[Info-vax] OpenVMS x86-64 and RDB and DB's in general on OpenVMS

[Arne Vajhøj]

On 6/29/2015 6:46 PM, Stephen Hoffman wrote:
> On 2015-06-29 22:25:14 +0000, Jan-Erik Soderholm said:
>
>> David Froble skrev den 2015-06-29 18:37:
>>
>>> How you get to some subset of VMS users needing RDB, to "dead-end for
>>> VSI", is questionable.  In your opinion, yes.  But your opinion is
>>> not universal.
>>
>> I think there are enough VMS users that also needs/uses Rdb to make it
>> a dead-end for a VMS/x86 port without Rdb.
>
> Would the currently-entirely-hypothetical omission of Rdb hurt?  Most
> definitely.
>
> But if I've got a choice of porting off of OpenVMS to another operating
> system and also porting off of Rdb to another database as part of the
> same project, or just porting databases, I would most definitely
> consider staying on OpenVMS and porting the data from Rdb to another
> local database.   Some research and estimates of the effort involved
> would be entailed, as well as discussions around risk aversion and
> costs, obviously.

Obviously it depends on how RDB dependent and how VMS dependent
the application is.

RDB          VMS           Impact of
dependency   dependency    no RDB

high         high          will most likely migrate from VMS in anger
high         low           will most likely migrate from VMS due to cost
low          high          will most likely stay on VMS due to cost
low          low           very few left as they migrated years ago

And my guess is that the third group is smaller then the first
and the second group.

Arne