systemctl status mariadb.service - mysql

Question

i know that vendor preset: disabled is fine
i have changer the chown for mysql directory
even the chown for mysql.sock changed it three times
and still getting the same error
So any help will be thankful even if you are new
● mariadb.service - MariaDB 10.3 database server
Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor preset: disabled)
Drop-In: /usr/lib/systemd/system/mariadb.service.d
└─tokudb.conf
Active: failed (Result: exit-code) since Thu 2019-01-31 00:04:01 EET; 2min 39s ago
Docs: man:mysqld(8)
https://mariadb.com/kb/en/library/systemd/
Process: 1121 ExecStartPre=/usr/libexec/mysql-prepare-db-dir mariadb.service (code=exited, status=1/FAILURE)
Process: 1038 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status=0/SUCCESS)
Jan 31 00:03:55 localhost.localdomain systemd[1]: Starting MariaDB 10.3 database server...
Jan 31 00:04:01 localhost.localdomain mysql-prepare-db-dir[1121]: The log file /var/log/mariadb/mariadb.log cannot be written, please, fix its permissions.
Jan 31 00:04:01 localhost.localdomain mysql-prepare-db-dir[1121]: The daemon will be run under mysql:mysql
Jan 31 00:04:01 localhost.localdomain systemd[1]: mariadb.service: Control process exited, code=exited status=1
Jan 31 00:04:01 localhost.localdomain systemd[1]: mariadb.service: Failed with result 'exit-code'.
Jan 31 00:04:01 localhost.localdomain systemd[1]: Failed to start MariaDB 10.3 database server.
So any help will be thankful even if you are new .