Next Steps In this section you started the Domain Administration Server and confirmed that it is running. You also logged in to the Admin Console and used the Log Viewer. You can stop the Quick Start trail here if you do not wish to continue, or you can go on to the next section.
Creating a Cluster
This section, the second of three basic topics, explains how to create a cluster that contains two Application Server instances. For simplicity, the cluster runs completely within one machine. This topic includes the following tasks:
■“To Start the Node Agent” on page 12
■“To Create a Cluster” on page 12
▼To Start the Node Agent
A node agent is a lightweight process running on each machine that participates in an Application Server administrative domain. The node agent is responsible for starting and stopping server instances on the host. It also collaborates with the Domain Administration Server to create new Application Server instances.
One node agent is needed on a machine, for each Application Server administrative domain that the machine belongs to. If you chose the Node Agent Component during installation, a default node agent called hostname was created.
Steps 1. In a terminal window, type this command:
asadmin
Replace the variable hostname with the name of the host where the Application Server is running.
2.When you are prompted, provide the master password.
The node agent starts and connects with the Domain Administration Server.
Note – If the Domain Administration Server is not running, the node agent might fail to start.
▼To Create a Cluster
A cluster is a group of server instances (typically on multiple hosts) that share the same configurations, resources, and applications. A cluster facilitates load balancing across server instances and high availability through failover. You can create clusters
12Sun Java System Application Server Enterprise Edition 8.1 2005Q2 Quick Start Guide
