I can't help but think about my long time job at P&H Mining when reading of
companies taking 10 years to get off the mainframe. I was hired in 1985 to
install MVS on a 3081 running 5 DOS guests and 2 VS1 guests under VM. I was
a little concerned when I would go to a meeting with my boss shortly after I
was hired and he was trying to convince a higher level of management that we
need to convert to MVS.
I installed MVS/SP 1.3.5 in Aug. 1985. The 2 VS1 guests were easy to
convert. One ran 20 Cadam scopes, and the other ran Nastran jobs, an
engineering language P&H used for finite element analysis, whatever that is.
I think it took about 2 years after that to convert all of the DOS guests to
MVS which ran the business part of the datacenter.
In 2004, they made the decision to get off of the mainframe. We had bought
Joy Mining in Pennsylvania in the early 90's, a maker of underground mining
equipment. P&H made above ground mining shovels, so that was a good fit
business wise. Joy decided to get off the mainframe rather than convert all
of their really old home grown software for the Y2K conversion. By early
1999, Joy finished their conversion, and ran everything on their own machine
in PA again on an Aix platform. Meanwhile, P&H converted all of their
software with their own staff and lots of consultants.
A big part of the conversion was that we were running SAP software. Joy
converted everything they ran to different SAP software modules. A few
years after the conversion, P&H decided to get off of their MVS mainframe
and run on Joy's system in PA. They planned on an 18 month conversion
effort. That actually got extended by 3 months, so the whole conversion
effort took 21 months. I believe the whole conversion to AIX was made
possible when SAP decided to allow P&H to run on Joy's computer system
without buying another SAP license. Originally, SAP was going to make P&H
buy a new license for their software. Then, they decided that if Joy & P&H
ran on the same computer system, they wouldn't have to buy a new license,
saving at least a million dollars or more.
My whole point in all this is that conversions to or from MVS don't have to
take 10 years. It often does, but it doesn't have to. I think at P&H we
had several advantages. We had MVS installed for only 21 years at the time
we got off of it, not 40 like a lot of shops. Also, much of the software we
had was packages. We also had a smaller 115 MIP machine - an MP3000.
I have to say, I wish P&H hadn't converted off of MVS, but it probably was
the right thing for them to do givin all of the circumstances. It would be
a lot nicer driving 5 miles to work every day from my home in the Milwaukee
area than driving 170 miles to Dubuque every Sunday and back again on Friday
after work. Oh well!
Eric Bielefeld
Sr. Systems Programmer
IBM Global Services Division
Dubuque, Iowa