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## instance

an instance in GlassFish Server has its own Java EE configuration, Java EE resources, application deployment areas, and server configuration settings

Description

GlassFish Server creates one server instance, called `server` at the time of installation. You can delete the server instance and create a new instance with a different name.

For many users, one server instance meets their needs. However, depending upon your environment, you might want to create additional server instances. For example, in a development environment you can use different server instances to test different GlassFish Server configurations, or to compare and test different application deployments. Because you can easily add or delete a server instance, you can use them to create temporary "sandbox" areas to experiment with while developing.