Use this page to manage the members of a cluster. A cluster of application servers are managed together and participate in workload management.
To view this administrative console page, click Servers > Clusters > cluster_name > Cluster members > cluster_member_name.
Specifies the name of the server in the cluster. On most platforms, the name of the server is the process name. The name must match the (object) name of the application server.
Data type | String |
Controls the number of requests that are directed to the application server. Even though you specify a value of 0 to 20 as the weight of a server, the weight that is given to the server as a member of a cluster is a proportion that is based on the weight assigned to the server (the numerator) and the sum of the weights of all members of the cluster (the denominator).
When you add a new member to a cluster, the number of requests that are sent to each server in the cluster decreases, assuming the number of requests coming into the cluster stays the same. Similarly when you remove a new member from a cluster, the number of requests that are sent to each server in the cluster increases, assuming the number of requests coming into the cluster stays the same.
For example, if you have a cluster that consists of members A, B, and C with weights 2, 3, and 4, respectively, 2/9 of the requests are assigned to member A, 3/9 are assigned to member B, and 4/9 are assigned to member C. If a new member, member D, is added to the cluster and member D has a weight of 5, member A now gets 2/14 of the requests, member B gets 3/14 of the requests, member C gets 4/14 of the requests, and member D gets 5/14 of the requests.
Data type | Integer |
Range | 0 to 20 |
Specifies a numerical identifier for the application server that is unique within the cluster. The ID is used for affinity.
Data type | Integer |
Data type | Hexadecimal |
Specifies the short name for this cluster member. This field only applies to the z/OS platform.
The short name is the default z/OS job name and identifies the cluster member to the native facilities of the operating system, such as Workload Manager (WLM), Automatic Restart Manager, SAF (for example, RACF), started task control, and others.
If you do not specify a short name, the system assigns a default short name that is automatically unique within the cell. You can change the generated short name to conform with your naming conventions.
Data type | String |
Enabling this option may reduce the startup time of an application server. This may include JVM settings such as disabling bytecode verification and reducing JIT compilation costs. Do not enable this setting on production servers.
Specifies that you want to use the JVM settings -Xverify and -Xquickstart on startup. After selecting this option, save the configuration and restart the server to activate development mode.
The default setting for this option is false, which indicates that the server will not be started in development mode. Setting this option to true specifies that the server will be started in development mode (with settings that will speed server startup time).
Data type | Boolean |
Default | false |
Specifies whether to start the server on multiple threads. Starting the server on multiple threads might shorten the startup time.
Specifies that you want the server components, services, and applications to start in parallel rather than sequentially.
The default setting for this option is true, which indicates that the server be started using multiple threads. Setting this option to false specifies that the server will not be started in using multiple threads (which may lengthen startup time).
The order in which applications start depends on the weight you assign to each application. The application with the lowest starting weight starts first. Applications with the same starting weight start in parallel. You use the Starting weight field on the Applications > Enterprise Applications > application_name page of the administrative console to set the starting weight for an application.
Data type | Boolean |
Default | true |
Specifies whether there is a single class loader to load all applications or a different class loader for each application.
Specifies whether the class loader should search in the parent class loader or in the application class loader first to load a class. The standard for Developer Kit class loaders and WebSphere Application Server class loaders is Parent first.
This field only applies if you set the Class loader policy field to single.
If you select Parent last, your application can override classes contained in the parent class loader, but this action can potentially result in ClassCastException or linkage errors if you have mixed use of overridden classes and non-overridden classes.
Specifies the name of the server in the cluster. On most platforms, the name of the server is the process name. The name must match the (object) name of the application server.
Data type | String |
Controls the number of requests that are directed to the application server. Even though you specify a value of 0 to 20 as the weight of a server, the weight that is given to the server as a member of a cluster is a proportion that is based on the weight assigned to the server (the numerator) and the sum of the weights of all members of the cluster (the denominator).
When you add a new member to a cluster, the number of requests that are sent to each server in the cluster decreases, assuming the number of requests coming into the cluster stays the same. Similarly when you remove a new member from a cluster, the number of requests that are sent to each server in the cluster increases, assuming the number of requests coming into the cluster stays the same.
For example, if you have a cluster that consists of members A, B, and C with weights 2, 3, and 4, respectively, 2/9 of the requests are assigned to member A, 3/9 are assigned to member B, and 4/9 are assigned to member C. If a new member, member D, is added to the cluster and member D has a weight of 5, member A now gets 2/14 of the requests, member B gets 3/14 of the requests, member C gets 4/14 of the requests, and member D gets 5/14 of the requests.
Data type | Integer |
Range | 0 to 20 |
Specifies the native operating system process ID for this server.
The process ID property is read only. The system automatically generates the value.
Specifies the name of the cell in which this server is running.
The Cell name property is read only.
Specifies the name of the node in which this server is running.
The Node name property is read only.
Specifies the run-time execution state for this server.
The State property is read only.