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I will try to update my MariaDB from 5.5.56-MariaDB to 10.3.9-MariaDB. However my current version was configured or located into another directory. How should i do it?

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  1. take a backup. either a) a copy of the datadir, or b) a sql dump (preferably both)

  2. install the mariadb-10.3 packages

Normally only a single major upgrade is supported like 5.5 -> 10.0 -> 10.1 -> 10.2 -> 10.3 is supported however you may as well try and having your backup ready, you can install the datadir back.

Run mysql_upgrade after the upgrade.

Or, clear the datadir, run mysql_install_db -u mysql and then load the new version with the mysqldump.

Test on a test server, if downtime or potentially incompatibly is an issue.

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