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Hi,I have installed v188.8.131.52 in RHEL OS and have some QMs running in the server. For migration, i have installed MQ v9.3 in the same server with different path as /opt/mqm9 and installation is Installation2.I have migrated one of the QM from v184.108.40.206 to v9.3 using the steps:1 ./opt/mqm9/bin/setmqenv -s2 setmqm -q <QMName> -n Installation2This step migrated my QM to v9.3Now i am trying to rollback to v220.127.116.11. Is it possible to rollback to previous version using setmqm -q <QMName> -n Installation1 ?will this command automatically roll back the QM to previous version
Hello,As soon as a Queue Manager is started with a new version of MQ (distributed), there is a modification of the internal structures of the objects, and a rollback is not possible.In the case of a multiple installation, the only solution is to destroy the Queue Manager in version 9.3, recreate it in version 8008, and re-inject the configuration (which of course has been saved before!).
I'm curious as to why you want to go back to version 8008, which has been out of support for over three years.
Note: in the past, I have used the "multi-installation" mechanism to have several versions of MQ on the same server.In theory, this is a good idea. In practice, I find it uncomfortable, with the risk of not using the correct version of the binaries.In production, it is almost dangerous to have two versions, not because of MQ, but because of human errors.Today, I don't use and don't recommend multi-installation.Regards.
Thanks Luc for the inputs. We have some of the legacy applications for ex: (WMS v9.2 which is out of support and documentations not available whether it will support MQ 9.3 or not). so we have to migrate to 9.3 and if WMS doesn't support MQ v9.3, then I have to rollback the QM related to WMS to v18.104.22.168 (till WMS is upgraded to the right support version)I am trying to come up with the rollback approach using multi-installation mode.