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Question about balance in R/W Splitting
Posted by: vox huang
Date: September 04, 2007 10:05PM

Hello,I start mysql-proxy like this,

LUA_PATH="/usr/local/tools/mysql-proxy/trunk/lib/?.lua" /usr/local/sbin/mysql-proxy --proxy-backend-addresses=192.168.0.7:3306 --proxy-read-only-backend-addresses=192.168.0.6:3306 --proxy-lua-script=/usr/local/tools/mysql-proxy/trunk/lib/rw-splitting.lua

I have different data sets on both servers,with the same database name,the same table name and structure, only the data differs.

Master:
mysql> SELECT * from test;
+----+----------+----------+-----+-----+
| id | username | password | sex | age |
+----+----------+----------+-----+-----+
| 1 | abc | bbb | 1 | 0 |
| 3 | abc | 123 | 1 | 0 |
| 4 | abc | bbb | 1 | 0 |
| 5 | 你 | 123 | 1 | 1 |
| 6 | aaaa | bbbb | 0 | 0 |
| 8 | ins | ins | 1 | 1 |
+----+----------+----------+-----+-----+
6 rows in set (0.00 sec)

slaver:
mysql> select * from t_user;
+----+----------+----------+-----+-----+
| id | username | password | sex | age |
+----+----------+----------+-----+-----+
| 1 | abc | bbb | 1 | 0 |
| 3 | abc | 123 | 1 | 0 |
| 4 | abc | bbb | 1 | 0 |
| 5 | 你 | 123 | 1 | 1 |
+----+----------+----------+-----+-----+
4 rows in set (0.00 sec)

then I connect mysql-proxy from 6 clients like this,

mysql -h 192.168.0.7 -P4040

client #1:
mysql> SELECT * from test;
+----+----------+----------+-----+-----+
| id | username | password | sex | age |
+----+----------+----------+-----+-----+
| 1 | abc | bbb | 1 | 0 |
| 3 | abc | 123 | 1 | 0 |
| 4 | abc | bbb | 1 | 0 |
| 5 | 你 | 123 | 1 | 1 |
| 6 | aaaa | bbbb | 0 | 0 |
| 8 | ins | ins | 1 | 1 |
+----+----------+----------+-----+-----+
6 rows in set (0.00 sec)

the results of the other 5 clients are same like this,
mysql> select * from t_user;
+----+----------+----------+-----+-----+
| id | username | password | sex | age |
+----+----------+----------+-----+-----+
| 1 | abc | bbb | 1 | 0 |
| 3 | abc | 123 | 1 | 0 |
| 4 | abc | bbb | 1 | 0 |
| 5 | 你 | 123 | 1 | 1 |
+----+----------+----------+-----+-----+
4 rows in set (0.00 sec)

So it seems that the proxy won't connect each client to each server in a round-robin fashion.

How to make it run in a round-robin fashion

Thanks for your help

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Question about balance in R/W Splitting
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