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-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of Elardus Engelbrecht
Sent: Wednesday, March 28, 2018 9:01 AM
To: [email protected]
Subject: Re: change data capture for VSAM

Rex Pommier wrote:

>I'm curious if anybody can provide me iith the names of any companies that do 
>real time change data capture of VSAM datasets.  We've looked at a couple 
>vendors who will remain nameless to protect their and our interests.  
>Specifically what we're looking for is something that can grab VSAM data 
>records as they're being written from either batch or CICS sources, and write 
>the VSAM record to a log file or MQ queue so it can be shipped off platform 
>into a data warehouse.

You got good replies, but if no-one can suit your needs, I have a possible 
suggestion.

What about rewriting the applications to write to TWO datasets? One for your 
usual VSAM datasets and its friends and another dataset containing changed 
(new/changed/deleted) records?

Yes, it is a real PITA to avoid vendors in this way beside that is double work, 
longer runtime, more diskspace, etc.

Or do a compare of before/after changes and ship the differences to that 
warehouse. Of course there is that usual overhead of time-consuming comparing 
work.

Related question: Do those vendors use 'hooks' to replace the SVCs to intercept 
these VSAM I/Os?

I hope you can find a good solution.

Groete / Greetings
Elardus Engelbrecht

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