Depending on what you regard as "impact", I think the answer is
MAYBE. The surviving will hang waiting for the other system to come
back up. If this takes 10 minutes, the surviving system will be hung
(waiting) for these 10 minutes. Doing the V Offline, tells the system
to not wait for the other system and it will resync once the other
system finishes Re-IPL'ing. Your IMS/CICS/DB2 subsystems will be
hung/unresponsive for the 10 minutes so the V OFFLINE is a better
idea (it is the same as the other system doing an orderly shutdown
and thus withdrawing from the sysplex).
At 14:55 +0000 on 01/19/2014, Staller, Allan wrote about Re: Impact
of XCF offline:
I do not believe there will be any impact the z/OS level.
IMS/CICS/DB2 may have different requirements
The surviving system will issue messages a "wait" until it sees the
failing system attempting to rejoin the sysplex.
The failing system will be re-initialized so no prob...
HTH,
<snip>
There are some situation in our shop when one of our Development
LPAR do undergo to unresponsive state(This happens when our
developers do some destructive testings or many other factors) and
even we cannot issue any commands on Console. To resolve this we
just do a de-activate and activate to re-ipl the system. As a normal
IPL procedure we issue V XCF,OFF,SYSNAME=something. Will there be
any impact to the system when we do not issue the V XCF,OFFLINE and
just do a de-activate and activate ?
</snip>
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