Hi, I am using Ignition 7.9.4. The first PC has Ignition and mysql installed, the second has only Ignition. I set the redundancy to warm and the history mode to partial. When I force to switch between master and backup, the backup system does not store history data, when I go back to the master, the data is not sent to the master, I can see that in an easy chart.
Are both master and backup pointing at the one MySQL? Is MySQL shutting down when the master shuts down? Ignition doesn’t do anything on its end to migrate data after switchover–your DB needs to accept from either gateway. If you need DB redundancy, too, you need to implement a redundant DB separately and point both Ignition master and backup at the DB cluster.