| 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 |
My customer has the following integration challenge: provide transparent database updates between an Rdb/VMS database and an Oracle/SUN database. Here's the scenario: This customer has a home grown Engineering database system on his VAX/VMS system. They bought a turn-key system to provide storage/retrieval of their vast library of Engineering drawings. Unfortunately, the turn-key system is written using Oracle on a Sun machine. In order for an Engineer to make any changes to a drawing, they need to run transactions on both the VAX and Sun systems, which requires two separate logins. What they would like to do (ultimately) is provide they same set of transactions on the VAX system and the Sun system, so that people who are usually logged into the VAX don't have to log into the Sun and vice-a-versa. Updating the Rdb system from the Sun should not be too difficult once they have Rdb v4.1, since they will be able to make use of the new SQL Services for Sun. However, updating the Oracle database from the VAX appears to be a more costly undertaking. As I understand it, they have the option of buying a gateway from Oracle and probably some precompiler to allow a VMS application to access the Oracle database on the Sun via TCP/IP. Do they need the Oracle database on the VAX or can the gateway function without it? How about writing some task-to-task code using RPC technology? Is this feasible? Is there a better way? less expensive way? other tools which can be used? Any and all suggestions appreciated... Thanks in advance, Rick C
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1087.1 | SQL Access | BEAGLE::GODFRIND | Alvin Toliver was here | Tue Feb 18 1992 09:18 | 30 |
>However, updating the Oracle database from the VAX appears to be a more costly >undertaking. As I understand it, they have the option of buying a gateway >from Oracle and probably some precompiler to allow a VMS application to access >the Oracle database on the Sun via TCP/IP. > >Do they need the Oracle database on the VAX or can the gateway function >without it? > >How about writing some task-to-task code using RPC technology? Is this >feasible? If the VAX application that updates the Oracle DB is 'stable' - that is it does not issue free-format queries, but all the queries are well known in advance, then I personally would favor writing an RPC-based application. Something that would allow VAX applications to issue requests for fixed queries (identified by some number), with the server end on the Sun executing the corresponding SQL verbs. The actual queries would then be embedded on the Sun. This can even lead to a more portable solution in the oong run. If the protocol and the client/server functions aee well architected, you should be able to use them to access other databases. This is just my opinion. You would need to cost that and compare it with a tools-based solution (I am sure Oracle can provide one). On re-reading what I just wrote, this is exactly what SQL-Access tries to achieve. Check the BROKE::SQL_ACCESS conference for info and persons to contact. /albert | |||||
| 1087.2 | ACA Services | BROKE::THOMAS | Anne Thomas DTN 264-6094 | Wed Apr 08 1992 20:16 | 13 |
I think that what you'd really like to do here is integrate the
Rdb/VMS applications with the ORACLE/Sun applications, and not
necessarily simply access the database. I'd suggest that you
take a look at ACA Services and try to integrate the applications.
When the VMS application needs to access information for the Sun
system, ACA Services can invoke the Sun application. For more
information about ACA Services, check out the VIA::ACA_SERVICES
notes conference, or contact John (MRKTNG::) Clancy or Linda
(IDE::) Storm.
ACA Services is a phenominal integration tool. If you don't know
about it, you're definitely missing out.
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