Oracle Fusion Middleware Documentation > Oracle WebLogic Server 12.1.3.0 Documentation > Administration Console Online Help > Configure cross-cluster replication

Administration Console Online Help

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Configure cross-cluster replication

Before you begin

WebLogic Server provides the ability to replicate HTTP session state across multiple clusters. This improves high-availability and fault tolerance by allowing clusters to be spread across multiple geographic regions, power grids, and internet service providers. WebLogic Server allows you to implement cross-cluster replication with a Metropolitan Area Network (MAN) or Wide Area Network (WAN) depending on your requirements and network configuration.

Before configuring cross-cluster replication using the Administration Console, you must set up your network environment, including hardware load balancers, WebLogic Server instances and clusters. If you are using cross-cluster replication within a WAN environment, you must also create and configure a data source. For more information, see Configuration Requirements for Cross-Cluster Replication in Administering Clusters for Oracle WebLogic Server.


To configure cross-cluster replication from the Administration Console:

  1. If you have not already done so, in the Change Center of the Administration Console, click Lock & Edit (see Use the Change Center).
  2. In the left pane of the Console, select Environment > Clusters.

    The Summary of Clusters table displays all the clusters defined in the domain.
  3. In the Clusters table, select the cluster for which you want to configure cross-cluster replication.
  4. Select Configuration > Replication.
    1. In Cross-Cluster Replication Type, select the type of cross-cluster replication you want to implement.
    2. In Remote Cluster Address, specify the address used to communicate with the secondary cluster.
    3. In Replication Channel, specify the network channel used to communicate with the secondary cluster.

      Note: Both the Remote Cluster Address and the Replication Channel setting should be configured so that communication between the primary and secondary cluster are not routed through the hardware load balancers.

    4. Optionally, define additional replication settings for this cluster or expand Advanced to define advanced settings.
  5. If you are configuring cross-cluster replication in a WAN environment, complete the following:
    1. In Data Source for Session Persistence, select the data source you want to use for session persistence.
    2. Expand Advanced and set the following parameters:
      • Session Flush Interval
      • Session Flush Threshold
      For more information on using these parameters to configure performance within a WAN environment, see WAN HTTP State Session Replication in Administering Clusters for Oracle WebLogic Server.
  6. To activate these changes, in the Change Center of the Administration Console, click Activate Changes.
    Not all changes take effect immediately—some require a restart (see Use the Change Center).

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