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Secondary host promotion z/OS DFSMShsm Implementation and Customization Guide SC23-6869-01 |
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DFSMShsm allows secondary hosts to take over functions for a failed primary host. This failure can be either an address space failure or an entire z/OS image failure. In addition, DFSMShsm allows another host to take over secondary space management (SSM) from a failed host, which can either be the primary or a secondary host. Secondary host promotion ensures continuous availability of DFSMShsm functions. Host promotion occurs without users who have to interact with other programs, receive or interpret console messages, or issue commands from batch jobs. The following definitions are key to understanding the concept
of secondary host promotion:
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