WebSphere MQ Resources

WebSphere MQ Recovery Kit OverviewWebSphere MQ Recovery Kit OverviewWebSphere MQ (formerly known as MQSeries) is an IBM software product that provides reliableand guaranteed one time only delivery of messages. The core element of WebSphere MQ is thequeue manager which handles a number of queues that are used to put messages into and receivemessages from. Once a message is put into a queue, it is guaranteed that this message is persistentand will be delivered only once.The WebSphere MQ Recovery Kit enables LifeKeeper to protect WebSphere MQ queuemanagers including the command server, the listener and the persistent queue manager data.Protection of the queue manager listener can be optionally disabled on a per queue manager basisto support configurations that do not handle client connects or to enable the administrator to shutdown the listener without causing LifeKeeper recovery.The WebSphere MQ Recovery Kit provides a mechanism to recover protected WebSphere MQqueue managers from a failed primary server onto a backup server. LifeKeeper can detect failureseither at the server level (via a heartbeat) or resource level (by monitoring the WebSphere MQdaemons) so that control of the protected WebSphere MQ services are transferred to a backupserver.WebSphere MQ Resource HierarchiesA typical WebSphere MQ hierarchy will be comprised of a WebSphere MQ queue managerresource. It also contains one or more file system resources, depending on the file system layoutand zero or more IP resources. The exact makeup of the hierarchy depends on what is beingprotected. If the administrator chooses to include an IP resource in the WebSphere MQ resourcehierarchy, that IP must be created prior to creating the WebSphere MQ queue manager resourceand that IP resource must be active on the primary server. The file system hierarchies are createdautomatically during the creation of the WebSphere MQ queue manager resource.8 WebSphere MQ Recovery Kit Administration Guide