Recovery and restart

At any time during the operation of WebSphere MQ, there might be changes held in processor storage that have not yet been written to the page set. These changes are written out to the page set that is the least recently used by a background task within the queue manager.

If the queue manager terminates abnormally, the recovery phase of queue manager restart can recover the lost page set changes because persistent message data is held in log records. This means that WebSphere MQ can recover persistent message data and object changes right up to the point of failure.

If a queue manager that is a member of a queue-sharing group encounters a Coupling Facility failure, the persistent messages on that queue can be recovered only if you have backed up your Coupling Facility structure.

Recovery and restart are discussed in Recovery and restart.