A replication entry (or replicator) is a run-time component that handles the transfer of internal WAS data.
WAS processes can connect to any replicator within a domain to receive data from other processes connected to any other replicator in the same domain. If the replicator a process is connected to goes down, the WAS process automatically attempts to reconnect to another replicator in the domain and recover data missed while unconnected.
One can define replicators to operate within a running application server process. Replicators are not enabled by default. You must define replicators as needed as part of appserver and cluster management.
One can take the default settings for replicators or specify settings values for replicators that better suit your server configuration. The default configuration options are suitable for many scenarios.