SET DATE= in IPL Proc

[Stuart, David]

Evening all,

 

A question about SET DATE= in an IPL proc:  Hints and Tips states that a SET DATE=…,CLOCK=… will cause a recalculation on the TOD Clock.

 

What I need to know is if that only affects the TOD for the LPAR where it is issued (I hope!), or if it affects the TOD Clock for the entire System?

 

I have need to issue a SET DATE= in an IPL Proc, in one of the Dev/Test LPARs, and not have it affect the other LPARs, especially Production (no z/VM).

 

System is a z9 BC (2096).

 

 

Thanks,
Dave

 

 

Dave Stuart

Principal Info. Systems Support Analyst

County of Ventura

805-662-6731

David....@ventura.org

 

[Kris Buelens]

Just for one LPAR.
Like z/VM, PR/SM uses SIE, and the SIE descriptor block has a field "TOD offset", the delta to apply to the machine clock for the given LPAR (or Virtual Machine if z/VM is the host)

(who would be willing to use LPARs or virtual machines if one guest could change the clock of other guests?)

Kris Buelens,
     --- VM/VSE consultant, Belgium ---
-----------------------------------------------------------------------

_______________________________________________
VSE-L mailing list
VS...@lists.lehigh.edu
https://lists.lehigh.edu/mailman/listinfo/vse-l