Re: question migrating an LPAR full of guests to a new machine

[Moody, Craig]

Whoever created the Config can run the WWPN Prediction Tool and get you the new 
WWPN's in advance. 
The tool is on IBM Resource Link and requires information from the 
configuration. It's been a while but I think I had to provide the configuration 
control number as input to pull the info for a machine that was not installed 
yet. 
Question:
Where can I get more information on the WWPN prediction tool?
Answer:
For more information on setting up a SAN using the WWPN prediction tool, refer 
to the IBM System z
enhancements Hardware Announcement 109-230, dated April 28, 2009.

Craig Moody
System Z Technical Specialist
Levi, Ray and Shoup, Inc
2401 West Monroe St
Springfield, Il 62704
217 793-3800 x1813



-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Mark Post
Sent: Tuesday, May 01, 2012 3:12 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: question migrating an LPAR full of guests to a new machine

>>> On 5/1/2012 at 03:38 PM, Bruce Lightsey  wrote: 
> Our storage guy asked about NPIV and WWPN names - all I could do was give him 
> my best dumb look ( I'm a dba, not a sysadmin or systems programmer ). So, 
> what should we expect ?  I don't think networking or CKD dasd will be an 
> issue but I have no idea how the SAN will react to having a different 
> mainframe replacing the one it knows.

You should expect that everything that the SAN sees will be different.  The 
mainframe should see exactly the same things it does now, assuming the SAN 
administrator is able to figure out what the new WWPNs for the z114 are going 
to be.  That would be a tedious job if it weren't a push-pull.  Since it is a 
push-pull, I'm not sure how they 're going to be able to do it in a reasonable 
amount of time.


Mark Post

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Re: question migrating an LPAR full of guests to a new machine

[Raymond Higgs]

Linux on 390 Port  wrote on 05/01/2012 06:08:43
PM:

> From: Rob van der Heij 
> To: LINUX-390@vm.marist.edu
> Date: 05/01/2012 06:25 PM
> Subject: Re: question migrating an LPAR full of guests to a new machine
> Sent by: Linux on 390 Port 
>
> On Tue, May 1, 2012 at 11:35 PM, Robert J Brenneman
wrote:
>
> > I second what Rob said - the WWPN tool is designed for this very
situation.
> >
>
> No FICON was designed for this ;-)Maybe the FCP folks never
anticipated
> to swap out 100's of servers in a few hours and expecting it to work.
>
> And we have not even told the OP that the opposite (swapping out the
disk
> subsystem) is even more tedious because it requires changes in each
Linux
> guest. I find it hard to believe that nobody tried to put a DNS into the
> SAN...
>
> Rob

Ficon wasn't designed for switch upgrades though...  There should be an
IBM product that starts with T to fix this problem across all platforms.

Lun discovery should alleviate changes in each Linux guest a bit.  The
symbolic wwpn and symbolic wwnn fields in the nameserver could be used for
something like a DNS.  The problem is that they are optional, and the SCSI
machine loader would need a few enhancements.

Regards,

Ray Higgs
System z FCP Firmware Development
Bld. 706, B42
2455 South Road
Poughkeepsie, NY 12601
(845) 435-8666,  T/L 295-8666
rayhi...@us.ibm.com

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Re: question migrating an LPAR full of guests to a new machine

[Mark Post]

>>> On 5/1/2012 at 05:12 PM, Rob van der Heij  wrote: 
> Also, the NPIV definitions need to be carried from the old LPAR to the new
> one. Have a look at the "WWPN tool" (from Resource Link) It should help
> preparing the definitions that allow the SAN changes to be made before the
> machine is there.

If they're using NPIV.  Not a lot of people have gotten on that bandwagon yet, 
although they should.


Mark Post

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Re: question migrating an LPAR full of guests to a new machine

[Rob van der Heij]

On Tue, May 1, 2012 at 11:35 PM, Robert J Brenneman wrote:

> I second what Rob said - the WWPN tool is designed for this very situation.
>

No FICON was designed for this ;-)Maybe the FCP folks never anticipated
to swap out 100's of servers in a few hours and expecting it to work.

