Communication between the Advanced Replication master database and its replicas is based on asynchronous store and forward messaging. The messages are extensions to solidDB SQL.

Each message is assembled dynamically and can contain numerous synchronization tasks. For example, you can propagate multiple transactions from a replica database to the master database and request refreshes from numerous publications from the master database in one message.

The messages from the replica database are sent asynchronously to the master database. Built-in message queuing capabilities ensure that no message is deleted from the sending server before the entire message has arrived at the receiving server.