Most interesting features from my point of view:
- Support for up to 54 engines in a single image.
The total number of processors defined in a z/OS logical partition is the sum of
general-purpose processors (CPs), System z9 Application Assist Processors (zAAPs), and
System z9 Integrated Information Processors (zIIPs). - System REXX facility (execution of REXX routines in an authorized environment)
- ISPF support for editing and browsing z/OS UNIX and ASCII files
- RMF provides information about the CF processor resources consumed by each Coupling
Facility structure. This requires CFCC Level 15,
which is available on System z9 servers.
Also available at z/OS 1.6 and above via PTF's for APAR OA17055 (XES) and APAR OA17070 (RMF). Enablement of the CF Duplexing Enhancements function of CFLEVEL 15 is not provided by these APAR, but will be provided by a future APAR (OA21913). - Support for placing CF's into a new state, called "maintenance mode."
In conjunction with the REALLOCATE command, the new maintenance mode support can
greatly simplify operational procedures related to taking a CF down for maintenance or
upgrade. - SMF can be configured to use System Logger to write data to one or more log streams
- The maximum specifiable size of the MVS System Trace is increased from the
current value of 999K per CPU. - WLM's sysplex routing services are enhanced to recognize the zAAP and the zIIP capacity of a System z server.
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