With a dashboard, different graphs such as line graphs and digit graphs are displayed on the same screen, which lets you view comprehensive monitoring data.

For example, you can add key metrics of important resources to the dashboard for real-time monitoring. You can also compare the same metric for different resources on one GUI. In addition, you can add routine O&M metrics to the dashboard so that you can perform routine check without re-selecting metrics when you re-open AOM.

Before creating a dashboard, learn the types of graphs that can be added to the dashboard for accurate resource monitoring. The following graphs can be added to the dashboard:

Metric Data Graphs (Including Line and Digit Graphs)

Line graph: displays the metric data trend by time. Use this type of graph to monitor the metric data trend of one or more resources in a period.
You can use a line graph to compare the same metric of different resources. The following figure shows the total CPU cores of different components.

Figure 1 Line graph
Digit graph: displays the latest value of a metric in real time.
The following figure shows the average uplink rate (BPS) of a component.

Figure 2 Digit graph

Health Status Graphs (Including Threshold, Host, and Component Status Graphs)

The status of thresholds, hosts, and components can be displayed. The status of one or more threshold rules, hosts, or components can be added to one graph for monitoring.

Threshold-crossing status graph: monitors the status of threshold rules in real time.
Figure 3 Threshold status graph

Before adding a threshold status graph, ensure that you have created a threshold rule. Otherwise, such a graph cannot be added.
Host status graph: monitors the host status in real time.
Figure 4 Host status graph
Component status graph: monitors the component status in real time.
Figure 5 Component status graph

Top N Resource Graphs

For top N resource graphs, the statistical unit is a cluster and statistical objects are resources such as hosts, components, or instances in the cluster. A top N resource graph shows the top N resources in a cluster in a visualized manner. Both the top 5 and top 15 resources can be displayed. By default, the top 5 resources are displayed. After the graph is zoomed in, the top 15 resources are displayed.

To quickly view the top N resources, add a top N graph to the dashboard. You only need to select resources and metrics, for example, host CPU usage. AOM then automatically singles out top N hosts for display. If the number of resources is less than N, actual resources are displayed. The following figure shows the top 5 hosts with the highest CPU usage.

Figure 6 Top N resource graph

By default, the top 5 resources are displayed. To view the top 15 resources, click Top 15 xxx, double-click the graph, or click View Larger in the Operation column.
To monitor the top 5 resources among all clusters, view them on the O&M page. Alternatively, add the corresponding graph on the O&M page to the dashboard.
You can customize the title of the top N resource graph. By default, the title is resource type(cluster name).

Precautions

A maximum of 50 dashboards can be created in a region.
A maximum of 20 graphs can be added to a dashboard.
A maximum of 10 resources can be added to a line graph, and resources can be selected across clusters.
Only one resource can be added to a digit graph.
A maximum of 10 threshold rules can be added to a threshold-crossing status graph.
A maximum of 10 hosts can be added to a host status graph.
A maximum of 10 components can be added to a component status graph.

Creating a Dashboard

In the navigation pane, choose Overview > Dashboard.
On the Dashboard page, click Create Dashboard. In the displayed Create Dashboard dialog box, enter a dashboard name and click OK.
Add a metric graph to the dashboard. The dashboard supports the following graphs: line graphs, digit graphs, threshold-crossing status graphs, host status graphs, and component status graphs. Select a graph that meets your requirements.
The following shows how to add a line graph to a dashboard:
1. On the Dashboard page, click Add Metric Graph. In the displayed Select Which to Add dialog box, click Create below Metric Data.
2. Select the type of the graph: In the displayed Add Metric Graph dialog box, select Line graph and then click Next.
3. Select the metrics and set Statistical Mode and Statistical Cycle, and click OK.
  Figure 7 Adding a metric graph
Click Save in the upper right corner of the Dashboard page.
Enable Auto Refresh () in the upper right corner of the Dashboard page so that all graphs in the dashboard can be refreshed automatically.
- On (default)
  Data in the dashboard will be automatically refreshed each minute.
- Off
  Data in the dashboard will not be automatically refreshed.

More Operations

After creating a dashboard, perform the operations listed in Table 1 if needed.

**Table 1** Related operations
Object	Operation	Description
Dashboard	Save as	Click More in the upper right corner, and choose Save As, Rename, or Delete from the drop-down list.
	Rename
	Delete
	Export a monitoring report	Click Export Monitoring Report to export a line graph in the dashboard as a CSV file to a local PC.
	Set the full-screen online duration	Select the target dashboard and click in the upper right corner of the Dashboard page. In the dialogue box that is displayed, set the full-screen online duration. Figure 8 Setting the online duration NOTE: Custom: The default online duration is 1 hour. You can enter 1–24 (unit: hour) in the text box. For example, if you enter 2 in the text box, the login page is automatically displayed 2 hours later. Always online: The full-screen online duration is not restricted. That is, you can always implement full-screen monitoring and the login page will never be displayed. Rotation Period: Set Rotation Period and Dashboard if rotation display is enabled. Range: 10s (default) to 120s. Click OK to enter the full-screen mode.
	Set an interpolation mode	Click Interpolation Mode to set a mode for aggregating metric data. By default, AOM uses null to represent breakpoints in a metric graph. However, a metric graph with breakpoints is not suitable for reporting or presentation. To solve the problem, set Interpolation Mode to 0 or null to interpolate values. In this way, you can replace the missing metric data and avoid breakpoints. You can set Interpolation Mode to null, or 0. null: Breakpoints are represented by null by default. 0: Breakpoints are indicated by 0.
Graph	Add	Click Add Metric Graph to add a line graph, digit graph, threshold-crossing status graph, host status graph, or component status graph to the dashboard.
	Edit	Choose Edit, Copy, Delete, and View Larger (only a line graph can be enlarged) from the Operation column. The Time Select option is available only in a line graph. This option allows you to set a temporary time range and statistical cycle so that you can view the resource data within a specified time range. Figure 9 Operations on a graph NOTE: In the dashboard, when resources such as hosts and components are deleted, graphs created for these resources are not automatically deleted. To improve system performance, manually delete unnecessary graphs.
	Copy
	Delete
	Zoom in
	Time select
	Refresh
	Resize	Move the cursor to the lower right corner of a graph. When the cursor changes to , hold down your left mouse button to resize the graph.
	Reposition	Put the cursor at the blank area in the upper or lower part of a graph, and drag and drop it to the desired position.