Hub Information

A hub is a robot that has additional responsibilities. Just as a robot manages probes, a hub manages robots. Every deployment has one or more hubs. All hubs perform these tasks:
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A hub is a robot that has additional responsibilities. Just as a robot manages probes, a hub manages robots. Every deployment has one or more hubs. All hubs perform these tasks:
  • Collect all messages
    coming from the robots
  • Quickly dispatch the messages
    to connected subscribers and/or queues
  • Maintain system information
    , such as name-tables
Hubs have the following designations depending on their purpose:
  • The
    Primary Hub
    communicates with the database. Every deployment has one, and only one, primary hub. This hub is created when you install the CA UIM server software.
  • Secondary hubs
    can be used to scan the network (device discovery), perform baseline calculations on QoS metrics, or group robots according to function, geographical location, departmental code, or other criteria. Although secondary hubs are optional, almost all deployments have them. Secondary hubs are created after the UIM server software is installed. They can be created or removed as needed to meet the needs of your IT environment.
  • A
    failover hub
    is a secondary hub that performs the primary hub’s actions if the primary hub changes state (becomes unavailable).
  • Tunnel hubs
    use VPN-like connections to communicate through firewalls.
For information about managing and configuring hubs, refer to the hub documentation on the Probes Documentation Space.