On Tue, 2011-04-12 at 07:26 +0200, Michael Klaeschen wrote:
> Ravi, thanks for your reply. I was told a "Softek" product may provide 
> this function as part of data migration support. But no, we just have z/OS 
> and a couple of Redbooks, Whitepapers and the ringing sound of IBM sales 
> representatives that "z means zero downtime". Now we have to move the 
> underlying volser of the TCPIP unix file system portion and face a sysplex 
> shutdown!
> How can be that we have vast problem moving content of some physical 
> storage volume?!?! With AIX no problem, with Linux no problem, with 
> Windows no problem -- comes out of the box, I was doing myself a couple of 
> times, really easy. And the best of breed OS ever in history suffers? We 
> have to buy additional products for a simple task like that? I cannot 
> believe! 
> So, c'mon IBM, which spell do I have to type into my SYSIN card for 
> IDCAMS?
> Thank you, cheers
> Michael

The IBM rep should have said: "The z means zero __unplanned__
downtime.". I am not aware of any OS on any platform which does not
require an occasional re-initialization (reboot, IPL, whatever you call
it.) The closest that I'm personally aware of is Linux. With the new
ksplice, it is even possible to patch a running kernel.

-- 
John McKown
Maranatha! <><

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