Monitoring the Cluster

The Cluster Utilization pane in the Overview page displays the following for:

• CPU — Percentage of cores currently utilized and total cores
• Memory — Percentage of memory (in GB) currently utlized and total memory (in GB)
• Disk — Percentage of space (in GB) currently utilized and total disk space (in GB)

The Cluster Utilization pane also shows the amount of raw data and the savings (in percentage) after compression.

The Utilization Trend pane shows CPU, memory, and disk usage trend for the last 24 hours by default. You can select a preset (shown in the following screenshot) or specify a custom time range (shown in the following screenshot).

You can zoom in (by clicking and dragging the cursor in the pane) for a more granular view. Click Reset Zoom to zoom out and return to selected date/time range view. If there were any alarms during the selected date/time range, the Alarms pane above shows:

• When the alarm was raised
• The severity of the alarm
  • — an error
  • — a warning
  • — information

See Viewing Active Cluster Alarms for more information.

The basic command to retrieve cluster health and disk space information is:

maprcli dashboard info -cluster <cluster>

# /opt/mapr/bin/maprcli dashboard info -json
{
	"timestamp":1525230746268,
	"timeofday":"2018-05-01 08:12:26.268 GMT-0700 PM",
	"status":"OK",
	"total":1,
	"data":[
		{
			...
			"utilization":{
				"cpu":{
					"util":7,
					"total":8,
					"active":0
				},
				"memory":{
					"total":15886,
					"active":11281
				},
				"disk_space":{
					"total":273,
					"active":0
				},
				"compression":{
					"compressed":0,
					"uncompressed":0
				},
				"tiering":{
					"logicalUsed":0,
					"replicatedLogicalUsed":0,
					"replicatedTotalUsed":0,
					"ecTotalUsed":0,
					"cvTotalUsed":0,
					"offloaded":0,
					"recalled":0
				}
			},
			...
		}
	]
}