[mysqld]
binlog-do-db = databasename1
binlog-do-db = databasename2
binlog-do-db = databasename3
……
且不可写成binlog-do-db = databasename1，databasename2，databasename3
mysql会把databasename1，databasename2，databasename3，而且在show slave status\G;显示时不会报错，排错很麻烦的。
原文：http://www.cnblogs.com/zhangjunqiang/p/6957707.html