A.When uptime is critical
B.When data must be refactored
C.When application concurrency is static
D.When data loss is unacceptable
E.When application is a single point of failure

A.–skip-networking, to prohibit access from remote locations
B.–reset-grant-tables, to start the server with only the mysql database accessible
C.–read-only,to set all data to read-only except for super users
D.–old-passwords, to start Mysql to use the old password format while running without the grant tables