Cluster
Cluster related Viewer Variables
When Clusters are created in PADS4 CTRL Center, system-defined Viewer Variables are automatically available. These variables help control content distribution across Clustered Viewers based on their position and availability.
System-Defined Cluster Viewer Variables
| Variable | Description |
|---|---|
| ClusterWidth | Total number of horizontal Viewers in the Cluster. |
| ClusterHeight | Total number of vertical Viewers in the Cluster. |
| HorizontalPosition | Defines the current page number that should be displayed based on viewer availability in a horizontally aligned Cluster. Adjusts dynamically when Viewers go offline. |
| VerticalPosition | Defines the current page number that should be displayed based on viewer availability in a vertically aligned Cluster. Adjusts dynamically when Viewers go offline. |
| IndexX | The designed horizontal position of this Viewer within the Cluster. |
| IndexY | The designed vertical position of this Viewer within the Cluster. |
Example Cluster Configuration
The example below illustrates a 2x2 Cluster with 4 Viewers.
| Cluster Viewers | Horizontal Position | Vertical Position | IndexX | IndexY |
|---|---|---|---|---|
| Cluster Viewer 1 | 1 | 1 | 0 | 0 |
| Cluster Viewer 2 | 2 | 3 | 1 | 0 |
| Cluster Viewer 3 | 3 | 2 | 0 | 1 |
| Cluster Viewer 4 | 4 | 4 | 1 | 1 |
How These Variables Work in a Cluster
-
Dynamic Page Assignment:
- If Viewer 2 goes offline, Viewer 3 or Viewer 4 will automatically take over its content.
- If a Viewer is removed or disabled, PADS4 automatically reassigns the correct page positions.
-
Intelligent Content Distribution:
- HorizontalPosition ensures content is evenly distributed when a Viewer is removed.
- VerticalPosition helps determine which upper Viewers’ content moves down if a screen fails.
-
Flexible Layout Customization:
- IndexX/IndexY allow precise control over the placement of Viewers within a Cluster.
- Adjustments can be rule-based, ensuring smooth failover handling.
Practical Use Cases
- Airport Flight Information Displays: Ensures continuous flight listings across multiple screens.
- Menu Boards in Restaurants: Automatically shifts menu content if one screen fails.
- Retail Digital Signage: Prevents content gaps and adjusts layout dynamically.
By utilizing these Cluster Viewer Variables, you can optimize digital signage layouts, reduce downtime, and automate content distribution across your PADS4 system.