Before you begin
·
Install WebLogic Server on the computer on which you want to run the
server.
Note: The Administration Server and all Managed Servers in a domain must be
the same WebLogic Server version.
·
Create servers. A cluster always contains at least one server. You can
create additional servers.
A WebLogic Server cluster consists of multiple WebLogic
Server server instances running simultaneously and working together to provide
increased scalability and reliability. A cluster appears to clients to be a
single WebLogic Server instance. The server instances that constitute a cluster
can run on the same machine, or be located on different machines. You can
increase a cluster’s capacity by adding additional server instances to the
cluster on an existing machine, or you can add machines to the cluster to host
the incremental server instances. Each server instance in a cluster must run the
same version of WebLogic Server.
Create and
Configure a Cluster:
· Click New.
· Select the Messaging
Mode you wish to use for this cluster:
· When creating a
cluster within a new WebLogic Server environment, it is recommended that you
use the Unicast messaging type. Unicast requires less network configuration
than multicast.
· If you are creating a
cluster within an existing WebLogic Server environment or you need to ensure
backward compatibility with older versions of WebLogic Server, you must use the
Multicast messaging type. IP multicast is a simple broadcast technology that
enables multiple applications to subscribe to a given IP address and port number
and listen for messages.
· If you are using the
Unicast message mode, enter the Unicast Broadcast Channel. This channel is used
to transmit messages within the cluster. If you do not specify a channel, the
default channel is used.
· If you are using the Multicast
message mode:
§ Enter the Multicast
address of the new cluster.
A multicast address is an IP address in the range from 224.0.0.0 to
239.255.255.255. The valid range is from 224.0.0.0 to 239.255.255.255. The
default value used by WebLogic Server is 239.192.0.0. You should avoid using
multicast addresses in the range x.0.0.1. This address must be unique to this
cluster and should not be shared by other applications.
§ Enter the Multicast
Port for the new cluster.
The multicast port is used by cluster members to communicate with each
other. Valid values are between 1 and 65535.
· Click OK.
·
To activate these changes, in the Change Center of the Administration
Console, click Activate Changes.
Not all changes take effect immediately—some require a restart Result
Not all changes take effect immediately—some require a restart Result
The new cluster appears in the Summary of Clusters table.
Assign
Servers to Cluster:
Before you begin:
Create a cluster and
any Managed Servers you want to add to a cluster. To assign server instances to a
cluster:
·Select
the Select an existing server
and add it as a member of this cluster option.
·Select
a server from the drop-down list.
Note: You
cannot change the cluster of the Administration Server using the Administration
Console. You cannot change the cluster or machine of a running server.
·Click Finish.
·To
create a new server as part of a cluster:
·Select
the Create a new server and
add it to this cluster option.
·Click Next.
·Provide
the following information:
· Server
Name
· Server
Listen Address
· Server
Listen Port
·Click Finish.
The new server appears
in the list of servers and is added as a member of the current cluster.
·To
activate these changes, in the Change Center of the Administration Console,
click Activate Changes.
Not all changes take effect immediately—some require a restart
Not all changes take effect immediately—some require a restart
After
adding servers to Cluster, your console will be appear like this
