The Upgrade Tool that is bundled with GlassFish Server 3.1 replicates the configuration of a previously installed server in the target installation. The Upgrade Tool assists in upgrading the configuration and applications from an earlier version of the Application Server or GlassFish Server to GlassFish Server 3.1.
In addition to Upgrade Tool, there are three Update Center tools that can be used to perform an in-place upgrade to GlassFish Server 3.1 from GlassFish Server 3.0.1 and Enterprise Server v3. These three Update Center tools are:
Software Update Notifier
The pkg command-line utility
Upgrade Tool and the three Update Center tools are explained later in this chapter.
To view a list of the older versions from which you can upgrade, see Supported Releases for Upgrade to GlassFish Server 3.1.
The following topics are addressed here: