有没有人遇到过这个问题哈！mysql 的binlog 是二进制日志？

Question

mysql-binlog是MySQL数据库的二进制日志，用于记录用户对数据库操作的SQL语句（(除了数据查询语句）信息。可以使用mysqlbin命令查看二进制日志的内容
二机制的日志看不懂吧

Answer 1

mysqlbinlog功能是将MySQL的binlog日志转换成MySQL文本SQL语句，默认情况下binlog日志是二进制文件.用file命令查看文件类型$filemysql-bin.002149mysql-bin.002149:MySQLreplicationlog直接用xxd命令查看（二进制）$xxd-l1024mysql-bin.00214900000000:fe62696e562a5f5d0f01000000770000.binV*_].....w..00000010:007b00000000000400352e372e32372d.{.......5.7.27-00000020:307562756e7475302e31362e30342e310ubuntu0.16.04.100000030:2d6c6f67000000000000000000000000-log............00000040:00000000000000000000000000000013................转换日志成文本的sql看一下$mysqlbinlog--no-defaults/var/lib/mysql/mysql-bin.002149>~/test.sql$head~/test.sql输出/*!50530SET@@SESSION.PSEUDO_SLAVE_MODE=1*/;/*!50003SET@OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;DELIMITER/*!*/;#at4#1908227:51:43serverid1end_log_pos123CRC320x6c47a911Start:binlogv4,serverv5.7.27-0ubuntu0.16.04.1-logcreated1908227:51:43BINLOG'D9ldXQ8BAAAAdwAAAHsAAAAAAAQANS43LjI3LTB1YnVudHUwLjE2LjA0LjEtbG9nAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAAXwAEGggAAAAICAgCAAAACgoKKioAEjQAARGpR2w='/*!*/;输出虽然大部分是文本，但因为采用的mixed模式，也有类似BINLOG类似的指令，这部分是无法转成sql语句的。也就无法查看了。对这段神秘的BINLOG解析一下：echo"D9ldXQ8BAAAAdwAAAHsAAAAAAAQANS43LjI3LTB1YnVudHUwLjE2LjA0LjEtbG9nAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAAXwAEGggAAAAICAgCAAAACgoKKioAEjQAARGpR2w="|base64-d|xxd将会输出：00000000:0fd95d5d0f01000000770000007b0000..]].....w...{..00000010:0000000400352e372e32372d30756275.....5.7.27-0ubu00000020:6e7475302e31362e30342e312d6c6f67ntu0.16.04.1-log00000030:00000000000000000000000000000000................00000040:000000000000000000000013380d0008............8...00000050:001200040404041200005f00041a0800.........._.....00000060:0000080808020000000a0a0a2a2a0012............**..00000070:34000111a9476c4....Gl和前面那段似曾相识。mysqlbinlog加–base64-output=DECODE-ROWS-v参数可以把BINLOG部分转化成可读的注释掉的SQL,但不是所有的都能成功转化。