The Nodes dashboard provides detailed information about processes and services installed in one or multiple nodes. The following image displays the dashboard options.
You can view more using the following tabs.
- Acceldata Utilization
The Overall tab displays the following information of connected nodes.
The Services tile displays the list of services in the node and the count of nodes that are currently active. As an example, in the following screenshot,
AmbariAgent service is up on all 7 nodes and
FlumeAgent is down on one node.
Hover over the node count to view the nodes that are up or down.
The Utilization tile displays the heatmap of all connected nodes for the last one hour by default at a time interval of two minutes as shown in the following image.
To know more about a heatmap, see chart types.
To view statistics from a custom date range, click the icon and select a time frame and timezone of your choice.
For every node, you can view the heatmap for the following metrics.
To change the metric, click the drop-down next to the Metric label and click a metric of your choice.
|cpuUsage||The amount of CPU utilized (in %).|
|load||The average of the number of tasks waiting in a kernel run queue over a period of time.|
|memUsage||The amount of memory utilized (in %).|
|containerCount||The number of YARN containers running on a node.|
You can sort the Utilization heatmap by the following preferences.
To change the sorting, click the drop-down next to the Sort By label and click a sorting preference.
- Min Utilization
- Max Utilization
The Utilization table displays the following metrics for nodes.
|Select All box||The way to select all or deselect all rows. Click the box to select all or deselect all.|
|Host||The host name.|
|Application Status||The status of the application, either connected or disconnected.|
|Type||The type of node, either Compute Node or Data Node.|
|Load||The average of the number of tasks waiting in a kernel run queue over a period of time.|
|CPU Usage %||The amount of CPU utilized (in %).|
|Disk Usage %||The amount of disk utilized (in %).|
|Read Time||The time taken to perform read operations in the node.|
|Write Time||The time taken to perform write operations in the node.|
|Mem Usage %||The amount of memory utilized (in %).|
|# of Container||The number of YARN containers running on a node.|
|Logs||The log file of the node.|
To view aggregated summary details of two or more nodes, select any two more nodes from the Utilization table and click View Summary button.
The Acceldata Utilization tile displays the usage of the following Acceldata metrics on your cluster.
|Data In Out Per Sec||The amount of incoming and outgoing data. This data is tracked in the form of Received Bytes and Transfer Bytes.|
|Acceldata CPU Usage||The amount of CPU utilized. You can monitor the following CPU metrics.|
|Acceldata Memory Usage||The amount of memory utilized. You can monitor the following memory-related metrics.|
For Acceldata CPU usage and Memory usage charts, you can view the utilization by host. Click the drop-down in the top right corner of the chart and select a host.