As a user of the word, you really, really want to think about upward compatibility. Don't store the address of your product's anchor table there. Assume you will someday have multiple products. You would want to store the address of a vector of anchor table addresses. Think about upward compatibility for the layout. Include a length and a version number in your vector. Clear everything unused to zero. Think about how your products will cooperate if product A starts up first; or if product B starts up first.
Think about how your customer will recover without an IPL if the tables become corrupted. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Steve Thompson Sent: Tuesday, June 13, 2017 1:43 PM To: [email protected] Subject: Re: IBM customer anchor On 06/13/2017 08:35 AM, scott Ford wrote: > All: > > I have a question about something called 'customer anchor table entry' > . My colleague said IBM can provide this entry to a ISV like use so we > can place an address there for routines. I think it's like a vector > address . > > Has anyone heard of this ? > Yes I know about it and I kinda know the history of it. I'm not sure but I think I was the first one if not one of the first to apply for an entry when it was announced back in the mid-'90s when I was still working on ACS/WYLBUR and attended the "Vendor Disclosure Meeting"s in POK. It solves the problem of the TCBUSER field in the TCBs, and the CVTUSER in the CVT. The problem being, who owns it and who can use it and NOT step on someone else. It gives you an ANCHOR address where you can do a GETMAIN/STORAGE OBTAIN for CSA/SQA storage and store the address of that storage in your slot. How you serialize it, use it, etc., is your problem as an ISV with multiple, or just one, product. Regards, Steve Thompson ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
