HADB Nodes

A database node consists of a set of processes, a dedicated area of shared memory, and one or more secondary storage devices. It is used for storing and updating session data. Each node must have a mirror node, therefore nodes occur in pairs. In addition, to maximize availability, include two or more spare nodes, one in each DRU, so if a node fails a spare can take over while the node is repaired.

For an explanation of node topology alternatives, see the Sun Java System Application Server System Deployment Guide. For more general information about nodes and how to monitor them, see "Node Status".


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