Fusion Middleware Control Help for WebLogic Server

Cluster: Administration: Servers

Column Display     Configuration Options     

This page lists the server instances that are assigned to this cluster. You can use this page to add or remove server instances from the cluster.

Configuration Options

Name	Description
Server Template	The template used to configure this server. MBean Attribute: ServerMBean.ServerTemplate Changes take effect after you redeploy the module or restart the server.
Current Cluster Size	Get the current size of the dynamic cluster (the number of dynamic server instances allowed to be created). The specified number of server instances are dynamically created as ServerMBeans at runtime and associated ServerLifeCycleRuntimeMBeans are created. MBean Attribute: DynamicServersMBean.DynamicClusterSize Maximum value: 800
Maximum Cluster Size	Get the upper bound on the DynamicClusterSize that the Elasticity Framework is allowed to assign to DynamicClusterSize. MBean Attribute: DynamicServersMBean.MaxDynamicClusterSize Maximum value: 800
Minimum Cluster Size	Get the minimum number of running server instances that the Elasticity Framework will attempt to keep in the dynamic cluster. MBean Attribute: DynamicServersMBean.MinDynamicClusterSize Maximum value: 800
Server Name Prefix	The server name prefix is used to specify the naming convention when creating server names. When the server name prefix is defined, server names are calculated with the specified prefix followed by the index starting with the value specified by ServerNameStartingIndex() . MBean Attribute: DynamicServersMBean.ServerNamePrefix Changes take effect after you redeploy the module or restart the server.
Enable Calculated Listen Ports	Specifies whether listen ports are calculated. MBean Attribute: DynamicServersMBean.CalculatedListenPorts Changes take effect after you redeploy the module or restart the server.
Enable Calculated Machine Associations	The CalculatedMachineNames attribute controls how server instances in a dynamic cluster are assigned to a machine. If the attribute is not set, then the dynamic servers will not be assigned to a machine. If the attribute is set, then the MachineNameMatchExpression attribute is used to select the set of machines to use for the dynamic servers. MBean Attribute: DynamicServersMBean.CalculatedMachineNames Changes take effect after you redeploy the module or restart the server.
Machine Name Match Expression	The expression is used when determining machines to use for server assignments. If null, then all machines in the domain are used. If a expression is provided, then only the machines in the domain that match the expression will be used when assigning machine names to dynamic servers. The expression is a comma separated set of values that specify the machines to match. Each value will either match a machine name exactly or if specified with a trailing '*' suffix, the value will match multiple machine names. MBean Attribute: DynamicServersMBean.MachineNameMatchExpression Changes take effect after you redeploy the module or restart the server.

Column Display

Name	Description
Name	The alphanumeric name for this server instance. MBean Attribute: ServerMBean.Name Changes take effect after you redeploy the module or restart the server.
Type	The type of server (dynamic or explicitly configured).
Machine	The WebLogic Server host computer (machine) on which this server is meant to run. If you want to use Node Manager to start this server, you must assign the server to a machine and you must configure the machine for Node Manager. You cannot change this value if a server instance is already running. MBean Attribute: ServerMBean.Machine Changes take effect after you redeploy the module or restart the server.
Listen Port	The default TCP port that this server uses to listen for regular (non-SSL) incoming connections. Administrators must have the right privileges before binding to a port or else this operation will not be successful and it will render the console un-reachable. If this port is disabled, the SSL port must be enabled. Additional ports can be configured using network channels. The cluster (multicast) port is configured separately. MBean Attribute: ServerMBean.ListenPort Minimum value: 1 Maximum value: 65535
Listen Address	The IP address or DNS name this server uses to listen for incoming connections. For example, enter 12.34.5.67 or mymachine, respectively. Note that the value you specify for the listen address is not the URL to the host machine and it does not include the communication protocol, listen port, or channel. Servers can be reached through the following URL: protocol://listen-address:listen-port Any network channel that you configure for this server can override this listen address. If a server's listen address is undefined, clients can reach the server through an IP address of the computer that hosts the server, a DNS name that resolves to the host, or the localhost string. The localhost string can be used only for requests from clients that are running on the same computer as the server. If you want to limit the valid addresses for a server instance, specify one of the following: IP address. If you provide an IP address, clients can specify either the IP address or a DNS name that maps to the IP address. Clients that specify an IP address and attempt to connect through an SSL port must disable hostname verification. DNS name. If you provide a DNS name, clients can specify either the DNS name or the corresponding IP address. Do not leave the listen address undefined on a computer that uses multiple IP address (a multihomed computer). On such a computer, the server will bind to all available IP addresses. Note also that if you are using the demo certificates in a multi-server domain, Managed Server instances will fail to boot if you specify the fully-qualified DNS name. For information about this limitation and suggested workarounds, see "Limitation on CertGen Usage" in Administering Security for Oracle WebLogic Server. MBean Attribute: ServerMBean.ListenAddress Changes take effect after you redeploy the module or restart the server.