| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 995.1 | "It don't come easy" -George Harrison | MBALDY::LANGSTON | The secret is strong ears. | Tue Sep 24 1991 22:30 | 35 |
| Re:
� 2. If customer is willing to write task-to-task programs for access,
� what communication products are required ?
From SPD 26.88.06, for
DECnet/SNA VMS APPC/LU6.2 Programming Interface V2.2:
The DECnet/SNA VMS Advanced Program-to-Program Communica-
tions/LU6.2 Programming Interface (APPC) is a layered software
product that allows user-written applications running on suit-
ably configured VMS systems either within a DECnet network or
running VMS/SNA software to exchange messages with cooperating
applications in an IBM[R] host. The APPC software exists in the
VMS system as a shareable image. Access between the cooperating
Digital and IBM applications is via the DECnet/SNA Gateway or
VMS/SNA software.
The APPC product is a set of subroutines which are called by
VMS programs which act as Logical Unit 6.2 (LU6.2) transaction
application programs. These subroutines allow a VMS transaction
application to:
o Activate and deactivate sessions
o Allocate and deallocate LU6.2 basic and mapped conversations
o Send and receive data
o Request confirmation and confirm transactions
o Send and receive error information
o Define and delete local LU names and TP names
o Supply program initialization parameters
o Supply session-level security and inbound conversation level
� 3. Do we have any tested sites for these databases access ?
We have used APPC/LU6.2 to access AS/400 and S/38.
Bruce
|
| 995.2 | Natural/Rdb ? | NOT003::DENTI | Ian Dent @NOT, Nottingham, UK | Wed Sep 25 1991 15:22 | 12 |
| To allow access to both Rdb/VMS data and IBM Adabas data or to provide
a transfer method from Adabas on the IBM to Rdb/VMS you could consider
using Natural.
This will run on the Vax and communicate with the IBM via a product
called Net-work from Software AG. This uses LU6.2 as a communication
protocol.
A Natural program on the Vax can read from an IBM Adabas file and
write the data to a Rdb/VMS table (or vice versa).
Ian
|
| 995.3 | What operating system is used on the two IBM systems? | BROKE::THOMAS | Anne Thomas DTN 264-6094 | Mon Oct 07 1991 23:35 | 13 |
| Whenever asking about interoperability to IBM systems it's very important
that you identify the IBM environment that you're working with. For
example, Adabas runs on MVS, VM, and DOS/VSE systems. SQL/DS runs on
VM and DOS/VSE systems. The applications can run under CICS, TSO,
IMS-DC, CMS, or a number of other environments. I can't tell you what
solutions are available until I know more about the IBM environments.
Also, what level of interoperability is required? Do they need to be
able to directly access (read and write) data in place on the IBM systems
or can they look at snapshot data which is downloaded to the VAX?
If the customer uses VM (as opposed to DOS/VSE) then you might be able
to use DTF to handle all of your data transfer requirements.
|
| 995.4 | Further info. on Existing DB | TAIJI::JULIACHEONG | | Tue Oct 15 1991 12:13 | 19 |
| Sorry for the late response. I am working on the proposal for the
Steel and Iron opportunity in Shanghai during the past two weeks.
Access to Easynet is quite difficult from there.
Thank you for the replies. As for .-1, the customer's existing
machines are running:
IBM 4381 + MVS + ADABAS/Natural
IBM 4341 + DOS/VSE + SQL/DS
Unisys 2200 + OS 1100 + MAPPER
The interoperability features that they are looking for from Rdb/VMS to
these databases are bi-direction (interactive) read/write access.
I will try to provide any additional information that you think
appropriate.
Regards.
Julia.
|
| 995.5 | Yes you can, may be! | SIERAS::NAKAPPAN | | Tue Oct 15 1991 20:55 | 19 |
| With regard to interoperability between Rdb/VMS and SQL/DS, I
would suggest that you contact NOMAD/VISTA, a third-party database/4GL
environment that according to the marketing literature claims
transparent access from a desktop (MS/DOS) to both systems.
With regard to Unisys/Mapper, there is no known interoperability
product. Mapper has been ported to Unix System V environments, but
not to Risc/Ultrix. If the investment in Mapper is not significant,
I would propose a migration effort. You may also want to post your
note in FASDER::UNISYS_CONVERSION.
However, there are terminal emulator products available for UNISCOPE
protocol emulation on the VTxxx terminals to connect into the Unisys
2200 environment. Please see Note 21.4 of the above-referenced
Notesfile.
Hope this helps
Murli
|