=====Overview=====
Oracle Golden Gate has two main architectures since 12.3.0.1:

  * Classic/Traditional
  * Microservices

Let's check them one by one. In the Classic Architecture we have the following structure:

{{ :classic_architecture.jpg?500 |}}

So, we have the GoldenGate which runs through a manager using pumps and so on. You know the drill.
Now with the new version we have the RESTful implementation:

{{ :microservices_architecture.jpg?500 |}}

As you will notice there are some traditional components of Oracle GoldenGate missing, while there are still extracts (capture), trail files, and replicats (apply). This is due to being a completely new replication architecture which had many benefits. A few of these benefits are:

Remote Administration
SSL Support
HTML 5 webpages for each service/server
Additional replication protocols (WSS, WS, UDT, OGG)
Real-time Performance Metrics

For more detail you can check [[https://www.dbasolved.com/2017/08/goldengate-classic-vs-microservices-architecture |here:]]
Furthermore, they have their limitations for example:

==Classical==
  * Traditional
    * Pros: Supports other databases: MySQL / DB2 / SQL Server
    * Cons: Doesn't support container databases
  * Integrated
    * Pros: Perfect for large data sets and supports Container databases
    * Cons: Only for Oracle database

==Microservices==
  * Traditional
    * Todo
  * Integrated
    * Todo


We have to start somewhere, so let's start with the installation of the Classic One:

=====Classical Configuration=====
For the configuration of the Classical Golden Gate, we will install the latest (at the moment) version: 12.3.0.1.4 and configure a simple one way replication between Oracle 12.2.0.1 -> Oracle 12.2.0.1


Let's get going :)

====Installation====
The packages can be downloaded from Oracle Edelivery cloud and uploaded, you are searching for: V975837-01 package.
In that ZIP file, there is one disk, so just upload it to the server and unzip it in a directory. Then you can start the installation via X-Terminal such as tigher-vncserver.

So let's go through the prompts:

{{ :goldengate_version_select.jpg?400 |}}

{{ :goldengate_install_location.jpg?400 |}}

{{ :goldengate_confirmation.jpg?400 |}}

{{ :goldengate_completion.jpg?400 |}}

Like that, the installation of the golden gate is done, please do the same on the other server (the passive server)