一、必備軟件：
1、LUA
2、MySQL Proxy
3、測試過程中取消了B和C的REPLICATION。這樣SQL語句一下子就看出來從哪裡來的。
如果是M-S（可以先在SLAVE上進行STOP SLAVE）
二、測試主機地址：
1、MySQL Proxy 安裝地址：192.168.0.234(簡稱A)
2、MySQL 服務器地址：192.168.0.235(簡稱B)/236(簡稱C)
三、安裝體驗
如果是按照二進制包安裝的，跳過這一步。
1、 LUA的安裝
[root@localhost ~]#tar zxvf lua-5.1.2.tar.gz -C /usr/local
[root@localhost ~]# cd /usr/local/
[root@localhost local]# mv lua-5.1 lua
[root@localhost lua]# cd lua
[root@localhost lua]#make local;make install;
導出環境變量：
[root@localhost lua]#export LUA_CFLAGS="-I/usr/local/include" LUA_LIBS="-L/usr/local/lib -llua -ldl" LDFLAGS="-lm"
2、MySQL Proxy 安裝
[root@localhost ~]#tar -zxvf mysql-proxy-0.6.1-linux-rhel4-x86-32bit.tar.gz -C /usr/local/mysql/
[root@localhost ~]#cd /usr/local/mysql
[root@localhost mysql]#mv mysql-proxy-0.6.1-linux-rhel4-x86-32bit/ mysql-proxy
[root@localhost sbin]# export PATH=$PATH:/usr/local/mysql/mysql-proxy/sbin/
四、使用MySQL Proxy
1、查看幫助選項
[root@localhost ~]# mysql-proxy --help-all
2、對MySQL 操作
MySQL服務器假設已經安裝。(安裝步驟這裡就不寫了)
兩台機器上的表初始結構和數據都是一樣的，而且都有t_girl_user這個用戶。
mysql> desc t;
+-------+----------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+----------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| c_str | char(64) | NO | | | |
+-------+----------+------+-----+---------+----------------+
2 rows in set (0.00 sec)
2 rows in set (0.00 sec)
我在B上插入一條記錄
mysql> insert into t(c_str) values('B');
Query OK, 1 row affected (0.00 sec)
在C上同樣插入一條記錄
mysql> insert into t(c_str) value('C');
Query OK, 1 row affected (0.00 sec)
mysql>
3、啟動MySQL-Proxy（測試讀寫分離）
[root@localhostsbin]# mysql-proxy--proxy-read-only-backend-addresses=192.168.0.236:3306--proxy-backend-addresses=192.168.0.235:3306 --proxy-lua-script=/usr/local/mysql/mysql-proxy/share/mysql-proxy/rw-splitting.lua&
[1] 32554
讓MYSQL PROXY自動啟動的簡單腳本
#!/bin/sh
# export PATH=$PATH:/usr/local/mysql-proxy
cd /usr/local/mysql-proxy
./mysql-proxy--proxy-read-only-backend-addresses=192.168.0.236:3306--proxy-backend-addresses=192.168.0.235:3306--proxy-lua-script=rw-splitting.lua >> /tmp/log
~
這個例子中限制192.168.0.236為只讀,192.168.0.235為可寫。
4、下來我們來看試驗結果。
我們用幾台客戶端開啟4個連接。
[root@localhost ~]# /usr/local/mysql/bin/mysql -ut_girl_user -p123456 -P4040 -h192.168.0.234 -Dt_girl
我這邊已經啟動了好幾個客戶端，這裡就不貼了，命令和上面的一樣。
寫數據。
mysql> insert into t(c_str) values ('wangwang');
Query OK, 1 row affected (0.01 sec)
mysql> show processlist;
+----+-------------+---------------------+--------+---------+------+-------+------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+-------------+---------------------+--------+---------+------+-------+------------------+
| 12 | t_girl_user | 192.168.0.234:44975 | t_girl | Sleep | 28 | | NULL |
| 13 | t_girl_user | 192.168.0.234:44976 | t_girl | Sleep | 15 | | NULL |
| 14 | t_girl_user | 192.168.0.234:44977 | t_girl | Sleep | 19 | | NULL |
| 15 | t_girl_user | 192.168.0.234:44978 | t_girl | Query | 0 | NULL | show processlist |
