请问mysqldump备份时开启master-data 选项 会不会增加数据库资源，默认情况下配置文件中log-bin是注释掉的

不会对数据库增加额外的负担，只是记录一下主节点（备份节点）、binlog、偏移量等信息。这个参数只在需要做主从的时候使用，一般设置成2，手动获取语句然后搭建从节点。

If the option value is 2, the CHANGE MASTER TO statement is written as an SQL comment, and thus is informative only; it has no effect when the dump file is reloaded. If the option value is 1, the statement is not written as a comment and takes effect when the dump file is reloaded. If no option value is specified, the default value is 1.
上面是官方解释，其实就是在进行dump的时候所带的set master是否会在后期导入时起作用