An approach for providing efficient network data transfer service is provided. In one embodiment, a first database server receives, from a second database server, a first request to access a first storage subsystem. Here, the second database server cannot access first data in the first storage subsystem without another database server transmitting the first data to the second database server. In response, the first database server provides the second database server a first set of access primitives. Using the first set of access primitives, the second database server may access data stored in the first storage subsystem that may be otherwise not accessible. As a result, the first database server receives, from the second database server, a first data access request to access first data stored in the first storage subsystem.