+----+-------------+---------------------+--------+---------+------+-------+------------------+
4 rows in set (0.00 sec)
4 rows in set (0.00 sec)
讀數據（現在還是寫和讀都在B上）
mysql> select * from t;
+----+----------+
| id | c_str |
+----+----------+
| 1 | B |
| 2 | wangwang |
+----+----------+
2 rows in set (0.00 sec)
再增加一個客戶端連接。
1 row in set (0.00 sec)
mysql> show processlist;
+----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+
|Id | User | Host | db | Command | Time |State |Info |
+----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+
| 2 | system user | | NULL | Connect | 1842 | Hasread all relay log; waiting for the slave I/O thread to update it |NULL |
| 5 | root | localhost |t_girl | Query | 0 |NULL |show processlist |
| 12 | t_girl_user | 192.168.0.234:44975 |t_girl | Sleep | 446| | NULL |
| 13 | t_girl_user | 192.168.0.234:44976 |t_girl | Sleep | 188| | NULL |
| 14 | t_girl_user | 192.168.0.234:44977 |t_girl | Sleep | 206| | NULL |
| 15 | t_girl_user | 192.168.0.234:44978 |t_girl | Sleep | 203| | NULL |
| 16 | t_girl_user | 192.168.0.234:44979 |t_girl | Sleep | 164| | NULL |
| 17 | t_girl_user | 192.168.0.234:44980 |t_girl | Sleep | 210| | NULL |
+----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+
8 rows in set (0.00 sec)
現在我們來讀數據。
mysql> select * from t;
+----+-------+
| id | c_str |
+----+-------+
| 1 | C |
+----+-------+
1 row in set (0.00 sec)
這個數據很明顯是來自C的。
再插入一條記錄
mysql> insert into t(c_str) values ('wangwei');
Query OK, 1 row affected (0.00 sec)
mysql> select * from t;
+----+-------+
| id | c_str |
+----+-------+
| 1 | C |
+----+-------+
1 row in set (0.00 sec)
C上的數據沒有變。
還是沒有數據。
現在跑到B上看看。
mysql> show processlist;
+----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+
|Id | User | Host | db | Command | Time |State |Info |
+----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+
| 2 | system user | | NULL | Connect | 1842 | Hasread all relay log; waiting for the slave I/O thread to update it |NULL |
| 5 | root | localhost | t_girl | Query | 0 |NULL |show processlist |
|12 | t_girl_user | 192.168.0.234:44975 | t_girl | Sleep | 446| | NULL |
|13 | t_girl_user | 192.168.0.234:44976 | t_girl | Sleep | 188| | NULL |
|14 | t_girl_user | 192.168.0.234:44977 | t_girl | Sleep | 206| | NULL |
|15 | t_girl_user | 192.168.0.234:44978 | t_girl | Sleep | 203| | NULL |
|16 | t_girl_user | 192.168.0.234:44979 | t_girl | Sleep | 164| | NULL |
|17 | t_girl_user | 192.168.0.234:44980 | t_girl | Sleep | 210| | NULL |
+----+-------------+---------------------+--------+---------+------+-----------------------------------------------------------------------+------------------+
8 rows in set (0.00 sec)
mysql> select * from t;
+----+----------+
| id | c_str |
+----+----------+
| 1 | B |
| 2 | wangwang |
| 3 | wangwei |
+----+----------+
3 rows in set (0.00 sec)
數據被成功插入到B
這個讀寫分離應該看得很清楚。其他的功能等我測試了再總結吧。
