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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