I have problem when upgrading our redundant gateways. I lose the information in memory tags.
I created a simple client that shows values of different datatypes during upgrade of a gateway pair. The buttons are just a lazy way for me to change all values at once. I follow the recomended routine for upgrading a redundant pair.
Values before failover in 8.0.12
Values after failover
As expected, no change
Upgrade master gateway to 8.0.13
Now I have two active servers, and client is still connected to the backup gateway.
I now change the values in the tags.
Now I am lost. How will I get the backup gateway memory tag values synchronized with master?
To me it looks like they won’t talk to each other due to incompatibility.
In this situation I upgraded the backup gateway to 8.0.13
Now the client loses connection with backup and is forced to restart.
After client restart the tags have the values from before the failover. Except for the date in the UDT that has some garbage value from 1969.
Is there a way to solve this situation?
I don’t want to lose the data in the memory tags.