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Enterprise Server Concepts
The Enterprise Server consists of one or more domains. A domain is an administrative
boundary or context. Each domain has an administration server (also called Domain
Administration Server or DAS) associated with it and consists of zero or more standalone
instances and/or clusters. Each cluster has one or more homogeneous server instances. A server
instance is a single Java Virtual Machine (JVM) that runs the Application Server on a single
physical machine. Server instances (whether standalone or clustered) in a domain can run on
dierent physical hosts.
This section contains the following topics:
■
“Domain” on page 26
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“Domain Administration Server (DAS)” on page 26
■
“Usage Proles” on page 27
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“Cluster” on page 28
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“Node Agent” on page 28
■
“Server Instance” on page 29
Domain
A domain is a group of instances that are administered together. However, an application server
instance can belong to just one domain. In addition to the administration boundary, a domain
provides the basic security structure whereby dierent administrators can administer specic
groups (domains) of application server instances. By grouping the server instances into separate
domains, dierent organizations and administrators can share a single Enterprise Server
installation. Each domain has its own conguration, log les, and application deployment areas
that are independent of other domains. If the conguration is changed for one domain, the
congurations of other domains are not aected.
The Sun GlassFish Enterprise Server installer creates the default administrative domain (named
domain1). It also creates an associated domain administration server (named server). You
must provide the administration server port number. The default administration server port is
4848. The installer also queries for the administration username and master password. After
installation, additional administration domains can be created.
Domain Administration Server (DAS)
Each domain has its own Domain Administration Server (DAS) with a unique port number.
The Admin Console communicates with a specic DAS to administer the associated domain.
Each Admin Console session allows you to congure and manage the specic domain.
The Domain Administration Server (DAS), is a specially-designated application server instance
that hosts the administrative applications. The DAS authenticates the administrator, accepts
requests from administration tools, and communicates with server instances in the domain to
EnterpriseServerConcepts
SunGlassFishEnterpriseServer2.1AdministrationGuide • December200826