Replication Server starts DSI threads to submit transactions to a replicate database to which it maintains a connection.
Each DSI thread is composed of a scheduler thread (DSI-S) and one or more executor threads (DSI-E). Each DSI executor thread opens an Open Client connection to a database.
To improve performance in sending transactions from a Replication Server to a replicate database it manages, you can configure a database connection so that transactions are applied using more than one DSI executor thread, that is by using parallel DSI threads.
Map functions using the function strings defined for the functions, according to the function-string class assigned to the database connection
Execute the transactions in the replicate database
Take action on any errors returned by the data server; depending on the assigned error actions, also record any failed transactions in the exceptions log
The DSI thread may apply a mixture of transactions from all primary databases supported by the Replication Server. The transactions are read from a single outbound stable queue for the replicate data server.