Date: Fri, 5 Nov 2004 10:37:47 -0000
Reply-To: CICS List <CICS-L@LISTSERV.UGA.EDU>
Sender: CICS List <CICS-L@LISTSERV.UGA.EDU>
From: "Flint, Mike" <Mike.Flint@UK.EXPERIAN.COM>
Subject: CICS VSAM Copy and RLS
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I've just downloaded Leigh Compton's paper on "Getting the most out of your
VSAM data", linked to from Bob's newsletter.
On page 23, when discussing 'CICS VSAM Copy', the restriction is mentioned:
- No SHAREOPTION 3 or 4
- No VSAM RLS"
This statement, and the 'How it works' following page, lead me to believe
that CICS VC does not support VSAM RLS (it works be sitting in the CICS
region monitoring updates to the dataset being copied, so it can provide the
correct 'before' image for any records being updated by in-flight tasks when
the request is made).
Given the shift to VSAM RLS, isn't this kind of disappointing (if true)?
Would it be possible for a future release to have the copy task sit in the
SMSVSAM address space and achieve the same, but for RLS files?
Does anyone know if my conclusion is correct? Any info appreciated ...
I've just re-read the CICS VC announcement letter. In 'restrictions' it
"Shareoption 3/4 data sets (or any other VSAM data
sets that are capable of being updated from more than
one CICS region). If a request is received for a
Shareoption 3/4 data set, CICS VSAM Copy will
generate a job log message to this effect, then
continue with the request. It is up to the user to
ensure before the process begins, that the data set is
being updated only from the CICS region that CICS
VSAM Copy is processing."
I guess "any other VSAM datasets that are capable of being updated from more
than one CICS region" means VSAM RLS (odd that this wasn't explicitly
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