Re: LPAR - micro partitioning an i5-520

Stefan Tageson schrieb:

but I still don't get it: is my calculation correct or do I have to know

something
miraculous to get the numbers I need ?

In other words, I can't divide that single POWER5 processor like I

thought ?

What is the math behind that ?
The Redbook for VPM only talks about a 2 CPU system and gives 1 CPU

to a secondary partition with Linux, allowing the first LPAR with i5-OS to get

the whole processor power of 2 CPUs when running in uncapped mode.
I can't even go to uncapped mode, because my system is "not able" to !

Sigh,
Philipp

Hello Philipp,

You can divide a Power5/5+ processor in tenths som the smallest partition will have 0.1 processor

A "whole" Power5/5+ processor is roughly 3000-3800CPW.

Some of the smaller i5 520 does not have one processor capacity - in your case just 0.32 processor. According to your own formula that will give you the posibillity to create three partitions.

Makes sense?

Regards

Stefan Tageson

Informatikk Sverige AB

Propellergatan 1, SE-211 19 Malmö, Sweden Cell : +46 (0) 732 36 99 34

stefan.tageson@xxxxxxxxxxxxxx

Hello Stefan,
Now I really learned something ! :-)
You mean to say that the 1200 CPW CPU in the 520 is a geared down
version of the 3800 CPW CPU - just for "political reasons" ?
How is this accomplished (technically) ?
In older models they used to reduce the frequency of the processor
or left out some cache chips, this doesn't seem to work with the newer
chips like the POWER5
Now I understand why you can use that "accelerator" license key
to simply activate the full processor power ...
What happens to those "processor units", then ?

Philipp