Alex,
1. What about ICF processors? Do you run ICF LPARS on regular CP's?
If yes, then I would strongly recommend to change it. It is strongly
recomended to use dedicated processors for CF, and ICF engine is much
cheaper.
2. I don't like idea to dedicate CPs for tests. IMHO t should be enough
to dedicate CP weight. Such weight can be easily and quickly changed
from "test mode" to "production mode". And I "don't buy" the requirement
- IMHO it's not justified.
3. If you reaaly want to assign 6 CPs for 2 LPARS then all the rest have
2 CPs. Not so bad, assuming you have ICFs for ICF LPARs. Of course "not
so bad" means you can share the CPs, but I don't know your CPU power
requirements - maybe you need 250 MSU and you have only 160 MSU. The
number of CPs is not primary issue here.
4. LPAR reactivation. Yes, it is possible. Yes I did it. No, it doesn't
affect other LPARs. But in your case - change CP from shared to
dedicated - I believe - you will need to deactivate all LPARs using
those CPs. However the only risk is failure of the operation - you'd get
a message saying the change cannot be performed.
BTW: I still suggest to assign "equivalent CPU power" in shared CPs
instead of dedicating the CPs.
BTW: I remember I worked on 1 CP. We had 5 LPARs then. It was "not very
strong" 9672-RA4 (37 MIPS).
--
Radoslaw Skorupka
Lodz, Poland
W dniu 2011-07-18 05:51, Alex Wang pisze:
Our CPC (2094-S18-708) now has 8 Physical CP and has 1 production LPAR, 2
maintenance LPARs, 2 ICF LPARs and 2 test LPARs running at the moment.
Currently, all LPARs are equipped with shared CPs and have weight values
assigned. The details are as follows.
production LPAR 1
initial LCP 8
reserved LCP 10
weight 40
The maintenance LPARs, ICF LPARs and test LPARs have similar configuration but
less weight valule specified.
Now, we plan to assign each test LPARs with 3 dedicated CPs due to some test
requirements. That is to say, the 2 test LPARs will cost 6 physical CPs in
total.
We have referred to the z9 PR/SM planning guide. It's saying we just need to
create new image profiles and deactive/active test LPARs. Then the changes will
be available.
Meanwhile, however, does this operation have any impact on other LPARs running
in the same CPC? For example, do we need to deactive the production LPAR and
change its image profile. Because there will be only 2 PCPs available for it,
however, it has 8 LCPs configured.
That would be great if everyone of you could show me the solid proof of a
manual or based on your work experience.
Thanks in advance!
P.S.
We also consider a senario saying we have a CPC with only 1 PCP. If we set a
LPAR with 1 dedicated CP. Can we have another LPAR run in the same CPC with 1
shared LCP?
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