[Search for users]
[Overall Top Noters]
[List of all Conferences]
[Download this site]
| Title: | DEC Rdb against the World |
|
| Moderator: | HERON::GODFRIND |
|
| Created: | Fri Jun 12 1987 |
| Last Modified: | Thu Feb 23 1995 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 1348 |
| Total number of notes: | 5438 |
863.0. "ADABAS to Rdb conversion???" by NYTP11::TIM () Tue Feb 12 1991 22:44
I have been contacted by a customer who is in need of information
regarding a possible conversion of an ADABAS application. The application
is running on a VAXcluster, and has upwards of 400 concurrent users. The
customer has a 9000, and is considering minimally converting the
database to Rdb, with the potential of performing a full conversion of
the application onto a DECtp platform. With all of this in mind, is
anyone aware of the existence of any conversion tools which might
facilitate this conversion? Has anyone any experience with such an
ADABAS to Rdb conversion, and if so, could you give any indication of
the effort involved? Any information would be greatly appreciated.
| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 863.1 | What does application use? | NOT003::DENTI | Ian Dent @NOT, Nottingham, UK | Wed Feb 13 1991 12:49 | 26 |
| A key thing to find out is how the application code accesses the
Adabas database.
Is it written in Natural, a 3 GL with Adasql embedded or using direct
calls to Adabas database interface.
If Natural then the Natural/Rdb product from Software AG may help
you. This is claimed to allow same Natural V2 syntax to work against
Adabas or Rdb (or both) databases.
If Adasql then could replace SQL with embedded SQL statements. Software
AG SQL is different to everyone else's SQL so you need a detailed
examination of what features are used.
If direct calls then you need to re-write all calls in SQL. This
will be a big job as logic of programs may have to be changed.
Conversion of database from Adabas to Rdb may be complex. Adabas
is not relational and allows repeating fields and groups within
a table. The design of the Rdb database is likely to be
very different from that of Adabas and changes to programs to support
the new design would be needed. Natural/Rdb may help in converting
the data as a program could be written to read from Adabas and write
to Rdb.
Ian
|
| 863.2 | If no DECtp, then what? | TRCO01::MCMULLEN | Ken McMullen | Wed Feb 13 1991 20:14 | 5 |
| You mention that your customer is a "potential DECtp" customer. If they
are not going to use ACMS, then what software are they going to use for
development?
Do you know why they want to convert from ADABAS to Rdb/VMS?
|