Fellow IBMers and Mark. Zelden in particular,
I am modifying an assembler program and I have a need to have a single
digit unique identifier for a system within a SYSPLEX. I started by
looking at Mark Zelden's IPLINFO (thanks again Mark...this has been a
huge boon to me REXX skill set as I reference your techniques
frequently). I looked at the following fields (field names from
IPLINFO):
LPAR_# From PCCA + 7
CSDPLPN From CSD + 252
JESDSNID From JESPEXT + 100 - Recognizing this is actually a 2 digit
field
The program I am modifying is being used in z/OS 1.8 - z/OS 1.10 in both
JES2 and JES3 and in VM guests. The VM Guests ruled out CSDPLPN and
LPAR_# as it always came back as 0 on guests. JESDSNID seems to fit the
bill especially with the description from the IPLINFO utility:
'This was system number' Format(JESDSNID) 'added to the sysplex.'
My question is whether or not this field really represents the sequence
a system was added in to the SYSPLEX. From the Data Areas manuals I see
this description:
JESDSNID ID for temporary data
sets on this system.
I did a test on 3 systems to check out this field. All three systems
are in the same SYSPLEX but one is in its own JES MAS. The numbers came
back all unique (1,2,3) so I am encouraged.
Any commentary or suggestions about my quandary are as always greatly
appreciated.
Sean
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