>>> On 1/30/2010 at 01:19 PM, Walter Wojcik <wal...@abinitio.com> wrote: 
> I have an LPAR with 2 dedicated IFL processors.  I would like to run 3 
> instances of zLinux.
> 
> I would like to have the following environment
> 
>                                 zVM 5.4
>                                 / | \
>                           /  |  \
>                          /   |   \
>                         /    |    \
>                        /     |     \ 
>                      zVM    zVM    zVM
>                      5.3    5.4    5.4 
>                     Build   Test  Sandbox
>                     no cap  cap     cap
>                            25% of  10% of
>                            1 IFL   1 IFL

You can do this, but I think you'll find that running Linux third-level will 
result in excruciatingly bad performance.  I think you would be better off 
creating 2 LPARs, one running z/VM 5,3 and the other z/VM 5.4, sharing the IFLs 
between them, and using both LPAR weights and CP SHAREs to balance things out 
the way you want.  You don't say what model of System z you're running, so I 
don't know if the additional overhead of running 2 z/VM instances will take up 
too much of your capacity or not.  I would suspect that the additional people 
time z/VM systems management would be more significant than hardware resources, 
however.

> If this is possible could you direct me to the correct documention to 
> accomplish my goals? 

Do you mean z/VM documentation, or Linux?  Depending on the Linux 
distribution(s) you want to install, you could take a look at the 
Virtualization Cookbooks that Mike MacIsaac et. al. have on the IBM Redbooks 
web site:
http://www.redbooks.ibm.com/cgi-bin/searchsite.cgi?query=virtualization+AND+cookbook

There's one for SLES9, SLES10 SP2 (SP3 should not be any different), RHEL4, and 
RHEL5.2.


Mark Post

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