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We have controller and EUM hosted on different hosts.
We have gone through the doc https://docs.appdynamics.com/display/PRO45/Upgrade+the+Production+EUM+Server.
Under upgrade procedure in second step i.e 2.b we could see we have to take mysql dump from the controller as below.
./mysqldump -u root --password --protocol=TCP -P [Controller-MySQL-Port] --databases eum_db --add-drop-database --socket=<controller_home>/mysql/mysql.sock > eum_db.sql
After taking the dump when do we need to place the eum_db.sql in EUM server. In 5.e we could see below procedure.
Import the backed-up MySQL tables to the new database:
EUM Server 4.3
./mysql -u root --password --protocol=TCP -P [EUM-MySQL-Port] --socket=<eum_server_home>/mysql/mysql.sock < <controller_home>/db/bin/eum_db.sql
Is this back up which we have taken from the Controller server or any other. Please clarify.
The Docs page has been updated to clarify your question. Do let me know if the changes help answer your question.
Ryan, AppDynamics Community Manager