Node Manager

• Utility/process running on a physical server that enables you to start, stop, suspend, and restart WebLogic server instances remotely.
•  Server instances in a WebLogic Server and production environment are often distributed across multiple domains, machines and geographical locations. So if you want to control them remotely we need to use node manager.
• Although Node Manager is optional, it is recommended that if your WebLogic Server environment hosts applications with high-availability requirements.
•  Must run on each physical server that hosts WebLogic server instances that you want to control with the Node Manager
• Not associated with a domain. Can start any server instance that resides on the same physical server.
• Optional, but required to start/stop servers using the Administration console
• Required for Whole server Migration and for some configurations of Automatic service Migration.

Capabilities of Node Manager:
      Node Manager can be used to:

• Start, Shut down and Restart an Administration Server.
• Start, Shut down, Suspend and Restart and Managed Servers.
• Automatically Restart Administration and Managed Servers on failure.
• Monitor Servers and collects log data.

Node Manager Types:

     There are four types of Node Managers:

• SSL
• PLAIN
• SSH
• RSH

Node Manager Versions:

Java Based Node Manager	Script Based Node Manager
It is used in Windows, UNIX and Linux Operating Systems.	It is used only in UNIX/Linux Operating Systems and not supported in Windows OS
It is more secured.	It is less secured when compare to Java Based Node Manager.
Examples: PLAIN SSL	Examples: SSH RSH

How to start a Node Manager:

 Navigate to the Following location:
                   WEBLOGIC_HOME\server\bin

Clicking on the startNodeManager script will launch the node manager