Linked by snydeq on Fri 12th Aug 2011 03:55 UTC
OSNews, Generic OSes InfoWorld's Galen Gruman highlights 18 technologies that remain core to the computing experience for IT, engineers, and developers 25 to 50 years since their inception. From Cobol, to the IBM mainframe, to C, to x86, these high-tech senior citizens not only keep kicking but provide the foundations for many vital systems that keep IT humming.
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I play on both mainframes and Sun servers.
by rcsteiner on Sun 14th Aug 2011 00:39 UTC in reply to "RE[4]: Infoworld"
rcsteiner
Member since:
2005-07-12

There's no contest. The Unisys Clearpath mainframes we use (using an airline-focused OLTP environment called HVTIP) are able to parse a screen, do several I/Os to various files, and return a response to the customer in under 30 milliseconds, and can do that with a load of more than 600 of those online transctions per second.

I'm sure IBM's OLTP architecture (TPF?) is similar. The Unisys boxes use multiple IPs and IOPs, very fast files mapped into cache, and databases (in our case something called "freespace files") which use sets of preallocated fixed-length records and are lightning fast compared to anything relational.

Reply Parent Score: 2

Kebabbert Member since:
2007-07-27

There's no contest. The Unisys Clearpath mainframes we use (using an airline-focused OLTP environment called HVTIP) are able to parse a screen, do several I/Os to various files, and return a response to the customer in under 30 milliseconds, and can do that with a load of more than 600 of those online transctions per second.

I'm sure IBM's OLTP architecture (TPF?) is similar. The Unisys boxes use multiple IPs and IOPs, very fast files mapped into cache, and databases (in our case something called "freespace files") which use sets of preallocated fixed-length records and are lightning fast compared to anything relational.

Yes, Mainframes are good at one thing. I have never said Mainframes are slow at everything. I only talk about their cpus. For isntance, Mainframes have 296.000 I/O channels, I heard. Anyone understands that a x86 can not match that regarding I/O.

But I was talking about the Mainframe cpus. They are slow. If you pit your mainframe against a Westmere-EX x86 cpu, then your mainframe that costed x million USD, would bite the dust. "there is no contest".

I dont understand people that dont understand what I claim. I have ONLY said that Mainframes cpus are weak. I dont understand why people would want to say "hey, our Mainframe can handle lot of I/O - you are wrong!". No, I am not wrong. I have never talked about their I/O, I have been talking about their CPUs. Please read my posts again.

Reply Parent Score: 2

rcsteiner Member since:
2005-07-12

I dont understand people that dont understand what I claim. I have ONLY said that Mainframes cpus are weak. I dont understand why people would want to say "hey, our Mainframe can handle lot of I/O - you are wrong!". No, I am not wrong. I have never talked about their I/O, I have been talking about their CPUs. Please read my posts again.

Their CPUs may be slow by some measures, but if that was a concern, the architecture would simply change.

Mainframers like myself never speak in terms of CPU power because that is not a design consideration for a mainframe system. Bringing it up serves no purpose, really. What's the point? Get a supercomputer if you want to do number crunching .. that's what they're designed for.

Your statement about CPUs is much like criticizing a freight train because it can't accelerate quickly. Yeah, that's true. So? ;)

Reply Parent Score: 2