Reminder: MTS = Multi-Threaded Slave.
I will be talking about parallel replication at FOSDEM in Brussel on January 30th and at Percona Live Santa Clara in April (link to the talk descriptions here and here). Come to one (or both) of those talks to learn more about this subject.
MySQL 5.6 introduced replication crash safety for single-threaded replication. I already blogged about this, more