Re: IOPless machines and multiple CPUs

Configuring an LPAR with more cores than licensed ends up with a message
saying that you are over entitlement but it still uses those cores.
One of the reasons I don't understand i hosting i is the economics of the
exercise. It is a lot more expensive to use IBM i to virtualize
storage/network than the almost free VIOS.
On a big machine you might need more than 2 entire cores for IO and that
gets expensive quickly.

Roberto

On Sun, 26 Jul 2020, 12:39 Patrik Schindler, <poc@xxxxxxxxxx> wrote:

Hello,

imagine a newer POWER machine with, say, four CPUs. IBM i is licensed to
one CPU, so I guess when you give the LPAR more than one, it won't be used
for running "normal" code. Right?

Does anybody know (and provide evidence) if a second assigned CPU will be
used as "helper CPU" for I/O? Not exactly an IOP, since this involves
drivers and other stuff. My thinking stems from the z-world where
processors can be freely configured to specialized tasks (I/O, running
Linux, running Java, …). The number of CPUs often influences licensing
cost, which probably was one of the reasons to invent this feature in the
first place.

Thanks!

:wq! PoC

PGP-Key: DDD3 4ABF 6413 38DE - https://www.pocnet.net/poc-key.asc


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