Regarding switching to MariaDB, that is supported, but you need to replace mysql with mariadb in one go:
# apt-get install mariadb-client-core-10.0 mariadb-server-core-10.0
should give you:
The following packages will be REMOVED: mysql-client-core-5.7 mysql-server-core-5.7 The following NEW packages will be installed: libreadline5 mariadb-client-core-10.0 mariadb-common mariadb-server-core-10.0
Regarding switching to MariaDB, that is supported, but you need to replace mysql with mariadb in one go:
# apt-get install mariadb- client- core-10. 0 mariadb- server- core-10. 0
should give you:
The following packages will be REMOVED: client- core-5. 7 mysql-server- core-5. 7 client- core-10. 0 mariadb-common mariadb- server- core-10. 0
mysql-
The following NEW packages will be installed:
libreadline5 mariadb-