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This chapter describes how the IMS shared queues environment exploits the System Logger to ensure the recoverability of the shared message queues in the event of a loss of the shared queue structures. Specific topics include:
Overview of the IMS shared queues environment, including the Common Queue Server (CQS) and the System Logger
How CQS uses the System Logger
How to define the System Logger in the IMSplex
CQS and System Logger operational considerations
CQS and System Logger error recovery considerations
CQS and System Logger performance considerations
Within this chapter, we will use the term "IMSplex" to refer to one or more IMS systems and associated address spaces running in a Parallel Sysplex with data sharing and shared queues. The term "shared queues group" refers to those IMS control regions which are sharing the message queues.
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