Level 15 Coupling Facility; Level 14 Coupling Facility; Level 13 Coupling Facility; Level 12 Coupling Facility - IBM Z9 Planning Manual

Level 15 Coupling Facility

A level 15 coupling facility (CFLEVEL=15) provides the following enhancement:
v Support for 112 tasks in the CF
v Storage increment size change to 512K
Note: Considerations for structure re-sizing should be taken into account when
CPC Support: See Table 2-8 on page 2-51 for a listing of the CPCs that support a
level 15 coupling facility.

Level 14 Coupling Facility

A level 14 coupling facility (CFLEVEL=14) provides the following enhancement:
v CFCC Dispatcher Enhancements
CPC Support: See Table 2-8 on page 2-51 for a listing of the CPCs that support a
level 14 coupling facility.

Level 13 Coupling Facility

A level 13 coupling facility (CFLEVEL=13) provides the following enhancement:
v Performance enhancements for Castout
CPC Support: See Table 2-8 on page 2-51 for a listing of the CPCs that support a
level 13 coupling facility.
Software Corequisites: For a list of the software levels that exploit the function
and levels that can coexist with CFLEVEL=13, see the "Summary of CFLEVEL
Functions" section of the z/OS MVS Setting Up a Sysplex document.

Level 12 Coupling Facility

Enhancements: A level 12 coupling facility (CFLEVEL=12) provides the following
enhancements:
v 64-bit CFCC support; removal of the 2 GB control store limit, and removal of the
v 48 concurrent tasks
v Support for Message Timing Ordering providing enhanced scalability of parallel
v System-Managed Coupling Facility (CF) Duplexing
v Cache structure architecture extensions for Batch Write, Castout, and
v Support for > 15 LPs
v Support for MCSS
CPC Support: See Table 2-8 on page 2-51 for a listing of the CPCs that support a
level 12 coupling facility.
2-52
PR/SM Planning Guide
CFLEVEL but rather the recommended service level. For the latest EC and MCL
information, use IBM Service Link to view the appropriate PSP bucket subset ID
for hardware and software maintenance information. The most current CPC
Support for CFCC table can be found online at http://www1.s390.ibm.com/
products/pso/cftable.html.
moving to a CFLevel 15 Coupling Facility. It is highly recomended to use the
CFSIZER tool for this.
distinction between control and non-control store
sysplex.
Cross-Invalidate functions