You specify character sets with the rs_charset parameter
in the Replication Server configuration file. You can also specify
a character set for writing the Replication Server configuration
file. This parameter is CONFIG_charset.
For replication to work properly, the Replication Server’s
character set must be the same as the character set of the data
servers it controls. It should also be compatible with the character
sets of all other Replication Servers in your system.