A node group is a collection of managed nodes. Managed nodes are WebSphere Application Server nodes. A node group defines a boundary for server cluster formation.
Nodes that you organize into a node group should be enough alike in terms of installed software, available resources, and configuration to enable servers on those nodes to host the same applications as part of a server cluster. The deployment manager does no validation to guarantee that nodes in a given node group have anything in common.
Node groups are optional and are established at the discretion of the WAS administrator. However, a node must be a member of a node group. Initially, all Application Server nodes are members of the default node group named DefaultNodeGroup.
A node can be a member of more than one node group.
On the z/OS platform, an Application Server node must be a member of a sysplex node group. Nodes in the same sysplex must be in the same sysplex node group. A node can be in one sysplex node group only.
A node on a distributed platform and a node on a z/OS platform cannot be members of the same node group.
To delete a node group, the node group must be empty. The default node group cannot be deleted.
Node group membership rules
Examples: Using node groups
Manage node groups
WebSphere is a trademark of the IBM Corporation in the United States, other countries, or both.
IBM is a trademark of the IBM Corporation in the United States, other countries, or both.