Weblogic Server Architecture topology

Weblogic Architecture

Weblogic Architecture perfectly matches with the map of any country.

                 The capital ( New Delhi )  -- Admin Server

                  The states   ( any state   )  -- “Managed Server”

        All the “Managed Servers” are managed by “Admin Server

Domain Architecture

Domain ( config.xml)

Process Communication in a LAN

How do processes communicate in a LAN ?

Each process in any OS ( Unix or Windows) listens on a port.

When another process wants to send a message to the first process it will use theIP:PORT ( called socket) to communicate.The same way each weblogic server process ( its just an other java process) will bind  to one IP:PORT and listens for requests.

This IP:PORT combination for any process is unique in the entire network. 

Important points about a Domain

“Admin server” or “Managed Server” is nothing but a JVM which can run any java program.

Admin & Managed servers are same in terms of capability.

They differ in terms of functionality.

                 Admin Server – Administers the Domain

                 Managed Servers – Usually hosts the application & servers the user requests.

Admin Server” & “Managed Servers” all have physical presence. They can be seen on the unix server as processes.

A Domain is just logical group of Admin Server & Managed server + Files related to them.

If a Domain has only one server, it is called Admin Server. In such case, application will be hosted on this admin server.