrics for the following services:
Ambari Service Metrics and Descriptions
|
Metric: |
Description: |
|---|---|
|
HDFS | |
|
HDFS Disk Usage |
The Percentage of DFS used, which is a combination of DFS and non-DFS used. |
|
Data Nodes Live |
The number of DataNodes live, as reported from the NameNode. |
|
NameNode Heap |
The percentage of NameNode JVM Heap 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 (HDP 2.1 or later Stacks) | |
|
ResourceManager Heap |
The percentage of ResourceManager JVM Heap used. |
|
ResourceManager Uptime |
The ResourceManager uptime calculation. |
|
NodeManagers Live |
The number of DataNodes live, as reported from the ResourceManager. |
|
YARN Memory |
The percentage of available YARN memory (used vs. total available). |
|
HBase | |
|
HBase Master Heap |
The percentage of NameNode JVM Heap 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 (HDP 2.1 or later Stacks) | |
|
Supervisors Live |
The number of Supervisors live, as reported from the Nimbus server. |