And we have not even told the OP that the opposite (swapping out the disk
subsystem) is even more tedious because it requires changes in each Linux
guest. I find it hard to believe that nobody tried to put a DNS into the
SAN...

Rob

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Re: question migrating an LPAR full of guests to a new machine

[Sam Bass]

In the WWPN tool you will have to specify the CHPIDs in the same order as you 
turn on NPIV on the CHPIDs or you will not get the proper results.

Sam Bass


-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Robert J 
Brenneman
Sent: Tuesday, May 01, 2012 4:36 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: question migrating an LPAR full of guests to a new machine

I second what Rob said - the WWPN tool is designed for this very situation.

> Also, the NPIV definitions need to be carried from the old LPAR to the new
> one. Have a look at the "WWPN tool" (from Resource Link) It should help
> preparing the definitions that allow the SAN changes to be made before the
> machine is there.
>
> Rob



--
Jay Brenneman

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Re: question migrating an LPAR full of guests to a new machine

[Raymond Higgs]

Bruce,

There are 2 types of wwpns.  The physicals will change when upgrading from
z9 to z114.  Starting with z196, we generate physicals instead of using
what is burned into the flash on the card.  So next time it will be easier
for physicals.

The NPIV wwpns might stay the same.  What you want to do is carry your IO
serial number forward, and avoid IOCDS changes.  Making logical changes in
the IOCDS for things like the chpid and css will change the NPIV wwpns.

If you can't carry your IO serial number forward, and/or you make IOCDS
changes, there is a tool on resource link called WWPN Tool.  You can use
this to get a spreadsheet of what the wwpns for the new machine will be.
The new machine does not need to be installed at all.

Regards,

Ray Higgs
System z FCP Firmware Development
Bld. 706, B42
2455 South Road
Poughkeepsie, NY 12601
(845) 435-8666,  T/L 295-8666
rayhi...@us.ibm.com

Linux on 390 Port  wrote on 05/01/2012 03:38:14
PM:

> From: Bruce Lightsey 
> To: LINUX-390@vm.marist.edu
> Date: 05/01/2012 04:10 PM
> Subject: question migrating an LPAR full of guests to a new machine
> Sent by: Linux on 390 Port 
>
> In the next two or three weeks we will have to move from our current
> z9 to a z114 and are trying to look for all of the "gotchas" involved.
>
> This is supposed to be a "pull-push" type of change with only the
> underlying hardware changing to start.
>
> Our current VM is our first experience with VM. We have never
> migrated a VM lpar to another machine( built new VM lpars on another
> machine, but never migrated).
>
> We are not going to change lpar definitions with one exception - we
> will be adding 1 IFL to the VM lpar.
> We won't be changing versions of zVM or Linux ( or z/OS on the other
> partitions ) or any application software.
> All consoles,network, and storage will be unplugged from the old box
> and plugged into the appropriate ports on the new box.
> All guests will, obviously, be shut down and restarted on the new
> hardware after zVM is up ( VM 5.4 ).
>
> Our storage guy asked about NPIV and WWPN names - all I could do was
> give him my best dumb look ( I'm a dba, not a sysadmin or systems
> programmer ). So, what should we expect ?  I don't think networking
> or CKD dasd will be an issue but I have no idea how the SAN will
> react to having a different mainframe replacing the one it knows.
>
> Thanks for any replies,
>
> Bruce Lightsey
> Database Administrator
> Mississippi Dept. of Information Technology Services
> 3771 Eastwood Drive
> Jackson, Ms 39211
> mailto: bruce.light...@its.ms.gov
> 601-432-8144
>
>
> DISCLAIMER: This email and any files transmitted with it are
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> disseminate, distribute or copy this e-mail. Please notify the
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>
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>

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Re: question migrating an LPAR full of guests to a new machine

[Robert J Brenneman]

I second what Rob said - the WWPN tool is designed for this very situation.

