Re: IBM i vs VIOS for Host Partition

It is an LPAR so yes VIO Server does need CPU/Memory, but so would a hosting IBM i LPAR (back the future with a thin primary), so other than the items Larry mentioned in terms of VIO Server support and some of the intricacies of running it, there is very little difference. If anything the IBM i Hosting LPAR would need more memory and processor due to how it handles the virtualization.

Since most boxes have more processors turned up than IBM i licenses, running the VIO Server on one of the processors not involved in running IBM i is doable. I do that today on my system. You actually save processor resources with VIO Server in that way as compared to IBM i.

Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


On 4/17/2013 3:02 PM, CRPence wrote:

On 17 Apr 2013 09:34, Kirk Goins wrote:

> I am curious about the Performance differences, if any, when hosting
> IBM i on IBM i vs IBM i on VIOS. Are the 2 methods about the same?
> Wildly Different?
> Do I need more Memory or CPU generally speaking for one vs the other
> etc?
> <<SNIP>>

Doesn't the VIOS require some portion of a CPU to be dedicated? Not
to imply that means more CPU is required, just that the portion of the
CPU dedicated to elsewhere is therefore never available to the IBM i,
even when the owner of that partition of the CPU is idle. I believe a
dedicated portion of memory also may be required by VIOS.?

-- Regards, Chuck
--