In the VMware GemFire Management Console, the Multi-site in feature enables users to effortlessly monitor gateway senders and receivers while visualizing the interconnected network, streamlining management tasks and enhancing understanding of cluster dynamics for more informed decision-making.

Multi-site functionality provides users with two distinct views of interconnected clusters over a Wide Area Network (WAN):

  • Table View: This view presents a comprehensive overview of gateway senders and receivers currently configured across cluster members. It allows users to manage their senders and receivers, including options to stop, start, pause, and resume their operations.

  • Topology Explorer: Users can visualize their cluster network architecture through a graphical representation, gaining insights into the interconnections among their clusters.

Table View

The Table View gives users an overview of gateway senders and receivers configured across cluster members and offers management capabilities for senders and receivers.

To use the Table View, select a cluster from the provided list, which encompasses all clusters connected to the GemFire Management Console. After selecting a cluster, two tables are displayed: Gateway Senders and Gateway Receivers. These tables provide information regarding the configured senders and receivers within the selected cluster.

Gateway Senders

The Gateway Senders table displays a detailed list of senders configured for the selected cluster. Users can access information about each gateway sender, including:

  • Sender ID
  • Hosting Member
  • Sender Type (Parallel or Serial)
  • Current Status
  • Queued Events (if any)
  • Distributed ID, IP address/Hostname, and Port number of the connected cluster

Users can also manage the functionality for the gateway senders, including the ability to stop, start, pause, resume, and load balance them. The availability of these options is dynamically adjusted based on the selected senders and their respective statuses. For instance, a “Paused” sender can only be resumed or stopped. Selecting multiple senders with varying statuses may lead to certain management options being disabled.

Note: The status of a gateway sender may take a moment to synchronize within the cluster. In cases where the displayed status does not align with the expected status, use the refresh button to update the table.

Gateway Receivers

The Gateway Receivers table provides insights into the receivers configured within the selected cluster including:

  • Hosting Member
  • Receiving Port
  • Number of connected senders
  • List of connected receivers
  • Current Status of the receiver

Using the controls above the table, users can stop and start the gateway receivers.

Note: The status of a gateway receiver may take a moment to synchronize within the cluster. In cases where the displayed status does not align with the expected status, use the refresh button to update the table.

Topology Explorer

The Topology Explorer provides users with a graphical representation of the interconnected GemFire clusters within their network. It offers a visual understanding of the architecture and connections between clusters, aiding in comprehensive network management and troubleshooting.

To access the Topology Explorer, navigate to the Multi-site section of the GemFire Management Console and select Topology Explorer.

Understanding the Interface

When you access the Topology Explorer, a Starting Cluster is automatically selected. This cluster is the initial perspective from which the network visualization diagram is generated. The diagram represents an overview of the entire network topology, providing a high-level view of cluster distribution and interconnections, given the information available.

Cluster Visualization

Each cluster is represented as a distinct node within the interface. Depending on the available information, the cluster label may include:

  • The cluster nickname
  • The cluster distributed system ID (DSID)
  • The member ID

Cluster Connections

Connections between clusters are depicted as arrows, symbolizing the flow of data between them. These arrows are color-coded to convey the status of the connection:

  • Green: Indicates a functional connection with both sender and receiver operating as expected.

  • Yellow: Indicates that some senders and receivers are functioning incorrectly and further analysis is required.

  • Red: Indicates a total connection loss between clusters.

Users can click on these connections to access detailed information about the connection. A table displays additional details about the clusters gateway senders, including:

  • ID: The identifier of the sender.
  • Member: The member on which the sender is running.
  • Queued Events: The number of events queued for sending to the receiver.
  • Overflowing to Disk: Whether or not the sender queue has exceeded memory capacity and is overflowing to disk.
  • Connection Status: The connectivity status between the sender and receiver.
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