RE: Changing physical drives to virtual

Pete's presentation is very complete but there are a couple of landmines to
step on if you don't follow his procedures as he lays them out.

I think Holger pointed out that if your existing partition has the "all
resources" then you'll have to change that partition profile in order to
provide processor/memory to the new partition.

One think I don't think Pete elaborated on (most likely due to time in the
presentation) is on the layer 2 switch you create, Ethernet Bridging, DO NOT
assign a IP address on the bridge itself. IBM has very good documentation
on building the Ethernet Bridge.

http://www-01.ibm.com/support/docview.wss?uid=nas8N1011193

IBMs comment:

Important Note: IBM suggests that the selected Ethernet resources be used
for only layer-2 bridging and not for IBM i TCP/IP configuration. There is a
significant increase in processor usage for any host traffic that uses
bridged resources. In addition, any line description that is used for
bridging receives many frames that are not useful to the TCP/IP stack. These
frames use unnecessary processing resources. The virtual Ethernet line on
the host does not require an interface. You only need the physical and
virtual lines active for the bridge function to work. You should not have an
interface on the physical line used for the bridge either. Create a separate
physical line & interface for network traffic on the Host.

Those who do not heed that advice will be very sad. Another way to say
this is; if you want to see 100% CPU and no other activity go for it.
(Believe me I tried it on purpose to see how bad it really was)



--
Jim Oberholtzer
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Thomas Garvey
Sent: Friday, July 15, 2016 2:16 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Re: Changing physical drives to virtual

Great resource!

Thanks for all the responses and also thanks to Pete Massiello!



Best Regards,

Thomas Garvey


On 7/15/2016 12:37 PM, Steinmetz, Paul wrote:

Tom,

Check out the white paper by Pete Massiello.
Building Virtual IBM i partitions on hosted IBM i.

I did something similar years back, all steps included for both the I and

HMC, both host and client partitions.

If you any specifics, I may be able to help.

http://www.neugc.org/images/23A_-_Step_by_step_guide_to_Creating_Virtu
al_Partitions_Hosted_by_IBM_i.pdf

Paul

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Thomas Garvey
Sent: Friday, July 15, 2016 12:02 PM
To: Midrange Systems Technical Discussion
Subject: Changing physical drives to virtual

OK, I've really been spinning my wheels on this and getting nowhere.
Perhaps someone can point me to the definitive manual or Redbook to direct

me.

I have a Power7 server with a single v7r1 partition that owns all

hardware, managed by an HMC.

The disk drives are configured as physical disks.
I need to create a new partition to install v7r3 but can't figure out how

to share the disk storage.

I think my problem is that the v7r1 partition has the physical drives

defined as just that.

I think I've read that to now create virtual disks from those physical

drives that can be shared between the partitions the content on the physical
drives will be wiped out.

Someone please tell me there's another way.

Tom Garvey


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