Selling Linux to AS/400 Shops?

cgh4be asks: "I work for an IBM business partner and each year we host a technology seminar for our customers, most of which have AS/400 backgrounds. I am the 'Linux guy' at work and have been chosen to give a 1 hour presentation to these IBMers about linux. So, my question to the Slashdot community is, what points and information should I touch on in this presentation to make it effective? I'd like to give some history about it of course, but the goal is to get them to start using it in their businesses."

Comments

Replacing AS/400 with Linux

[Corporate Troll]

My question is: why?
AS/400 are decent machines with a good operating system. It has the virtue to "just work". I'm not really sure you would want to replace an AS/400 with a Linux box. The AS/400 is -after all- a proven and stable platform.
I'm all for Linux, but not in this category of hardware.

What sold you

[ObviousGuy]

You must believe that Linux is a better choice for some reason. You're going to tell them that this young, haphazardly developed, upstart OS is a better choice than a mature, thoroughly architected, industry standard OS.

I think you'd better tell us, rather than the other way around.

As someone who has been there..

[Outland Traveller]

Our AS400 systems were very impressive-looking in a "I AM BORG" type way. They had great reliability and service, but they were older models, expensive to maintain, and didn't have very good performance. I suspect other shops are in the same boat.

We started using Linux machines as development platforms. The AS400 guys could run db2 and other IBM technologies on Linux, which was a big win. The development stations were dirt cheap and for many jobs faster than the AS400.

Eventually as that department became more comfortable with Linux they stopped placing every business application on the AS400s if a properly configured Intel/Linux box could do a cheaper/faster job without unacceptable risk exposure. It turned out quite a few applications fell into that category.

The key is to have someone who has a deep understanding of linux and also can talk to the hardcore "mainframe" admins. There is definitely a culture shock to overcome. Imagine trying to explain Linux to someone who calls service for any task that might require opening a box, pays 10k/year license fees for a glorified tar backup system, and knows so many esoteric commands and proprietary-os arcana to make VAX and UNIX together look like kiddie toys. :)

View from an AS/400+Unix+NT shop

[Bravo_Two_Zero]

Our AS/400s are actually new. The oldest one is only a year old. For us, despite our deep Unix and NT backgroud, Linux on an iSeries (there, I said it... the new name... blech) holds little more than sideshow value. For us, we have almost no investment in AS/400 admins or developers. We just add HP/Compaq servers if we want more Linux.

However...

We aren't a typical /400 shop. Someone like our parent company that has AS/400s everywhere (30+) probably sees a huge benefit to running several Linux virtual servers on an LPAR* or older single system. The key to stress is reuse of older systems. Some of the first generation RISC systems (F10s and the like) would make great highly-available Linux machines.

What's more, a company with a large investment in the hardware has probably moved all but some development off of a depreciated system. The shops that have two systems still running V3R7 won't be interested.

Part of the problem is that IBM doesn't really push economical LPAR-ing for Linux up front. In our case, they said "Sell you on LPAR? Well, if you aren't interested, we can't change your mind." Really, the Rochester salespeople are technically very knowedgeable, but they just don't "sell" sometimes. And, I can't go back and get the money now to do an LPAR "just for Linux".

The other issue is that IBM (to date, anyway) doesn't push AS/400 to SAN connectivity, which increases the value of the AS/400 as the key system in your enterprise whether you run Linux on an LPAR or not. You could, in theory, run a fairly-sized enterprise with a handful of 8xx-series machines. You'd have an NT-based FSIOP (or Novell, if you swing that way) if you had a need for it. You'd LPAR a big box to carve out several virtual Linux machines to keep your development options open. And, you'd have great MTBF on the hardware (except for the problems with the 17GB drives... those die like flies). Back all of that with an enterpise-class SAN (Shark, EMC... no Hitachi or HP XP-series because they don't support the 520-byte block size), and you can snap whole systems from LPAR to LPAR and system to system. Then, you can use a CNT-like solution for data replication over IP to a disater recovery site because all your data is on your SAN.

Sorry for the ramble, but I guess the point is that making the case for Linux on an AS/400 is part of a big picture. I'd say the cost-savings of having a handful of the same hardware in your computer room but the flexibility to run virtually any application is an outstanding point.

* LPAR == Logical PARtition... it's similar to how a Sun E10k can be carved into separate systems at the hardware level. And, yes, lots of other companies have done the same thing. It's not new.