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JES3 to JES2 Migration Considerations by Tom Wasik, John Unterholzner, John A. O'Leary, Brad Habbershaw, Bruce Dennis, Karan Singh, Frank Kyne

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Availability considerations
This chapter describes the considerations of availability in each of the JES environments and compares how each of them are maintained.
17.1 Standard practices for availability
It is assumed that for either JES configuration, IBM standard practices are followed with regards to availability. All configurations must maintain redundant processes that are documented and known to operations support staff. For example, neither JES configuration should require an all-systems sysplex IPL for normal routine maintenance. The ...

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