Some sandbox testing shows that IEFSSN00 *seems to be* starting all
subsystems that:
1) Contain the INITRTN() verb, and,
2) Have a proc in SYS1.PROCLIB with the same name as the SUBNAME() verb.
So, on the system containing the IEFSSN00 shown below, SMS, JES2, RACF
and IXFP are started. DFRM is not started because our RMM proc in
SYS1.PROCLIB has a different name.
Of course, this could all be just a coincidence and I am still missing
something. :-)
Tony Thigpen
Mark Zelden wrote on 5/21/19 4:31 PM:
On Tue, 21 May 2019 10:27:20 -0400, Tony Thigpen <[email protected]> wrote:
I am looking at my ipl process and am trying to understand why some of
the start by themselves.
I am in a sandbox so I can play all I want.
My current IEFSSN00 is:
000001 SUBSYS SUBNAME(SMS)
000002 INITRTN(IGDSSIIN)
000003 INITPARM('ID=00,PROMPT=DISPLAY')
000004 SUBSYS SUBNAME(JES2) /* JES2 AS PRIMARY SUBSYSTEM */
000005 PRIMARY(YES) START(YES)
000006 SUBSYS SUBNAME(RACF)
000007 INITRTN(IRRSSI00)
000008 INITPARM('%,M')
000009 SUBSYS SUBNAME(CICS)
000010 SUBSYS SUBNAME(DFRM) /* NAME OF THE DFSMSRMM SUBSYSTEM */
000011 INITRTN(EDGSSSI)
000012 SUBSYS SUBNAME(TNF)
000013 SUBSYS SUBNAME(VMCF)
000014 SUBSYS SUBNAME(FFST)
000015 SUBSYS SUBNAME(IXFP) /* IXFP SUBSYSTEM */
000016 INITRTN(SIBSSIPL)
000017 INITPARM('INIT(Y),DYNDDSR(I),LANG(AMENG)')
I understand that JES will start because of the START(YES), but I am
also seeing other sub-systems like RACF start.
Does the INITRTN force an autostart as if START(YES) was specified?
No, but it can start a subsystem address space.
It appears that jobs started with IEFSSNxx start as normal JES jobs. Can
IEFSSNxx be used to start tasks which run as SUB=MSTR.
Only 2 ways a subsystem ASID can start as far as I know, as an STC from
a START command or from the INITRTN (using ASCRE I assume).
z/OS MVS Using the Subsystem Interface should have the details.
https://www.ibm.com/servers/resourcelink/svc00100.nsf/pages/zOSV2R3SA380679/$file/ieaf200_v2r3.pdf
Best Regards,
Mark
--
Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS
ITIL v3 Foundation Certified
mailto:[email protected]
Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html
Systems Programming expert at http://search390.techtarget.com/ateExperts/
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