MySQL的主从复制步骤详解及常见错误解决方法

log-bin   = /opt/log.bin/45
server-id  = 45

mysql> grant REPLICATION SLAVE ON *.* TO 'repl'@'10.1.1.43' IDENTIFIED BY 'replpass';

root@10.1.1.45:mysql# sed -n '1,40p' all.sql 
-- MySQL dump 10.11
--
-- Host: localhost Database: 
-- ------------------------------------------------------
-- Server version 5.0.51a-24+lenny1-log
 
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
 
--
-- Position to start replication or point-in-time recovery from
--
 
CHANGE MASTER TO MASTER_LOG_FILE='45.000064', MASTER_LOG_POS=98;
 
--
-- Current Database: `bbs`
--
 
CREATE DATABASE /*!32312 IF NOT EXISTS*/ `bbs` /*!40100 DEFAULT CHARACTER SET latin1 */;
 
USE `bbs`;
 
--
-- Table structure for table `davehe`
--
 
DROP TABLE IF EXISTS `davehe`;
SET @saved_cs_client  = @@character_set_client;
SET character_set_client = utf8;
CREATE TABLE `davehe` (

server-id = 43 #主从可1对多 从各id不能相同

root@10.1.1.43:tmp# cat all.sql | mysql -uroot -p

mysql> change master to master_host='10.1.1.45', master_user='repl',master_password='replpass',master_log_file='45.000064',master_log_pos=98;
Query OK, 0 rows affected (0.01 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
 
 
mysql> show slave status\G;
*************************** 1. row ***************************
    Slave_IO_State: Waiting for master to send event
    Master_Host: 10.1.1.45
    Master_User: repl
    Master_Port: 3306
    Connect_Retry: 60
   Master_Log_File: 45.000064
  Read_Master_Log_Pos: 98
    Relay_Log_File: mysqld-relay-bin.000002
    Relay_Log_Pos: 228
  Relay_Master_Log_File: 45.000064
   Slave_IO_Running: Yes
   Slave_SQL_Running: Yes
   Replicate_Do_DB: 
  Replicate_Ignore_DB: 
   Replicate_Do_Table: 
  Replicate_Ignore_Table: 
 Replicate_Wild_Do_Table: 
Replicate_Wild_Ignore_Table: 
     Last_Errno: 0
     Last_Error: 
    Skip_Counter: 0
  Exec_Master_Log_Pos: 98
   Relay_Log_Space: 228
   Until_Condition: None
    Until_Log_File: 
    Until_Log_Pos: 0
   Master_SSL_Allowed: No
   Master_SSL_CA_File: 
   Master_SSL_CA_Path: 
   Master_SSL_Cert: 
   Master_SSL_Cipher: 
    Master_SSL_Key: 
  Seconds_Behind_Master: 0
1 row in set (0.00 sec)
 
 
ERROR: 
No query specified

stop slave;
set GLOBAL SQL_SLAVE_SKIP_COUNTER=1; (事务类型,可能需要执行几次)
start slave;

stop slave IO_THREAD //此线程把master段的日志写到本地
start slave IO_THREAD
stop slave SQL_THREAD //此线程把写到本地的日志应用于数据库
start slave SQL_THREAD

root@192.168.71.1:~# mysql -uroot -p --socket=/opt/mysql/3399/3399.sock 
Enter password: 
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 452723
Server version: 5.0.51a-24+lenny2 (Debian)
 
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
 
mysql> show slave status\G;
*************************** 1. row ***************************
    Slave_IO_State: 
    Master_Host: 192.168.1.1
    Master_User: repl
    Master_Port: 3306
    Connect_Retry: 60
   Master_Log_File: 99.000302
  Read_Master_Log_Pos: 165112917
    Relay_Log_File: 3399-relay-bin.000013
    Relay_Log_Pos: 165113047
  Relay_Master_Log_File: 99.000302
   Slave_IO_Running: No
   Slave_SQL_Running: Yes
   Replicate_Do_DB: 
  Replicate_Ignore_DB: mysql
   Replicate_Do_Table: 
  Replicate_Ignore_Table: 
 Replicate_Wild_Do_Table: 
Replicate_Wild_Ignore_Table: 
     Last_Errno: 0
     Last_Error: 
    Skip_Counter: 0
  Exec_Master_Log_Pos: 165112917
   Relay_Log_Space: 165113047
   Until_Condition: None
    Until_Log_File: 
    Until_Log_Pos: 0
   Master_SSL_Allowed: No
   Master_SSL_CA_File: 
   Master_SSL_CA_Path: 
   Master_SSL_Cert: 
   Master_SSL_Cipher: 
    Master_SSL_Key: 
  Seconds_Behind_Master: NULL
1 row in set (0.00 sec)

mysql@192.168.71.1:/opt/mysql/3399$ cat 192.168.71.1.err
140115 1:51:01 [ERROR] Error reading packet from server: Client requested master to start replication from impossible position ( server_errno=1236)
140115 1:51:01 [ERROR] Got fatal error 1236: 'Client requested master to start replication from impossible position' from master when reading data from binary log
140115 1:51:01 [Note] Slave I/O thread exiting, read up to log '99.000302', position 165112917

root@192.168.1.1:mysql.bin# mysqlbinlog 99.000302 > /tmp/test
root@192.168.1.1:mysql# tail -n 10 /tmp/test 
#140115 0:50:25 server id 1176 end_log_pos 165111351  Query thread_id=111 exec_time=0 error_code=0
SET TIMESTAMP=1389718225/*!*/;
INSERT INTO user_info_db_86.region_info_table_56 (userid, region, gameflag) VALUES (563625686, 0, 2) ON DUPLICATE KEY UPDATE gameflag = (gameflag | 2)/*!*/;
# at 165111351
#140115 0:50:25 server id 1176 end_log_pos 165111378  Xid = 17877752
COMMIT/*!*/;
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;

CHANGE MASTER TO

 MASTER_HOST='192.168.1.1',

 MASTER_USER='repl',

 MASTER_PASSWORD='replpass',

 MASTER_PORT=3306,

 MASTER_LOG_FILE='99.000303',

 MASTER_LOG_POS=98;