I've occasionally wondered why LISTCAT has RELEASE-2 on
every entity listing (1974 is "before my time"). It's amazing how
release & version numbers deteriorate in various ways (Browser
Identity strings are the worst (maybe - hideous examples abound)).
I guess we can give up waiting for "Release 3".
sas
On Tue, Dec 5, 2017 at 6:43 AM, Mike Kerford-Byrnes wrote:
> Going back a looong way, I worked on VSAM Release 1 (OS/VS1 Rel 2.6-ish) in
> 1974. It was not the happiest of times, with a significant number of errors
> and problems, especially when VSAM limits were tested. Eventually peace
> returned, and then VSAM Release 2 was announced.(I think late 1975 or early
> 1976). It supported Alternate Indexes, Improved CI Processing, GET-Previous
> (Read Backwards) and introduced RRDS and spanned records.
>
>
>
> Having endured a "busy" time dealing with Release 1, we were not best
> pleased at having to demonstrate to our masters that Release 2 would not
> visit yet further challenges to our production systems. The effort of
> proving that was almost as great as that of the original problems, which
> included a genuine Severity 1 (NO production at all) for a period of over 24
> hours.
>
>
>
> The LISTC output indicated which release had created the file and hence the
> processing that was (or was not) permitted. VSAM Catalogs could describe
> files created by either or both versions. Of course once a
> REPRO/DELETE/DEFINE/REPRO or EXPORT/IMPORT was carried out on the new
> system, it would be a 'Version 2' file and the check on how to process the
> file was un-necessary.
>
>
>
> I have just realised that was 43 years ago! It must have hurt - I can still
> remember. The phone calls to STL - with the 8-hour time difference - and
> the dump 'lost' by one of the couriers necessitating an IBM SE personally
> transporting its replacement to California in his carry on bag!
>
>
>
> MKB
>
>
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sas
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