Overview

After you log in to FusionInsight Manager, the Homepage is displayed by default. You can view key information in the Alarms, System, and Cluster modules on the homepage.

On the upper right corner of the homepage, you can view the number of alarms of different severities, number of running tasks, current user, and help information.

Click to view the task name, status, progress, start time, and end time of the last 100 operation tasks in Task Management Center.

For a start, stop, restart, or rolling restart task, you can abort it by clicking the task name in the task list, clicking Abort, and then entering the system administrator password in the dialog box that is displayed. An aborted task is no longer executed.

Click

to obtain help information.

**Table 1** Help information
Item	Description
About	Provides the FusionInsight Manager version information.

Icons of services contained in the current cluster are displayed in on the left of the home page. You can click to view the service names and statuses.
The taskbar at the bottom of the home page displays the language options of FusionInsight Manager and the current cluster time and time zone information. You can switch the system language as needed.

Key Alarm Information

The Alarm module displays key alarm information about the current cluster.

Statistics: collects statistics on the number of new alarms on the current day, number of uncleared alarms in the last seven days, and number of new alarms in the last seven days.
Trend: displays the change trend of new and uncleared alarms over time. You can filter the alarm severity and time to display.
Top: displays the top 10 uncleared alarms ranked by occurrences.

Figure 1 Key alarm information

Key Cluster Information and Operations

The key information about the cluster is displayed in the upper right corner of the home page. The information is as follows:

Cluster: name of the current cluster
Host: number of hosts in the current cluster.
Yarn Running Tasks: number of Yarn tasks running in the current cluster. This parameter is available when the cluster contains the Yarn service.
HDFS File: number of HDFS files in the current cluster. This parameter is available when the cluster contains the HDFS service.
HDFS Disk Space: used HDFS disk space and total HDFS disk space of the current cluster. The value is in the format of Used HDFS disk space/Total HDFS disk space. This parameter is available when the cluster contains the HDFS service.

In this area, you can also start, stop, perform rolling restart, and synchronize configurations of the cluster, as shown in Table 2.

Figure 2 Key cluster information

**Table 2** Maintenance and management operations
Operation	Description
Downloading Client	Downloads the default client. For details, see Downloading the Client.
More > Start	Starts all services in the cluster.
More > Stop	Stops all services in the cluster.
More > Restart	Restarts all services in the cluster.
More > Rolling-restart Service	Restarts all services in the cluster at a time without interrupting workloads. For details about how to perform a rolling restart, see Performing a Rolling Restart of a Cluster.
More > Synchronize Configurations	Enables new configuration parameters for all services in the cluster.
More > Restart Configuration-Expired Instances	Restarts expired instances for all services in the cluster. For details, see Managing Expired Configurations.
More > Health Check	Performs a health check on the OMS nodes, all services, and the rest nodes in the cluster. There are three types of check items: running status, related alarms, and custom monitoring metrics. The health check results are not always the same as the values of Running Status displayed on the GUI. To export the result of the health check, click Export Report in the upper left corner. If any problem is detected, click Help.
More > Export Installation Template	Batch exports all installation configurations of the cluster, such as the cluster authentication mode, node information, and service configuration. You can use this function when you need to reinstall the cluster in the same environment.
More > Export Configurations	Batch exports configurations of all services in the cluster.
More > Enter/Exit Maintenance Mode	Enters or exits the cluster maintenance mode.
More > O&M View	Allows you to view services or hosts that are in the maintenance mode.

Key System Metrics

The System area on the homepage displays key metrics of the system.

Host Status and Type: displays the number of hosts in different states and types.
Peak Host CPU Usage: displays the peak CPU usage of the host over time.
Peak Host Disk Usage: displays the peak disk usage of the host over time.
Peak Host Memory Usage: displays the peak memory usage of the host over time.

You can select a time range for monitoring data in the upper right corner of the System area or click to customize a time range.

Figure 3 Key system metrics

Key Cluster Metrics

The Cluster area on the homepage displays key metrics of the cluster. You can customize monitoring reports to display in this area. For details about how to manage monitoring metrics, see Managing Monitoring Metric Reports.

You can view the data source of a monitoring chart in the lower left corner of the chart. You can zoom in on a monitoring report to view chart values more clearly or close the monitoring report.

Figure 4 Key cluster metrics

Service Status Preview Area

On the left of the homepage, you can view the status and alarms of each service installed in the current cluster.

The icon on the left of each service name indicates that the service is running properly; the icon indicates that the current service fails to start; and the icon indicates that the current service is not started.