(1) A set of key or RID pairs in a nonpartitioning index that is associated with a particular partition.
(2) One or more subsets of a single system that contains hardware resources and operates as an independent system. See also path group.
(3) In a partitioned database environment, a database partition server on a processor that has more than one database partition server assigned to it.
(4) A subset of the processor hardware that is defined to support an operating system.