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What are you going to do with the data? Execute a program? In other
words, do you want to send some data and then have something happen? I
might recommend data queues for this. Easy to set up, free, pretty
darn reliable. Have a program at each end that processes queue entries
and does stuff with the data.

DDM is always a possibility. Then you're writing/reading a file. Is it
important to keep the data on the other system? If not, I probably
wouldn't use DDM files.

SQL and stored procedures? Certainly a possibility for remote access.
Is it record level access or set access?

Lots of ways of doing things, but something that I always look at is
what type of systems are the partners. If it's two iSeries, then I
would probably use an iSeries solution like data queues. If the
partner systems are different, then you might want to use a less
system specific solution, like SQL.

On 1/17/07, Dave Murvin <davem@xxxxxxxx> wrote:
Hello,

I have been asked to do some preliminary research on the best methods
to communicate between two iSeries machines.  The situation is as follows:

The 550 is a large zero interactive machine running Lawson M3 ERP
software (was Intentia) written in Java with Websphere running in a
separate partition.  The other machine is a 520 Express green screen
machine running EDI and the Varsity Shipping package (RPGLE), it will
also be used for development.   The EDI package will be communicating
both ways to the ERP package through possibly a Lawson interface of
some sort (we don't know the details yet) or just mapping to some
specific file layouts on the 550.  The Varsity shipping package will
be doing all the shipping calculations for customer orders, but will
also need to work both ways with the ERP package.  Both machines are
in the same equipment rack.

What do you recommend for communications and why?

DDM files over IP?
Java calling RPGLE programs?  How would we do this between machines?
RPGLE calling Java programs?  Again, how would we do this between machines?
How do the systems know about each other?
Is there some magic red book or other manual that would be helpful?
What works and what doesn't?

We also plan to talk to the Lawson people, but would like some
independent ideas too.

Thanks for your suggestions.


Dave Murvin
DRM Enterprises, Inc.


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