Program guide > (deprecated) Partitioning facility


Deprecated feature: The partitioning facility (WPF) feature is deprecated. You can configure partitioning with WebSphere eXtreme Scale.


Partitions

A partition is a uniquely addressable endpoint within the cluster. A partition is not a server, or a Java™ Virtual Machine (JVM). A partition has a life cycle, and is managed by the high availability (HA) manager. A partition is created dynamically at startup during Java 2 Platform Enterprise Edition (J2EE) application initialization and then available for client applications to use as a target end point when in the active state.

To become active, the HA manager moves the partition from an idle state to an active state through a management transition. The state transitions can result from JMX management commands or system events such as an application server starting or stopping. The wpfadmin command provides the administrator a list of active partitions.

A partition can be activated on any cluster member in the cluster. The HA manager guarantees there is a single instance of an active partition in the cluster at a given time within the cluster for Cluster scoped partitions (there is another type called Node Scoped, discussed later in this document). Using the HA manager, a partition can be moved from one member in the cluster to another through a wpfadmin command. When moving a partition, the partition changes states on each cluster member. For example, it can be deactivated on the original cluster member, and it can be activated on the new target cluster member.

As an option, a partition can be associated with a partition alias. A partition alias provides more flexible context-based routing for a partition. It also provides the mechanism to group a subset of partitions with the same partition alias name, so that it can be workload managed in a group of partitions.


Parent topic:

(deprecated) Partitioning facility


Related concepts

Partitioning introduction

Partition life cycle