Make sure just not a reboot but shutdown linux and then logoff/logon the z/VM 
host.  Then the directory changes should be available.


Jon Nolting
System Administrator
Engineering IT

[email protected]
425-295-1733 (Cell)

-----Original Message-----
From: Grzegorz Powiedziuk [mailto:[email protected]] 
Sent: Tuesday, September 8, 2020 8:47 AM
To: [email protected]
Subject: Re: adding cpus without logoff

On Tue, Sep 8, 2020 at 10:13 AM Mark Post <[email protected]> wrote:

>
> Gregory,
>
> In short, no. When a z/VM guest is logged on, it is created using what
> is in the currently active CP directory. Any and all limitations, such
> as the maximum amount of virtual storage, number of virtual CPUs, are
> encoded in the control blocks for that guest. Any attempt to exceed
> those limits will be denied. The only way to get the new, "larger,"
> limits will be to log the guest off and back on again.
>
> There are likely tools out there that run from a privileged account that
> will go into the control blocks for the target guest and change things.
> As you might expect, that sort of thing can be dangerous. Still, if
> getting this done is important enough, you could ask on the IBMVM
> mailing list to see if such a thing is out there, and where to get it.
>
>
> Thank Mark for confirmation. For now I will stick to the "safe" way. Well
reboot it is.
Fortunately I might have an opportunity to do it today.
I am planning to do "Machine esa 16"  (which is the total number of cpus we
have in the box)
and then just put CPU statements 00-07
>From what I just tested this should give me initial 8 cpus and, and define
cpu will work up to 16
thank you
Gregory

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