On 2/28/2019 3:06 PM, Tony Harminc wrote:
I'm not so sure... Is it not possible to run JES2 and JES3 at the same time on a z/OS image? Certainly you can run multiple JES2s. Yes, there are a few things that a secondary JES can't do, but I would think that would be the way to convert. Of course at some point you have to switch which is the primary JES, but is that really such a risk. Anyway, I'm not trying to minimize the effort or risk of a conversion; just not sure that it has to be Big Bang.
We run with JES2 as secondary under JES3. It's no panacea. Your approach will work for a little while as you migrate your lowest-hanging fruit. But, at some point you'll really need to bite the bullet and put up a new LPAR that runs JES2 only. Once that's up, you can migrate your applications across, one by one, from easiest to most-difficult.
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