On Sun, 8 Jan 2012 06:53:12 -0600, Mauri Kanter <itzuv...@013.net.il> wrote:

>Just one more addition ...
>
>Maintenance was applied to CFs <snip>
>

The only problem my client ran into with zEnterprise was the new CF level
foot print.   2 different sandbox plexes each had 2 CFs (one internal and
one external) with 512M of storage, which was always enough in the past. 
The CF level 16 CFCC took about 90M and CF level 17 took over 400M. 

I couldn't find this documented anywhere nor was it mentioned in any
of the reviews we had with IBM prior to the upgrades from z10s.  We
just bumped up the storage to 750G in each CF LPAR and that was enough
because the structures used took less than 150G.

When we finally got confirmation that this was expected, this was the
detail behind the growth:

 "the growth of the image is do to many enhancements in function and recovery 
in the CFCC 17 code. CFCC 17 on z196 has added some function and added enhanced 
recovery of the CF code. The number of supported structures was increased from 
1023 to 2047 structures, the number of logical connection to a structure was 
increased, and the recovery was enhanced to improve nondisruptive MCL 
activation to maintain code levels and the ability to take nondisruptive CF 
dumps. CFCC recovery code has been added to take nondisruptive dumps of the CF 
and signal all connected images with a CRW machine check to invoke sysplex wide 
SVC and nondisruptive CF dumps for some CF recovery events to gather problem 
data."

--
Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS       
mailto:m...@mzelden.com                                        
Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html 
Systems Programming expert at http://expertanswercenter.techtarget.com/

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