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Legacy Migration Solutions has a number
of migration paths that have provided clients with database
reengineering solutions since the late 1980’s. Our
significant experience has provided expertise to include
IDMS, IMS, and VSAM reengineering solutions to our repertoire
allowing your application to evolve to a modern computing
environment.
It all starts with design …
Many years of successful migration have
taught us among other things that in order to maintain
the flow and performance of the initial application, care
must be taken in the design stage to emulate the initial
system functionality as identically as possible. In the
case of the each database manager, it is important to
emulate the behind the scene functionality within the
application code, taking advantage of as many of the new
Database Manager characteristics as possible.
Flawless execution is paramount …
Our experience in database reengineering
is invaluable. Our tools automate the process; our people
insure its success.
You need a plan …
While every database is unique, the steps
to reengineer to the AS/400 are an exact science.
First we must learn about your
legacy IDMS database. Our tools build a knowledge base
by extracting information from IDMS database subschema
reports. The information extracted provides the knowledge
necessary for the migration tools to duplicate, with 100%
accuracy, the functionality of each IDMS statement with
the appropriate I/O statements and to generate the Data
Definition Specifications (DDS) for the AS/400 database.
Second the IDMS records and sets
are unloaded in a specific format so they can easily be
loaded into the new AS/400 database.
Third the toolset automatically
generates the DDS necessary to create a physical file
for every IDMS record and the proper logical files to
support db key, sort key, and owner/member record access.
File names are created via a customer defined or standard
naming algorithm. Field names are generated based on the
field names in the Record Description Listing.
Fourth the AS/400 database is
loaded via load programs generated by the migration toolset.
Fifth the migration toolset is
used to convert IDMS data access statements to AS/400
I/O statements. Automation results in consistent, very
readable programs that exactly duplicate the functionality
of the original IDMS programs.
The Final step in this highly
automated process is testing, cutover and implementation.
Why are we successful? …
Legacy Migration Solutions process is
proven through are many success stories. Migration of
databases and applications as anyone who has been through
the process can attest, is challenging, labor intensive
work that requires innovation and flexibility. Automating
as much of the process as possible allows for iterative
problem solving as well as consistency of output, with
resulting benefits of project speed and well documented,
highly maintainable resulting source code.
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