Relationship with Replication Agents

While Replication Server is extensible (with customizable function strings and error handling, custom datatype definitions, and translations between datatypes) to meet the needs of replicate data servers, Replication Server support of primary data servers is limited.

The Replication Server interface for primary data servers is its proprietary Log Transfer Language (LTL). Transactions from a primary data server must be translated to LTL to be delivered to a primary Replication Server. Therefore, support for primary data servers is limited to those for which Sybase provides a Replication Agent to perform the translation to LTL for primary database operations.

Replication Server interfaces on both the primary and replicate sides are supported by the underlying Open Client/Open Server interface running on TDS.

• LTM Locator Updates
  The primary Replication Server maintains a “locator” value (LTM locator) that identifies the last point in a transaction log from which all data has been successfully received by the primary Replication Server.
• LTL Generation
  The number of bytes of information sent to Replication Server has a direct impact on the performance of the replication system; more data and commands received by Replication Server require more work and time to process.
• rs_ticket
  Some Replication Agents can start rs_ticket transactions.