On 9/3/2013 3:15 PM, Clark Morris wrote:
On 3 Sep 2013 12:42:25 -0700, in bit.listserv.ibm-main you wrote:
Be aware, use of system symbols in JCL is supported in JES2 in z/OS 2.1, NOT
JES3.
Another example of where the more expensive JES lags its cheaper
brother.
That cuts both ways...
It's true that IBM's new JESx function deployment pattern, for as many
years as I can remember, has been to add function to JES2 in one
release, let them shake out the problems, and then add the capability to
JES3 in the next release e.g., WLM-managed initiators, scheduling
environments, NJE over TCP/IP, etc. Bob Rogers once joked, in an OS/390
Goody Bag at SHARE, that there was only one JES development team that
ping-ponged back and forth, from one release to the next, between the
JESes. :D
As the early exploiter, sometimes JES2 gets it wrong and must go back
and redesign things after the JES3 deployment. A good example was
WLM-managed initiator balancing in z/OS 1.8 JES2 which came out at least
a decade after JES3's WLM initiator support--which was balanced right
from the start.
z/OS 1.13 JES2 allowed in-stream data in JCL procedures are now that
capability exists in z/OS 2.1 JES3. As a follow-on, z/OS 2.1 JES2
supports in-stream symbols and so we expect the historic trend to
continue...
We also now see JES2 starting to acquire function that has been in JES3
for decades, such as eight-character job class names, job class groups,
system-name job routing, pre-execution converter/interpreter, and so
forth. I have tried ALL of these new capabilities and am very pleased to
see that our JES2 users no longer must wait for a job to get into an
initiator just to detect a simple JCL spelling error such as
DISP=(NEW,CATLF). Took 'em long enough... ;)
--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
http://www.phoenixsoftware.com/
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