This and the post it replies to suggests we might be getting muddied in 
our terminology.

I think the original post was about DEFINING engines, rather than parking 
them or varying them on and offline.

Cheers, Martin

Martin Packer,
zChampion, Principal Systems Investigator,
Worldwide Cloud & Systems Performance, IBM

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email: [email protected]

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From:   "Warren, Cliff" <[email protected]>
To:     [email protected]
Date:   12/05/2016 16:41
Subject:        Re: Dynamic CPU ADD to a z/OS lpar
Sent by:        IBM Mainframe Discussion List <[email protected]>



Although this is not an HMC task I find I can either add or take away a CP 
on an individual LPAR with the following MVS command. 


CF CPU(1),OFFLINE    <==== Puts one CP offline in this case CP #1


CF CPU(2),ONLINE    <==== Puts one CP online in this case CP #2

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On 
Behalf Of Jon Butler
Sent: Thursday, May 12, 2016 10:34 AM
To: [email protected]
Subject: Re: Dynamic CPU ADD to a z/OS lpar

You can add CPs or memory to an active LPAR, but you can't take either 
away without stopping the LPAR.   You don't want more CPs assigned than 
you (or PR/SM) can use...it's just overhead.  In fact, unused CPs will be 
"parked" on newer CECs when underutilized. 

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