Re: Migrate iTERA to PowerHA

[Jim Oberholtzer <midrangel@xxxxxxxxxxxxxxxxx>]

With PowerHA all the customer data is in an iASP leaving *SYSBAS to only 
the OS and LPP.  (and stuff that has to be there that the administrative 
domain or HA Assist replicate)

So you push the iASP over to the second system in the cluster, vary it 
on and away you go.  Now number 1 only has *SYSBAS attached.  
Upgrade/Apply PTFs at your pleasure during working hours.  When done 
bring the cluster back and repeat with number two.

Most folks actually have two copies of the iASP in separate locations 
rather than just doing the clustering described above.

It's all part of clustering.

Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


On 5/21/2013 10:29 AM, rob@xxxxxxxxx wrote:
> I think this has been answered before so forgive my continuing doubts.
> But is this setup sort of like:
>
> Power 7 #1
>
> connected to SAN
>
> Power 7 #2
>
> You do some magic that says run on #2 now.  Both #1 and #2 are using the
> same SAN but only one can be 'live' at a time?
>
> How does one upgrade the OS?  Wouldn't that require some outage?
> Considering that part of the OS may be a conversion like changing stream
> files from TYPE1 to TYPE2 (remember that?), strobjcvn, all the system
> cross reference files, etc.
>
>
> 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
> --