IBM WebSphere V5.0 Security - CGISecurity

Deployment
Manager
Cell-wide
configuration
repository
Publish/Activate
Cell cfg.
Process A cfg.
Publish/Activate
Cell cfg.
Node Agent
Process
A
Node Agent
Node cfg.
Process A cfg.
Process B cfg.
Node cfg.
Process B cfg.
Process
B
(App Server)
(App Server)
Process
A
(JMS Server)
Process
B
(App Server)
Node A
Commands
Configuration
Node B
Figure 9-2 Overview of WebSphere Network Deployment configuration
Follow the description of the elements on the diagram above:
► Node is a logical grouping of application server processes. A node often
corresponds to a physical server machine with an IP address assigned to it.
The application server processes located on one node are managed by a
single node agent. On each node, there is local copy of the cell configuration
repository managed by a node agent. This repository may be modified
through deployment manager during publish/activate configuration
processes. The node agent also has access to the configuration repository of
each process running on a node.
► Cell is logical configuration concept that associates WebSphere server nodes
with one another. Administrators may freely define the cell according to
whatever criteria they will take to group the servers (organizational aspects,
application aspects, and so on). A cell is managed by one deployment
manager process.
► Node Agent is the administrative process that manages application server
processes on a single node. The Node Agent routes administrative requests
issued from the deployment manager to a particular application server. It is
218 IBM WebSphere V5.0 Security Handbook