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  3. May 2014

Re: Guest Partition OS Requirements on Power8

Keep in mind that even if NPIV capability is added to IBM i, there will still be several things that IBM not only cannot currently but with near certainly will not ever support. Among them:

Live Partition Mobility. The ability to move a partition while it is running to a different physical server.

Partition Suspend Resume. The ability to put a partition to sleep from a running state and resume that partition at a later date/time.

Active Memory Expansion. The ability to make X GB of memory appear to be as much as 2X GB of memory. This uses a compression to make the total memory available to the partitions appear to be much more than the physical memory in the server.

Active Memory Sharing. The ability to move memory dynamically between active partitions. This utilizes paging within VIOS to make memory available to the partition that needs it most by priority.

Also VIOS will team together to handle failover between a pair of partitions. This enables updates to one at a time with no outage to the server. IBM i currently doesn't have any support for this concept though I suspect that should NPIV be added (doubtful) then some flavor of this would need to be supported.

If you don't need these things then IBM i can be your host partition. If you need them, then VIOS is required.


- Larry "DrFranken" Bolhuis

www.frankeni.com
www.iDevCloud.com
www.iInTheCloud.com

On 5/13/2014 12:02 PM, Roberto José Etcheverry Romero wrote:

I would say that not having to buy the IBM i per-core license for the
hosting partition is a very good reason to use VIOS (VIOS uses at least 0,5
core each, more if it had a lot of resources)... but the DCR is a good idea
anyways.


On Tue, May 13, 2014 at 12:35 PM, <rob@xxxxxxxxx> wrote:

IDK. My boss still thinks VIOS is some "wave of the future". But if we
can do all of our virtualization necessary from IBM i then that
significantly reduces the expense by not tying up hardware for VIOS, not
having to support vios and learning all that stuff. and so on.


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: "Steinmetz, Paul" <PSteinmetz@xxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 05/13/2014 11:28 AM
Subject: RE: Guest Partition OS Requirements on Power8
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Rob,

If and when your DCR would be completed, would you no longer use VIOS for
partitioning?

Paul

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
rob@xxxxxxxxx
Sent: Tuesday, May 13, 2014 10:15 AM
To: Midrange Systems Technical Discussion
Subject: RE: Guest Partition OS Requirements on Power8

I am using fiber. I was using SCSI with LTO3 back on Power 6's but even
all those switched to fiber LTO4's.
Description: 8 Gigabit PCI Express Dual Port Fibre Channel Adapter Feature
code: 5735 Right now it's virtualized from VIOS to four lpars of IBM i.
I've submitted a design change request to allow me to bypass vios.



Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: "Steinmetz, Paul" <PSteinmetz@xxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 05/13/2014 09:37 AM
Subject: RE: Guest Partition OS Requirements on Power8
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Sue / Rob,

Am I correct that if the tape library was SAS attached as opposed to
fiber, then it could be virtualized, Rob I believe this is your config.
From a performance standpoint, I've always opted with fiber over SAS
attached.

From a future roadmap viewpoint, what are the options available for tape
virtualization, fiber or SAS?

Paul

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Sue

Baker
Sent: Tuesday, May 13, 2014 9:20 AM
To: midrange-l@xxxxxxxxxxxx
Subject: RE: Guest Partition OS Requirements on Power8

"Steinmetz, Paul" <PSteinmetz@xxxxxxxxxx> wrote on Sat, 10 May
2014 22:39:33 GMT:

What are the IBM I virtualization options (host and/or guest) for
fiber attached tape, 577D?


At the present time, fibre attached tape (577D is the CCIN for feature
5735) cannot be virtualized by IBM i to any i client.

DLPARing the adapter from one partition to another is still a reasonable
way to go for fibre attached tape. I used to do this on our systems by
sending SSH commands to the HMC from my batch job stream.

--
Sue
IBM Americas Advanced Technical Sales Support (ATS) Power Systems
Rochester, MN
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