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Mysql wont start after rsync /var/lib/mysql/* from old to new server

Patricio Medina


Hello, I have been following the steps described in

https://forum.froxlor.org/index.php?/topic/13952-teil-migration-howto AND


to migrate a froxlor server from Debian 8 to Ubuntu Focal

Both servers were configured and running froxlor correctly.

Old server is running Mysql 7.4
New server is running Mysql 8

The problem is that after rsync var/lib/mysql/* from old to new, the mysql server in new is not starting.

The error showed is

mysql.service - MySQL Community Server
     Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
     Active: activating (start) since Mon 2021-02-22 13:22:51 UTC; 12s ago
    Process: 1173478 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
   Main PID: 1173487 (mysqld)
     Status: "Data Dictionary upgrade from MySQL 5.7 in progress"
      Tasks: 2 (limit: 38476)
     Memory: 234.8M
     CGroup: /system.slice/mysql.service
             └─1173487 /usr/sbin/mysqld

I have been searching for info but couldnt find it.

Please if someone have experienced this can share how it was solved.

Thank you




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