LTM is the replication agent for SQL Server databases. LTM notifies Replication Server of actions in a database that must be replicated to other databases. LTM reads the database transaction log and transfers log records for replicated tables and stored procedures to the Replication Server managing the database. The Replication Server distributes the modifications to sites with subscriptions for the data.
An LTM is needed for every database that contains primary data and for every database where asynchronous procedures are executed. A database that contains only copies of replicated data and contains no asynchronous procedures does not require an LTM.
See “LTM processing data flow” for a description of how LTM reads transaction information in the SQL Server, formats it, and submits it to Replication Server.
