I need information about mariadb. Having a license npl com mysql db when I removed the old virtual server and it was creating new ones, the server crashed, making disconnect users for a few seconds. After making changes to mysql I have not had any problems.

my.cnf

Code:
innodb_doublewrite = 0
innodb_log_file_size	= 512M
innodb_buffer_pool_size	= 2G
innodb_log_buffer_size	= 4M
innodb_file_per_table	= 1
innodb_open_files	= 400
innodb_io_capacity	= 400
innodb_flush_method	= O_DIRECT
log-bin = 0
innodb_support_xa = 0
innodb_flush_log_at_trx_commit = 0
The first question, as default_storage_engine I can always use InnoDB?

There are special modifications to be carried out? thanks