> Also, the NPIV definitions need to be carried from the old LPAR to the new
> one. Have a look at the "WWPN tool" (from Resource Link) It should help
> preparing the definitions that allow the SAN changes to be made before the
> machine is there.
>
> Rob



--
Jay Brenneman

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Re: question migrating an LPAR full of guests to a new machine

[Rob van der Heij]

On Tue, May 1, 2012 at 10:12 PM, Mark Post  wrote:

>>> On 5/1/2012 at 03:38 PM, Bruce Lightsey 
> wrote:
> > Our storage guy asked about NPIV and WWPN names - all I could do was
> give him
> > my best dumb look ( I'm a dba, not a sysadmin or systems programmer ).
> So,
> > what should we expect ?  I don't think networking or CKD dasd will be an
> > issue but I have no idea how the SAN will react to having a different
> > mainframe replacing the one it knows.
>
> You should expect that everything that the SAN sees will be different.
>  The mainframe should see exactly the same things it does now, assuming the
> SAN administrator is able to figure out what the new WWPNs for the z114 are
> going to be.  That would be a tedious job if it weren't a push-pull.  Since
> it is a push-pull, I'm not sure how they 're going to be able to do it in a
> reasonable amount of time.
>
>
Also, the NPIV definitions need to be carried from the old LPAR to the new
one. Have a look at the "WWPN tool" (from Resource Link) It should help
preparing the definitions that allow the SAN changes to be made before the
machine is there.

Rob

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Re: question migrating an LPAR full of guests to a new machine

[Mark Post]

>>> On 5/1/2012 at 03:38 PM, Bruce Lightsey  wrote: 
> Our storage guy asked about NPIV and WWPN names - all I could do was give him 
> my best dumb look ( I'm a dba, not a sysadmin or systems programmer ). So, 
> what should we expect ?  I don't think networking or CKD dasd will be an 
> issue but I have no idea how the SAN will react to having a different 
> mainframe replacing the one it knows.

You should expect that everything that the SAN sees will be different.  The 
mainframe should see exactly the same things it does now, assuming the SAN 
administrator is able to figure out what the new WWPNs for the z114 are going 
to be.  That would be a tedious job if it weren't a push-pull.  Since it is a 
push-pull, I'm not sure how they 're going to be able to do it in a reasonable 
amount of time.


Mark Post

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question migrating an LPAR full of guests to a new machine

[Bruce Lightsey]

In the next two or three weeks we will have to move from our current z9 to a 
z114 and are trying to look for all of the "gotchas" involved.

This is supposed to be a "pull-push" type of change with only the underlying 
hardware changing to start.

Our current VM is our first experience with VM. We have never migrated a VM 
lpar to another machine( built new VM lpars on another machine, but never 
migrated).

We are not going to change lpar definitions with one exception - we will be 
adding 1 IFL to the VM lpar.
We won't be changing versions of zVM or Linux ( or z/OS on the other partitions 
) or any application software.
All consoles,network, and storage will be unplugged from the old box and 
plugged into the appropriate ports on the new box.
All guests will, obviously, be shut down and restarted on the new hardware 
after zVM is up ( VM 5.4 ).

Our storage guy asked about NPIV and WWPN names - all I could do was give him 
my best dumb look ( I'm a dba, not a sysadmin or systems programmer ). So, what 
should we expect ?  I don't think networking or CKD dasd will be an issue but I 
have no idea how the SAN will react to having a different mainframe replacing 
the one it knows.

Thanks for any replies,

Bruce Lightsey
Database Administrator
Mississippi Dept. of Information Technology Services
3771 Eastwood Drive
Jackson, Ms 39211
mailto: bruce.light...@its.ms.gov
601-432-8144


DISCLAIMER: This email and any files transmitted with it are confidential and 
intended solely for the use of the individual or entity to whom they are 
addressed. If you have received this email in error please notify the system 
manager. This message contains confidential information and is intended only 
for the individual named. If you are not the named addressee you should not 
disseminate, distribute or copy this e-mail. Please notify the sender 
immediately by e-mail if you have received this e-mail by mistake and delete 
this e-mail from your system. If you are not the intended recipient you are 
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Shameless plug

[Neale Ferguson]

For the nostalgia buff without article to the hardcopy my z/Journal article
³The last 30 years of VM² is now available online:

http://www.mainframezone.com/article/the-last-30-years-of-vm

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