Oracle Database - Gateway Architecture

About

The Heterogeneous Services component (gateway) in the database communicates with the Heterogeneous Services agent process. The agent process, in turn, communicates with the remote database.

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The code can be conceptually divided into three parts:

  • The Heterogeneous Services component in Oracle Database : This module performs most of the processing related to heterogeneous connectivity.
  • Agent generic code : This is code in the agent that is generic to all Heterogeneous Services products. This code communicates with the database and provides multithreading support.
  • The driver : This module communicates with the non-Oracle system. It is used to map calls from the Heterogeneous Services to the native API of the non-Oracle system, and it is not specific to Oracle systems.

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