Integration Server versions

One Integration Server in the cluster cannot be version 9.0 and another Integration Server in the cluster be version 9.5.

Adapter packages

All adapter packages on one Integration Server should be replicated to all other Integration Servers in the cluster.

Adapter versions

All Integration Servers in the cluster must have the same version of an adapter, with the same fixes (updates and service packs) applied.

Adapter connections

If you configure a connection to the back end, this connection must appear on all servers in the cluster so that any Integration Server in the cluster can handle a given request identically.

If you plan to use connection pools in a clustered environment, see Considerations when Configuring Connections with Connection Pooling Enabled.

Adapter services

If you configure a specific adapter service, this service must appear on all servers in the cluster so that any Integration Server in the cluster can handle the request identically.

If you allow different Integration Servers to contain different services, you might not derive the full benefits of clustering. For example, if a client requests a service that resides on only one server, and that server is unavailable, the request cannot be successfully redirected to another server.

Adapter notifications

If you configure a specific adapter notification, this notification must appear on all servers in the cluster.

For more information about adapter notifications in a cluster, see Polling Notification Support in a Cluster and Adapter Listener Support in a Cluster.