Cluster

Description

This bean represents a cluster in the domain. Servers join a cluster by calling ServerMBean.setCluster with the logical name of the cluster. A configuration may define zero or more clusters. They may be looked up by logical name. The name of a cluster denotes its logical cluster name.

Syntax

<!ELEMENT Cluster ( Server* )* >

<!ATTLIST Cluster
   ClientCertProxyEnabled     (true | false)           "false"
   ClusterAddress             CDATA                    #IMPLIED
   DefaultLoadAlgorithm       (round-robin | 
                               weight-based | random)  "round-robin"
   MulticastAddress           CDATA                    "237.0.0.1"
   MulticastBufferSize        CDATA                    "64"
   MulticastPort              CDATA                    "7001"
   MulticastSendDelay         CDATA                    "12"
   MulticastTTL               CDATA                    "1"
   Name                       CDATA                    #REQUIRED
   Notes                      CDATA                    #IMPLIED
>

Parent Elements

The Cluster element is a child of the Domain element.

Attributes

Table 8-1 ClusterMBean Element Attributes

Attribute	Description	Range of Values and Default	Console Label
Client-Cert-Proxy-Enabled	Defines if the HttpClusterServlet proxies the client certificate in a special header. It's strongly suggested to use in conjunction with ConnectionFilters to make certain the WebLogic proxy machine is the only connection.	Default: false	Client Cert Proxy Enabled
Cluster-Address	Defines the address to be used by clients to connect to this cluster. This address may be either a DNS host name that maps to multiple IP addresses or a comma separated list of single address host names or IP addresses. If network channels are configured, it is possible to set the cluster address on a per channel basis.		Cluster Address
Default-Load-Algorithm	Defines the algorithm to be used for load-balancing between replicated services if none is specified for a particular service.	Default: "round-robin" Valid values: "round-robin" "weight-based" "random"	Default Load Algorithm
Multicast-Address	Defines the multicast address used by cluster members to communicate with each other.	Default: "237.0.0.1"	Multicast Address
Multicast-Buffer-Size	Defines the multicast socket send/receive buffer size.	Default: 64 Minimum: 64 Units: kilobytes	Multicast Buffer Size
Multicast-Port	Defines the multicast port used by cluster members to communicate with each other.	Default: 7001 Minimum: 1 Maximum: 65535	Multicast Port
Multicast-Send-Delay	Defines the number of milliseconds to delay sending message fragments over multicast in order to avoid OS-level buffer overflow.	Default: 12 Minimum: 0 Maximum: 100	Multicast Send Delay
Multicast-TTL	Defines the number of network hops that a cluster multicast message is allowed to travel. 1 restricts the cluster to one subnet.	Default: 1 Minimum: 1 Maximum: 255	Multicast TTL
Name	The name of this configuration. WebLogic Server uses an MBean to implement and persist the configuration.		Name
Notes	Optional information that you can include to describe this configuration.		Notes