6.2. Web UI: Using the Topology Graph to Manage Replication Topology
Accessing the Topology Graph
- Select→ → .
- If you make any changes to the topology that are not immediately reflected in the graph, click.
Customizing the Topology View
Figure 6.3. Moving Topology Graph Nodes
Figure 6.4. Zooming the Topology Graph
Figure 6.5. Moving the Topology Graph Canvas
Interpreting the Topology Graph
- Topology graph example: recommended topology
- Figure 6.6, “Recommended Topology Example” shows one of the possible recommended topologies for four servers: each server is connected to at least two other servers, and more than one server is a CA master.
Figure 6.6. Recommended Topology Example
- Topology graph example: discouraged topology
- In Figure 6.7, “Discouraged Topology Example: Single Point of Failure”,
server1is a single point of failure. All the other servers have replication agreements with this server, but not with any of the other servers. Therefore, if
server1fails, all the other servers will become isolated.Avoid creating topologies like this.
Figure 6.7. Discouraged Topology Example: Single Point of Failure
6.2.1. Setting up Replication Between Two Servers
- In the topology graph, hover your mouse over one of the server nodes.
Figure 6.8. Domain or CA Options
- Click on the domain or the ca part of the circle depending on what type of topology segment you want to create.
- A new arrow representing the new replication agreement appears under your mouse pointer. Move your mouse to the other server node, and click on it.
Figure 6.9. Creating a New Segment
- In the Add Topology Segment window, click to confirm the properties of the new segment.
Figure 6.10. New Segment Created
6.2.2. Stopping Replication Between Two Servers
- Click on an arrow representing the replication agreement you want to remove. This highlights the arrow.
Figure 6.11. Topology Segment Highlighted
- In the Confirmation window, click .
Figure 6.12. Topology Segment Deleted