原文链接：?http://blog.csdn.net/songxixi/article/details/8737555 现在公司向在一台服务器上做主从复制，现在了解到的是需要安装多个mysql不同的服务，才可以，我现在 在现有单实例数据库下，分了不同的端口以下所示红色部分；[root@mysql ~]# netstat -t

原文链接：?http://blog.csdn.net/songxixi/article/details/8737555

现在公司向在一台服务器上做主从复制，现在了解到的是需要安装多个mysql不同的服务，才可以，我现在 在现有单实例数据库下，分了不同的端口以下所示红色部分；
[root@mysql ~]# netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name 
tcp 0 0 0.0.0.0:1001 0.0.0.0:* LISTEN 2515/rpc.statd 
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 2483/portmap 
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 2750/cupsd 
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 3056/sendmail: acce 
tcp 0 0 :::3306 :::* LISTEN 4025/mysqld 
tcp 0 0 :::3307 :::* LISTEN 17423/mysqld 
tcp 0 0 :::3308 :::* LISTEN 17388/mysqld 
tcp 0 0 :::3309 :::* LISTEN 20371/mysqld 
tcp 0 0 :::22 :::* LISTEN 2741/sshd 
udp 0 0 0.0.0.0:995 0.0.0.0:* 2515/rpc.statd 
udp 0 0 0.0.0.0:998 0.0.0.0:* 2515/rpc.statd 
udp 0 0 0.0.0.0:42601 0.0.0.0:* 3204/avahi-daemon: 
udp 0 0 0.0.0.0:5353 0.0.0.0:* 3204/avahi-daemon: 
udp 0 0 0.0.0.0:111 0.0.0.0:* 2483/portmap 
udp 0 0 0.0.0.0:631 0.0.0.0:* 2750/cupsd 
udp 0 0 :::5353 :::* 3204/avahi-daemon: 
udp 0 0 :::59254 :::* 3204/avahi-daemon: 
[root@mysql mysql]# mysqld_multi --defaults-extra-file=/etc/mysqld_multi.cnf report
Reporting MySQL servers
MySQL server from group: mysqld2 is running
MySQL server from group: mysqld3 is running
MySQL server from group: mysqld4 is running
[root@mysql mysql]# lsof -i:3308
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
mysqld 17388 mysql 11u IPv6 45429 TCP *:tns-server (LISTEN)
[root@mysql mysql]# lsof -i:3307
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
mysqld 17423 mysql 11u IPv6 45479 TCP *psession-prxy (LISTEN)
[root@mysql mysql]# lsof -i:3309
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
mysqld 20371 mysql 11u IPv6 47851 TCP *:tns-adv (LISTEN)
[root@mysql mysql]# lsof -i:3306
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
mysqld 4025 mysql 11u IPv6 16575 TCP *:mysql (LISTEN)
[root@mysql mysql]#
[root@mysql ~]# 
在以上服务都启动正常的情况下，配置主从，我没有调整IO的线程，不知道在不同端口见做主从复制关系，以下是我配置最后遇到的错误，请绿林好汉帮忙看看啊，拍砖。。
mysql> show slave status\G;
*************************** 1. row ***************************
 Slave_IO_State: 
 Master_Host: 192.168.1.10
 Master_User: slave001
 Master_Port: 3308
 Connect_Retry: 60
 Master_Log_File: mysql-bin.000003
 Read_Master_Log_Pos: 1027
 Relay_Log_File: localhost3308-relay-bin.000001
 Relay_Log_Pos: 4
 Relay_Master_Log_File: mysql-bin.000003
 Slave_IO_Running: No
 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: 1027
 Relay_Log_Space: 107
 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
Master_SSL_Verify_Server_Cert: No
 Last_IO_Errno: 1593
 Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids; these ids must be different for replication to work (or the --replicate-same-server-id option must be used on slave but this does not always make sense; please check the manual before using it).
 Last_SQL_Errno: 0
 Last_SQL_Error: 
 Replicate_Ignore_Server_Ids: 
 Master_Server_Id: 1
1 row in set (0.00 sec)
ERROR: 
No query specified
mysql>
我在mysqld_multi.cnf里面添加了以下红色的，复制内容启动还是报错，请指点哇
[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin
user = multi_admin
password = my_password
[mysqld2]
socket = /tmp/mysql3307.sock
port = 3307
pid-file = /usr/local/mysql/data3307/localhost3307.pid
datadir = /usr/local/mysql/data3307
#language = /usr/local/mysql/share/mysql/english
user = mysql
[mysqld3]
#mysqld = /path/to/mysqld_safe
#ledir = /path/to/mysqld-binary/
#mysqladmin = /path/to/mysqladmin
socket = /tmp/mysql3308.sock
port = 3308
pid-file = /usr/local/mysql/data3308/localhost3308.pid
datadir = /usr/local/mysql/data3308
#language = /usr/local/mysql/share/mysql/swedish
user = mysql
master-host = 192.168.1.10
master-user = slave001
master-password = slave001
master-port = 3306
replicate-do-db=test
错误：
mysql> show slave status\G;
*************************** 1. row ***************************
 Slave_IO_State: 
 Master_Host: 192.168.1.10
 Master_User: slave001
 Master_Port: 3306
 Connect_Retry: 60
 Master_Log_File: mysql-bin.000018
 Read_Master_Log_Pos: 107
 Relay_Log_File: localhost3308-relay-bin.000001
 Relay_Log_Pos: 4
 Relay_Master_Log_File: mysql-bin.000018
 Slave_IO_Running: No
 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: 107
 Relay_Log_Space: 107
 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
Master_SSL_Verify_Server_Cert: No
 Last_IO_Errno: 1593
 Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids; these ids must be different for replication to work (or the --replicate-same-server-id option must be used on slave but this does not always make sense; please check the manual before using it).
 Last_SQL_Errno: 0
 Last_SQL_Error: 
 Replicate_Ignore_Server_Ids: 
 Master_Server_Id: 1
1 row in set (0.00 sec)

