7.3 High availability on logical partitions
A System p logical partition (LPAR) is a natural home for a WebSphere node. A single physical server can host many nodes, with the added advantage that each node is a separate installation of the operating system and is isolated from the others. If your requirements include running separate applications on the same WebSphere environment, then running them in separate LPARs provides a far greater level of isolation. The following sections discuss the concepts of isolation, ease of use, and redundancy in relation to the use of LPARs.