IBM Mainframe Discussion List <[email protected]> wrote on 01/28/2007
05:25:12 PM:
> One of you system programmers recently uncovered what appears to be a
big
> hole in controlling SLIP dumps. So big a hole that I can hardly believe
it,
> and hope he is misinterpretting. I'd like confirmation or refutation,
please.
>
> We recently found a warning that specifying SDATA on the SLIP trap
overrides
> all system-wide CHGDUMP values. We've very purposefully set QUIESCE=NO
as
> our default, and there is (apparently) no way to specify this in the
SDATA
> of a SLIP. The fine System Commands manual says
>
> "SDATA options override the installation-defined defaults set by the
CHNGDUMP
> command for any parameters that can be specified."
>
> That "can be specified" is ambiguous. Can be specified via SLIP command
> responses, or can be spefied via CHGDUMP? Since Q=NO cannot be
specified
> in the SDATA parm in a response to the SLIP command, does SLIP take the
> value set in our defaults (Q=NO) or does it take IBM's default default
> (Q=YES)?
I think SLIP does not specify QUIESCE=YES on its SDUMPX macro. So a
SLIP dump will get the SDUMP/X default of QUIESCE=YES, unless
Q=NO was specified on CHNGDUMP.
I tried the following:
D D,O
IEE042I SYSTEM LOG DATA SET INITIALIZED
IEE857I 00.22.49 DUMP OPTION 747
SYSABEND- ADD PARMLIB OPTIONS SDATA=(LSQA,TRT,CB,ENQ,DM,IO,ERR,SUM),
PDATA=(SA,REGS,LPA,JPA,PSW,SPLS)
SYSUDUMP- ADD PARMLIB OPTIONS SDATA=(SUM), NO PDATA OPTIONS
SYSMDUMP- ADD PARMLIB OPTIONS (NUC,SQA,LSQA,SWA,TRT,RGN,LPA,CSA,SUM)
SDUMP- ADD OPTIONS (LSQA,TRT,WLM),BUFFERS=00000000K,
MAXSPACE=00000500M,MSGTIME=99999 MINUTES
ABDUMP- TIMEENQ=0240 SECONDS
SL SET,IF,A=SVCD,N=IEAVEDS0,ML=1,ID=SL1,SDATA=(NUC,SQA),E
In this dump, the system was quiesced.
Then,
CD SET,SDUMP=(LSQA,TRT),Q=NO,ADD
D D,O
IEE857I 00.33.05 DUMP OPTION 838
SYSABEND- ADD PARMLIB OPTIONS SDATA=(LSQA,TRT,CB,ENQ,DM,IO,ERR,SUM),
PDATA=(SA,REGS,LPA,JPA,PSW,SPLS)
SYSUDUMP- ADD PARMLIB OPTIONS SDATA=(SUM), NO PDATA OPTIONS
SYSMDUMP- ADD PARMLIB OPTIONS (NUC,SQA,LSQA,SWA,TRT,RGN,LPA,CSA,SUM)
SDUMP- ADD OPTIONS (LSQA,TRT,Q=NO,WLM),BUFFERS=00000000K,
MAXSPACE=00000500M,MSGTIME=99999 MINUTES
ABDUMP- TIMEENQ=0240 SECONDS
SL MOD,ID=SL1,EN
In this dump, the system was not quiesced.
If you are on z/OS 1.7 or higher, you can tell if the system
was quiesced for a particular dump using IPCS:
VERBX IEAVTSFS
System reset dispatchable 09/17/2042 23:53:47.370496
System was nondispatchable 00:00:00.000000
indicates that the system was quiesced. (And yes, IEAVTSFS
could check for a timestamp of zeroes and format something more
sensible than 09/19/2042).
System reset dispatchable 01/29/2007 00:25:24.261297
System was nondispatchable 00:00:00.444675
is an example where the system was quiesced.
Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY
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