ExpressConnect for Oracle (ECO) is an embedded library loaded by Replication Server® for Oracle replication.
ECO provides direct communication between Replication Server and a replicate Oracle data server, making Oracle data easily accessible in a heterogeneous replication environment. It also eliminates the need for installing and setting up a separate gateway server, thereby improving performance and reducing the complexities of managing a replication system.
Minimizes network overhead between products
Reduces SQL parsing and datatype conversions
Takes greater advantage of “bind variable” SQL statements where it is possible to make Oracle data server processing more efficient
Uses array processing to the Oracle data server
You can use ECO if you have a licensed Replication Server and have purchased Replication Server Option for Oracle.