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A comment on New IBM LinuxONE 4 Express – Rack-mounted pre-configured Linux mainframe. Parent comment

Re:New IBM LinuxONE 4 Express – Rack-mounted pre-configured ... by dgacmu on Tuesday February 06, 2024 @03:44PM (#39280315)
The other definition you got isn't bad, but I think it misses the point for this discussion: it is a rack or multi rack scale computer with built-in and centrally managed features for redundancy, failover, job allocation, scaling, etc.

As an example, in many main frames, you can configure them with a spare set of CPUs, and if one of your CPUs fails, the replacement is brought online automatically and transparently, the code you write doesn't have to know about anything related to the failure.

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Re:New IBM LinuxONE 4 Express – Rack-mounted pre-configured ... by rbanffy on Tuesday February 06, 2024 @05:57PM (#39282034)
One neat thing is that the hot spares can be used during boot to shorten the time to availability. Not sure LinuxONE boxes are bought like that, but for the Z-series you can buy the machine with more capacity than you pay for and pay for it to be enabled at a later point.
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