In a master-master setup, what command or files do I edit so that it can auto-increment by 2?

One server increment 1, 3, 5.

The othe开发者_Go百科r server increment 2, 4, 6

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Based on this insightful tutorial: http://www.howtoforge.com/mysql_master_master_replication#comment-12927

Make Master 1 only auto-increment odd numbers by adding this to my.cnf under [mysqld]:

auto_increment_increment= 2
auto_increment_offset   = 1

Make Master 2 only auto-increment even numbers by adding this to my.cnf under [mysqld]:

auto_increment_increment= 2
auto_increment_offset   = 2