Java Reference
In-Depth Information
put/output streams. Since Process Controller is not configurable, we will not discuss it any
further.
The following diagram depicts a typical domain deployment configuration:
As you can see in the preceding diagram, one host (
Host1
) acts as a dedicated domain
controller. This is a common practice adopted in domain-managed servers in order to lo-
gically and physically separate the administration unit from the servers where the applica-
tions are hosted.
The other hosts (
Host2
and
Host3
) contain the domain application servers, which are di-
vided into two server groups:
main-server-group
and
other-server-group
. A server
group is a logical set of server instances that will be managed and configured together.
Each server group can, in turn, be configured with different profiles and deployments; for
example, in the preceding domain, you can provide some services with
main-server-
group
and other services with
other-server-group
.
This has some advantages. For example, when you don't want to shut down your applica-
tion for a new version, you can start by redeploying only one server group at a time. When
one server is not fully operational, requests can be handled by the second one.
Getting into the details of the domain configuration is beyond the scope of this topic;
however, by the end of this chapter, we will see how to deploy application units in a do-
main using the command-line interface available in WildFly.
