IBM: Making the Mainframe Cool Again
May 7, 2025
No AI, just the dinobaby expressing his opinions to Zellenials.
I a ZDNet Tech Today article titled “IBM Introduces a Mainframe for AI: The LinuxONE Emperor 5.” Years ago, I had three IBM PC 704s, each with the eight drive SCSI chassis and that wonderful ServeRAID software. I suppose I should tell you, I want a LinuxONE Emperor 5 because the capitalization reminds me of the IBM ServeRAID software. Imagine. A mainframe for artificial intelligence. No wonder that IBM stock looks like a winner in 2025.
The write up says:
IBM’s latest mainframe, the LinuxONE Emperor 5, is not your grandpa’s mainframe
The CPU for this puppy is the IBM Telum II processor. The chip is a seven nanometer item announced in 2021. If you want some information about this, navigate to “IBM’s Newest Chip Is More Than Meets the AI.”
The ZDNet write up says:
Manufactured using Samsung’s 5 nm process technology, Telum II features eight high-performance cores running at 5.5GHz, a 40% increase in on-chip cache capacity (with virtual L3 and L4 caches expanded to 360MB and 2.88GB, respectively), and a dedicated, next-generation on-chip AI accelerator capable of up to 24 trillion operations per second (TOPS) — four times the compute power of its predecessor. The new mainframe also supports the IBM Spyre Accelerator for AI users who want the most power.
The ZDNet write up delivers a bumper crop of IBM buzzwords about security, but there is one question that crossed my mind, “What makes this a mainframe?”
The answer, in my opinion, is IBM marketing. The Emperor should be able to run legacy IBM mainframe applications. However, before placing an order, a customer may want to consider:
- Snapping these machines into a modern cloud or hybrid environment might take a bit of work. Never fear, however, IBM consulting can help with this task.
- The reliance on the Telum CPU to do AI might put the system at a performance disadvantage from solutions like the Nvidia approach
- The security pitch is accurate providing the system is properly configured and set up. Once again, IBM provides the for fee services necessary to allow Z-llenial IT professional to sleep easy on weekends
- Mainframes in the cloud are time sharing oriented; making these work in a hybrid environment can be an interesting technical challenge. Remember: IBM consulting and engineering services can smooth the bumps in the road.
Net net: Interesting system, surprising marketing, and definitely something that will catch a bean counter’s eye.
Stephen E Arnold, May 7, 2025
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