Network Deployment (Distributed operating systems), v8.0 > Secure applications and their environment > Authenticate users > Select an authentication mechanism > Configure LTPA and working with keys > 2. Generate keys manually or automatically, and control the number of active keys.
Work with nodes - groups of managed servers
A node is a grouping of managed or unmanaged servers. We can add both managed and unmanaged nodes to your product topology. If you add a new node for an existing WebSphere application server to the network deployment cell, you add a managed node. If you create a node in the topology for managing web servers or servers other than WebSphere application servers, you add an unmanaged node. We can add, configure, remove, and otherwise work with nodes, node agents, and node groups.
- Managed and unmanaged nodes
A node is a logical grouping of managed servers.
- Node groups
A node group is a collection of managed nodes. Managed nodes are WAS nodes. A node group defines a boundary for server cluster formation.
- Example: Using node groups with clusters
Use node groups to define groups of nodes that are capable of hosting members of the same cluster. An application that is deployed to a cluster must be capable of running on any of the cluster members. The node that hosts each of the cluster members must be configured with software and settings that are necessary to support the application.
- Manage nodes
We can add a node, select the discovery protocol for a node, define a custom property for a node, stop servers on a node, and remove a node.
- Change the node host names
After creating a profile or adding a node, the host name of the server or its ports might be incorrect. We can follow the examples to change the server host name using command line tools and the wsadmin scripting tool, and the host name of the server ports using the admin console and command line tools.
- Start and stop a node
We can start a node by using the startNode command. We can stop a node by using the stopNode command. Starting and stopping a node is applicable only if your profile, also known as a node, is added to a WAS WAS ND domain or cell.
- Configure node groups
This task discusses how to create and manage node groups.
- Add node group members
Use this topic to manage the nodes in your node groups by viewing, adding or deleting the nodes in a node group.
- Manage node agents
Node agents are admin agents that represent a node to your system and manage the servers on that node. Node agents monitor application servers on a host system and route administrative requests to servers.
- Configure remote file services
Configuration data for the WAS product resides in files. Two services help you reconfigure and otherwise manage these files: the file transfer service and file synchronization service.