WebSphere WebSphere Application Server Network Deployment, Version 6.1.x Operating Systems: AIX, HP-UX, i5/OS, Linux, Solaris, Windows, z/OS

Message stores

Message stores play an essential part in the operation of messaging engines. Each messaging engine has one and only one message store, which can be either a file store or a data store.

About this task

A message store enables a messaging engine to preserve operating information and to retain those objects that messaging engines need for recovery in the event of a failure.

A messaging engine preserves both volatile and durable data in its message store. Volatile data is lost when a messaging engine stops, in either a controlled or an uncontrolled manner. Durable data is available after the server restarts. For more information, refer to Message reliability levels. A messaging engine stores various types of data, including messages, transaction states, and communication channel states.

When started, a messaging engine obtains configuration information from the WebSphere Common Configuration Model (WCCM) repository. A messaging engine retrieves all other data from its own file store or data store.

Important: There are currently no facilities available for migrating from a data store to a file store.

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Timestamp icon Last updated: 26 February 2009
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