ADRDSSU - FCTOPPRCPRIMARY
DEVSUPxx - FLASHCOPYTOXRC={YES|NO}
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Sergio E. Castro
Hitachi Vantara Global Support Center
10089 Willow Creek Road, Suite 275
San Diego, Ca. 92131
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Cell: + 760 213 9255
Email: [email protected]
-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of
Michael Babcock
Sent: Monday, September 16, 2024 5:39 AM
To: [email protected]
Subject: Re: MTMGM and Flashcopy
***** EXTERNAL EMAIL *****
No one knows the answer to this?
On 9/13/2024 9:43 AM, Michael Babcock wrote:
> We currently have a MTMGM (Multi-target, Metro Global Mirror)
> implementation. Most of our volumes are in this MTMGM
> configuration, however we have a few that are not. We have a volume,
> say at address A000, that is not part of the MTMGM nor part of any
> other copyset. We have a batch job that copies to this A000 address
> using FASTREPLICATION(PREFERRED), so it uses flashcopy and the job
> completes very quickly. Back in 2019, we decided to add this A000
> volume to a metro mirror copyset. When the batch job ran, it
> couldn't use flashcopy and fell back to standard data movement. This
> extended our batch window and is not acceptable. I don't remember
> exactly what the error was but vaguely recall it was something about
> not being able to use FC to a target when that target was also a PPRC
> source.
>
> Has anything changed with regard to using FC to a volume that is part
> of the MTMGM or any other copyset?
>
> MTMGM: Our config is we have one DS8950 as our primary DASD box, we
> have another DS8950 being used as a Metro Mirror box colocated with
> the primary and we have a third DS8886 (soon to be a new DS8950) box
> at a remote site using Global Mirror. We use MTMGM to replicate from
> the primary to the MM box and using GM to the remote box.
>
> We really want to add the other volumes to the MTMGM but don't want to
> affect the batch Flashcopies to those other volumes. Clear as mud?
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