Basic MQSeries Concepts Like other client-server systems, MQSeries consists of two major components: a server (called the “queue manager”) and a client. The queue manager consists of a number of processes that use shared memory to communicate with each other. It is responsible for storing messages either in memory or on the disk (in the case of persistent messages). A third component, the pub-lish/subscribe broker, is a separate application that uses the MQSeries API to forward pub-lish/subscribe messages. It must be installed and started separately if publish/subscribe is to be used.
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