Many Java ES component products require some degree of installation-time configuration. The extent of installation-time configuration you perform depends on which components you select and which installation option you choose.
The following configuration options are available in the installer:
Configure Later. During installation, you enter only the minimum values that are necessary for installing, then perform postinstallation configuration.
Configure Now. During installation, you configure component products that permit installation-time configuration. The information you specify might be just a few common parameters (common server settings), or it might include detailed component-specific parameters (component settings).
Common server settings are parameters that multiple components use. For example, most components require that you specify an administrative ID and password. By setting these common values, you are setting default values for all component administrative IDs and passwords. Component settings are parameters that apply to a particular component. These settings are requested during installation only if you have selected the Configure Now option. Some of these settings are populated from the common server settings.