OVMS to Unix migration

[Deskin, Bob]

You didn't mention why you wanted to move from OpenVMS to UNIX. Aside from
the actual migration issues, very often the reasons for the move are more
telling in terms of how much pain you're willing to put up with for the
presumed gain.

I'm neither an OpenVMS nor a UNIX guru. But from a PowerHouse point of view,
UNIX PH is quite generic. All those OpenVMS specific features will have to
be changed. Many of them do not have direct equivalents in the UNIX PH
world. For a start, look through the PH Handbook for superscripts that
indicate a difference between platforms. This will give you a good idea of
the syntax that will need changing and from the syntax where functionality
might be different.

For example, subfiles aren't the same. So any permanent subfiles will have
to be re-generated as portable subfiles and then brought over. The record 1
versus record 0 has been mentioned.

Most of the PowerHouse code should be the same, but there will be
differences wherever the application interfaces with the file or operating
system.

Bob Deskin              
PowerHouse Web Product Manager and Senior Product Advisor
Application Development Tools, Cognos Inc.
bob.deskin@cognos.com
(613) 738-1338 ext 4205  FAX: (613) 228-3149
3755 Riverside Drive P.O. Box 9707 Stn. T, Ottawa ON K1G 4K9 CANADA



> -----Original Message-----
> From: owner-powerh-l@sphere.swau.edu
> [mailto:owner-powerh-l@sphere.swau.edu]On Behalf Of Scroggins, Tom
> Sent: 18 April 2000 20:15
> To: powerh-l@lists.swau.edu
> Subject: OVMS to Unix migration
>
>
> We are investigating migrating our current PH application from an OVMS box
to
> Unix.  At a recent conference a collegue had several discussions with
people
> who had gone through similar migrations.  Does anyone out there have
> documentation on steps for migrating?  Several items we need to address:
>
> - We have lots of DCL.  I have to assume that it is better to emulate than
try
> to recode everything.
> - We use RMS.  All of our data is in RMS files.  How much is lost by going
> with RMS emulators?  What about migrating to an RDB?
> - How much other functionality is lost?
> - What about recompiling existing PH code?  Painful?  Easy?
>
> Any information would be appreciated.
>
> Thank you,
> Tom Scroggins
>
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