Replication between MySQL 5.5 Master and Percona 5.5 Slave


we have a simple master-slave replication setup with two MySQL 5.5 database servers. Binlog format is “mixed”.

Is it possible to migrate only the slave to Percona Server 5.5 in the first step without touching the master?

Thanks in advance.

Yes as long as the version on the slave is >= that of the master it should be fine. I ran this scenario in a test environment as well (replicating from a MySQL 5.5.8 master to a Percona 5.5.19 slave) and ran into no issues.