Legacy IT Systems: Hidden Risks Revealed - InformationWeek

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2/25/2016
09:06 AM
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Legacy IT Systems: Hidden Risks Revealed

Don't keep legacy systems around. They introduce hidden risk to your organization. Jonathan Feldman, CIO for the City of Asheville, N.C., offers firsthand advice on how to land that plane before it crashes.

Operating a mainframe, circa 1960.
(Image: HultonArchive/iStockphoto)

Operating a mainframe, circa 1960.

(Image: HultonArchive/iStockphoto)

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SachinEE
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SachinEE,
User Rank: Ninja
2/27/2016 | 1:51:26 AM
Re: 20 Year Old technology
@TerryB: I think he was just speculating. It is true that C family is a rather strong family and it is able to do anything. But creating AI with already available resources is really tough. We need a new system just for AI.
TerryB
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TerryB,
User Rank: Ninja
2/26/2016 | 12:38:20 PM
Re: 20 Year Old technology
@yalanand, where did you see this C retirement info? That is language that i5 has compiler for, I never saw where IBM planned to retire it? I could see them stopping to enhance the compiler anymore by adding new features but can't believe IBM would hang companies out to dry who have applications written in C?

Great example though. I still use RPG on i5, which has origins back to 1960's. But the RPG today, especially the free format version, looks nothing like it did. It looks like modern language now. I use it for my server side, take AJAX calls from Extjs clients. I much prefer that over server scripting languages like PHP or using raw SQL from client side, much more secure calling compiled RPG programs. You don't buffer overflow the i5, get your code to run and then modify the o/s. As character on Living Color used to say "Homey don't play that!".  :-)

Even the i5 o/s itself can hardly be labeled legacy, still the finest business o/s ever written (with apologies to MVS). They got to RISC 64 bit a decade ahead of Windows and without any of the pain. Would I implement Facebook or Natl Weather service on i5, heck no. Wrong tool for job. But any transaction based business not dealing with unstructered data, still the best and most secure server in the world.
yalanand
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yalanand,
User Rank: Ninja
2/26/2016 | 1:57:44 AM
Re: 20 Year Old technology
I agree. Legacy can be diversified. If you mean old hardware and implementation technology then these need changing, but the underlying code base, say C, why should I change that, since it has more than 15 years left before retirement. Old OS shouldn't be kept because of security and they are tedious and often cannot manage VLDS (Very Large Database Systems) efficiently.
TerryB
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TerryB,
User Rank: Ninja
2/25/2016 | 12:58:00 PM
20 Year Old technology
I'm struggling to understand what you are trying to say. If someone running hardware/os that hasn't been touched in 20 years, I'd agree that might be a problem.

I run a rack mounted IBM POWER6 server running i5os, an operating system originally invented in 1988. If you are saying it is legacy because it was created 20+ years ago, you are way off base. Last I looked a car was created about 100 years ago now, we all driving legacy machines these days?

You are in the public sector. I hope to God you are spending your tax dollars on what makes sense to get the job done the most effectively and efficiently, not because of what you think is cool/cutting edge technology.
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