The MapR Control System gives you power at a glance over the entire cluster. With the MapR Control System, you can see immediately which nodes are healthy; how much bandwidth, disk space, and CPU time are in use; and the status of MapReduce jobs. But there's more: the MapR Control System lets you manage your data in ways that were previously impossible with Hadoop. During the next few exercises, you will learn a few of the easy, powerful capabilities of MapR.
- Open a browser and navigate to the MapR Control System on the server where you installed MapR. The URL is
Your computer won't have an HTTPS certificate yet, so the browser will warn you that the connection is not trustworthy. You can safely ignore the warning this time.
- Log in using the Linux username and password you specified as the administrative user in Step 3.
Welcome to the MapR Control System, which displays information about the health and performance of the cluster. Notice the navigation pane to the left and the larger view pane to the right. The navigation pane lets you quickly switch between views, to display different types of information.
When the MapR Control System starts, the first view displayed is the Dashboard. The MapR single node is represented as a square. The square is not green; the node health is not perfect: because the license has not yet been applied, the NFS service has failed to start, resulting in an alarm on the node. Later, you'll see how to obtain the license and mount the cluster with NFS.
Click the node to display the Node Properties view. Notice the types of information available about the node:
- Alarms - timely information about any problems on the node
- Machine Performance - resource usage
- General Information - physical topology of the node and the times of the most recent heartbeats
- MapReduce - map and reduce slot usage
- Manage Node Services - services on the node
- MapR-FS and Available Disks - disks used for storage by MapR
- System Disks - disks available to add to MapR storage
Next: Adding a License