Sun Java System Application Server Platform Edition 8.1 2005Q2 Update 2 Administration Guide

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# Application Server Configuration

- Configuring the Application Server

- Restarting the Server or Domain

## Configuring the Application Server

Application Server domains are logical or physical units created to help the administrator manage a system configuration. A domain is broken down into smaller units including instances and node agents. A server instance is a single Java Virtual Machine (JVM) that runs the Application Server on a single physical machine. Each domain has one or more instances. A domain must also have at least one associated node agent for the instance to function properly. Domains can be grouped together to create a cluster. Clusters allow the administrator to manage groups of hardware and software.

## Creating a Domain

Domains are created using the `create-domain` command. The following example command creates a domain named `mydomain`. The administration server listens on port 1234 and the administrative user name is `hanan`. The command prompts for the administrative and master passwords.

    $ asadmin create-domain --adminport 80 --adminuser hanan mydomain

To start the Admin Console for `mydomain` domain, in a browser, enter the following URL:

    http://hostname:80

For the preceding `create-domain` example, the domain’s log files, configuration files, and deployed applications now reside in the following directory:

domain-root-dir`/mydomain`

To create the domain’s directory in another location, specify the `--domaindir` option. For the full syntax of the command, type `asadmin help create-domain`.

## Deleting a Domain

Domains are deleted using the `asadmin delete-domain` command. Only the operating system user (or root) who can administer the domain can execute this command successfully. To delete a domain named `mydomain`, for example, type the following command:

    $ asadmin delete-domain mydomain

## Listing Domains

The domains created on a machine can be found using the `asadmin list-domains` command. To list the domains in the default domain-root-dir directory, type this command:

    $ asadmin list-domains

To list domains that were created in other directories, specify the `--domaindir` option.

## Restarting the Server or Domain

Restarting the server is the same as restarting the domain. To restart the domain or server, stop and start the domain.

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