I am sure that I assumed that IBM would get around to this... but it
doesn't seem to be happening.

Ok.. so the z990 had multiple processor books and a multiple I/O
"cages"...

And while I can run one set of "shared" processors.... and I can
dedicate processors to a lpar...

Why isn't there an option to run multiple groups of shared CPUs on a
single box?

If I can run 54 processors on a box.. it would seem to make more sense
to run groups of shared processors and setting up lpars to share them
appropriately  than trying to setup 54 procs to be shared across a
number of lpars.

For example lets say I have 1 box.  I need 2 lpars with about 10 cpu's
(BIG1 & BIG2), 2 lpars with 2 cpu's (SML1 & SML2), and 3 lpars with 4
cpu's (MED1, MED2 & MED3).   So I could setup a cpc1 with 12 cpus (for
BIG1 & SML1), cpc2 with 12 (for BIG2 & SML2) and cpc3 with 12 (MED1,
MED2 & MED3).  Thereby reducing CPU software/hardware overhead.

Or am I missing something obvious that makes it "not a good idea"?

-Rob 
Back from the land of large cpu's with little caches.



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