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Mysql 5.5 replication多数据库主从备份Master-Slave配置总结(一)

2014-11-24 13:50:35 · 作者: · 浏览: 2
标签: Mysql 5.5 replication 数据库 主从 备份 Master-Slave 配置 总结
Mysql 5.5 replication多 数据库主从备份Master-Slave配置总结
配置Mysql server 5.5 的双机备份，也就是master-slave模式。本例子还是一个多database复制的情况。
现在有两个database在同一台 mysql server，也就是master，各自有自己的user访问和操作，用于不同的应用程序。这两个database都要通过replication配置，实时复制到另一台mysql server上，也就是slave。
配置步骤：
1. 从master上到处现有的数据 
mysqldump -R -E -uroot -p ADB > masteradb.sql;
mysqldump -R -E -uroot -p BDB > masterbdb.sql;

2. 为master和slave定制配置文件/etc/my.cnf，然后启动mysql
vi /etc/my.cnf
###详细内容见附录
service mysql restart
3. 在slave上创建database.
create database ADB;
create database BDB;
4. 在master和slave上配置user和privilege; 
GRANT ALL PRIVILEGES ON ADB.* TO usera@`%` IDENTIFIED BY 'pass' WITH GRANT OPTION;
GRANT ALL PRIVILEGES ON ADB.* TO usera@`localhost` IDENTIFIED BY 'pass' WITH GRANT OPTION;
GRANT ALL PRIVILEGES ON BDB.* TO userb@`%` IDENTIFIED BY 'pass' WITH GRANT OPTION;
GRANT ALL PRIVILEGES ON BDB.* TO userb@`localhost` IDENTIFIED BY 'pass' WITH GRANT OPTION;
flush privileges;

5. 在master上配置用于数据复制的user和privilege; 
grant SUPER ON *.* TO 'auser'@'%' IDENTIFIED BY 'pass' WITH GRANT OPTION;
grant SUPER ON *.* TO 'buser'@'%' IDENTIFIED BY 'pass' WITH GRANT OPTION;
GRANT SELECT ON mysql.proc TO 'auser'@'%' IDENTIFIED BY 'pass' WITH GRANT OPTION;
GRANT SELECT ON mysql.proc TO 'buser'@'%' IDENTIFIED BY 'pass' WITH GRANT OPTION;
GRANT REPLICATION SLAVE ON *.* TO repluser IDENTIFIED BY 'pass';
flush privileges;

6. 在master上运行下列命令，得到master的状态，包含binlog的文件名和当前位置 
mysql> show master status;
+------------------+----------+--------------------------------+------------------+
| File             | Position | Binlog_Do_DB                   | Binlog_Ignore_DB |
+------------------+----------+--------------------------------+------------------+
| mysql-bin.000001 |   000173| ADB,BDB |                  |
+------------------+----------+--------------------------------+------------------+
1 row in set (0.02 sec)

7. 在slave配置复制来源，包括hostname，user，password，binlog文件名，位置。 
CHANGE MASTER TO MASTER_HOST='10.224.106.225', MASTER_USER='repluser', MASTER_PASSWORD='pass', master_log_file='mysql-bin.000001', master_log_pos=173;
start slave;

8. 运行下列命令查看slave的当前状态。
show slave status\G
结果出现
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
表示数据同步复制已经成功运行。
提示：如果show slave status\G 出现了错误，运行下列命令跳过，在重启slave 
SET GLOBAL SQL_SLAVE_SKIP_COUNTER =100;start slave;
show slave status\G;
stop slave;
SET GLOBAL SQL_SLAVE_SKIP_COUNTER =0;start slave;

附录：
master my.cnf配置 
[plain] 
[client]  
port            = 3306  
socket          = /var/lib/mysql/mysql.sock  
  
  
[mysqld]  
port            = 3306  
socket          = /var/lib/mysql/mysql.sock  
skip-external-locking  
key_buffer = 384M  
max_allowed_packet = 32M  
table_open_cache = 5120  
key_buffer_size = 64M  
sort_buffer_size = 512M  
net_buffer_length = 8K  
read_buffer_size = 16M  
read_rnd_buffer_size = 128M  
myisam_sort_buffer_size = 128M  
  
query_cache_size = 256M  
tmp_table_size = 128M  
max_heap_table_size = 128M  
thread_concurrency = 8  
max_connections=500  
group_concat_max_len=1048576  
  
max_sp_recursion_depth=255  
  
  
slow_query_log_file=/spare/mysql/slow_queries.log  
long_query_time = 5  
  
  
  
binlog_cache_size = 2M  
join_buffer_siz