哎，经过几个小时的琢磨，终于看到庐山真面目了！以下是成功启动的效果；
[root@mysql ~]# mysqld_multi --defaults-extra-file=/etc/my.cnf report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is running
MySQL server from group: mysqld3 is running
MySQL server from group: mysqld4 is running
[root@mysql ~]# mysqld_multi --defaults-extra-file=/etc/my.cnf report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is running
MySQL server from group: mysqld3 is running
MySQL server from group: mysqld4 is running
[root@mysql ~]# mysqld_multi --defaults-extra-file=/etc/my.cnf report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is running
MySQL server from group: mysqld3 is running
MySQL server from group: mysqld4 is running
[root@mysql ~]# mysqld_multi --defaults-extra-file=/etc/my.cnf report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is running
MySQL server from group: mysqld3 is running
MySQL server from group: mysqld4 is running
[root@mysql ~]#
其实，在我配置muti的时候有些参数没有做好设置，到时server-id服务启动不起来，我把所有的muti的mysqld【1-4】全部放到我们的配置文件内/etc/my.cnf，包括我们的3306端口的实例库，在启动的时候一起跑即可！以下是我my.cnf的配置文件信心，请查阅；
# The following options will be passed to all MySQL clients
[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin
user = root
# Here follows entries for some specific programs
# The MySQL server
[mysqld1]
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
user=mysql
old_passwords=1
port=3306
skip-name-resolve
server_id=1
log-bin=mysql-bin
max_connections=1000
key_buffer_size=218348
query_cache_size=10
read_rnd_buffer_size=134228
table_cache=10000
tmp_table_size=5362
log-slow-queries=slow.log
long_query_time=1
concurrent_insert=2
thread_cache_size=300
#log=/usr/local/mysql/data/mysql1.log
pid-file=/usr/local/mysql/data/mysql1.pid
log-error=/usr/local/mysql/data/log.1
log-slave-updates
slave-skip-errors=ALL
[mysqld2]
datadir=/usr/local/mysql/data3307
socket=/tmp/mysql3307.sock
user=mysql
old_passwords=1
skip-name-resolve
server_id=222
log-bin=mysql-bin
max_connections=1000
key_buffer_size=218348
query_cache_type=0
read_rnd_buffer_size=1342128
table_cache=10000
tmp_table_size=53612
log-slow-queries=slow.log
long_query_time=1
concurrent_insert=2
thread_cache_size=300
port=3307
pid-file=/usr/local/mysql/data3307/localhost3307.pid
log-error=/usr/local/mysql/data3307/log.2
[mysqld3]
datadir=/usr/local/mysql/data3308
socket=/tmp/mysql3308.sock
user=mysql
old_passwords=1
skip-name-resolve
server_id=223
log-bin=mysql-bin
max_connections=1000
key_buffer_size=218348
query_cache_type=0
read_rnd_buffer_size=1342128
table_cache=10000
tmp_table_size=53612
log-slow-queries=slow.log
long_query_time=1
concurrent_insert=2
thread_cache_size=300
port=3308
pid-file=/usr/local/mysql/data3308/localhost3308.pid
log-error=/usr/local/mysql/data3308/log.3
[mysqld4]
datadir=/usr/local/mysql/data3309
socket=/tmp/mysql3309.sock
user=mysql
old_passwords=1
skip-name-resolve
server_id=224
log-bin=mysql-bin
max_connections=1000
key_buffer_size=218348
query_cache_type=0
read_rnd_buffer_size=1342128
table_cache=10000
tmp_table_size=53612
log-slow-queries=slow.log
long_query_time=1
concurrent_insert=2
thread_cache_size=300
port=3309
pid-file=/usr/local/mysql/data3309/localhost3309.pid
log-error=/usr/local/mysql/data3309/log.4
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