The Ultimate Guide to High Availability with MariaDB
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New to MariaDB Upgrade Problems on Windows OS

I have installed MariaDB 10.4 and 10.11 on a test workstation, created a blank DB in 10.4, stopped all MariaDB services then copied the entire 10.4 data folder and had it overwrite the 10.11 data folder location. I started the MariaDB services and see the test DB listed when I run Show Databases; . The problem is when I run mariadb-upgrade I get the following errors: mysql/gtid_slave_pos is correct, mysql.innodb.index_stat does not exist etc....

I am practicing the upgrade since I will be moving a MariaDB 10.2 to 10.11 but could not find a 10.2 download. Where did I go wrong with this process? From what I have read running mariadb-upgrade is required when copying the DB's to a new version.

Answer Answered by Vladislav Vaintroub in this comment.

Those errors you see do not prevent the database from starting, and are fixed by running mariadb-upgrade. mariadb-upgrade is there exactly to fix the missing and incorrect (in the target version) system tables.

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