Re: Power HA and Journaling.

[Nathan Andelin <nandelin@xxxxxxxxx>]

Only have time for a quick reply. I was recently reading IBM publications
on Power HA and noted that they strongly recommend journaling for various
reasons - not just high availability.


On Thu, Jan 29, 2015 at 7:53 AM, Rick Mason <rmason62@xxxxxxxxx> wrote:

> Hi Midrange Group,
> This comes down again to not being able to find PowerHA for the system I
> classes to get the full grasp of the profuct.
> I found out yesterday that another jurisdiction that has almost the same
> configuration we have, had to switch to their back up Iseries only to find
> when they switched back to the source system they had a large number of
> damaged objects due to the objects not being journaled.   From what I am
> hearing, they assumed like us that in a cluster env. using geo mirroring
> that the need for journals on most objects in the data library were not
> needed like they would be in a environment such as Mimix that replicates on
> the object level.
> So, can someone help me understand this a bit better because now I am being
> told we are going to have to start journaling most objects in our data
> library and this will cause me to lose a lot more disk space.
> Not sure if what I am saying is clear or not....please let me know if you
> need more information to properly address the question.
> Thanks all...................
>
> --
> Thanks
> Rick
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