A WebLogic Server cluster is a group of servers that work together to provide a more scalable, more reliable application platform than a single server.

Use this page to specify a server's primary and secondary replication group, cluster weight, and the interface address used to handle multicast traffic.

Attribute Label	Description	Value Constraints
Replication Group	Defines preferred clustered instances considered for hosting replicas of the primary HTTP session states created on the server. MBean: weblogic.management. configuration.ServerMBean Attribute: ReplicationGroup	Configurable: yes Readable: yes Writable: yes
Preferred Secondary Group	Defines secondary clustered instances considered for hosting replicas of the primary HTTP session states created on the server. MBean: weblogic.management. configuration.ServerMBean Attribute: PreferredSecondaryGroup	Configurable: yes Readable: yes Writable: yes
Cluster Weight	Defines a value used specify the proportion of the load the server will bear relative to other servers in a cluster. If all servers have the default weight (100) or the same weight, each bears an equal proportion of the load. If one server has weight 50 and all other servers have weight 100, the 50-weight server will bear half as much load as any other server. MBean: weblogic.management. configuration.ServerMBean Attribute: ClusterWeight	Minimum: 1 Maximum: 100 Default: 100 Configurable: yes Readable: yes Writable: yes
Interface Address	Defines the interface address used to specify the NIC that handles cluster multicast traffic. MBean: weblogic.management. configuration.ServerMBean Attribute: InterfaceAddress	Configurable: yes Readable: yes Writable: yes

Attribute Label

Description

Value Constraints

Replication Group

Defines preferred clustered instances considered for hosting replicas of the primary HTTP session states created on the server.

MBean: weblogic.management.
configuration.ServerMBean

Attribute: ReplicationGroup

Configurable: yes

Readable: yes

Writable: yes

Preferred Secondary Group

Defines secondary clustered instances considered for hosting replicas of the primary HTTP session states created on the server.

MBean: weblogic.management.
configuration.ServerMBean

Attribute: PreferredSecondaryGroup

Configurable: yes

Readable: yes

Writable: yes

Cluster Weight

Defines a value used specify the proportion of the load the server will bear relative to other servers in a cluster.

If all servers have the default weight (100) or the same weight, each bears an equal proportion of the load. If one server has weight 50 and all other servers have weight 100, the 50-weight server will bear half as much load as any other server.

MBean: weblogic.management.
configuration.ServerMBean

Attribute: ClusterWeight

Minimum: 1

Maximum: 100

Default: 100

Configurable: yes

Readable: yes

Writable: yes

Interface Address

Defines the interface address used to specify the NIC that handles cluster multicast traffic.

MBean: weblogic.management.
configuration.ServerMBean

Attribute: InterfaceAddress

Configurable: yes

Readable: yes

Writable: yes