MySQL to Redis

简介

使用mysql2redis可以非常便捷的将mysql中的数据导出到redis中去, 通常是需要一个select语句即可实现。

软件安装

// 安装apr + apr-util$ wget http://mirror.bit.edu.cn/apache//apr/apr-1.5.1.tar.gz$ tar zxvf apr-1.5.1.tar.gz$ ./configure --prefix=/usr/local/apr$ make$ make install$ wget http://mirror.bit.edu.cn/apache//apr/apr-util-1.5.4.tar.gz$ cd apr-util-1.5.4$ ./configure --with-apr=/usr/local/apr$ make$ make install// 安装hiredis, redis的C语言client$ git clone https://github.com/redis/hiredis$ cd hiredis$ make$ make install$ git clone https://github.com/dawnbreaks/mysql2redis.git$ cd mysql2redis$ make$ cp lib_mysqludf_redis_v2.so /usr/lib64/mysql/plugin/

注册mysql2redis UDF

CREATE FUNCTION redis_servers_set_v2 RETURNS int SONAME "lib_mysqludf_redis_v2.so";CREATE FUNCTION redis_command_v2 RETURNS int SONAME "lib_mysqludf_redis_v2.so";CREATE FUNCTION free_resources RETURNS int SONAME "lib_mysqludf_redis_v2.so";

如果出现以下异常信息，则关闭SELINUX
ERROR 1126 (HY000): Can't open shared library 'lib_mysqludf_redis_v2.so' (errno: 2 libhiredis.so.0.12: failed to map segment from shared object: Permission denied)

关闭selinux
// 临时关闭
$ setenforce 0

//永久关闭
cat /etc/selinux/config
SELINUX=disabled

测试

// mysql// 设置redis服务器地址mysql> select redis_servers_set_v2("127.0.0.1",6379);mysql> select * from user_info;+----+------------+------+-------------------+---------+| id | NAME       | age  | email             | addr    |+----+------------+------+-------------------+---------+|  1 | Troy Zhang |   30 | [e-mail] | ChengDu |+----+------------+------+-------------------+---------+// 将user_info表的数据更新到redis中mysql> select redis_command_v2("hmset", concat("user_info:", id), 'name', name, 'age', age, 'email', email, 'addr', addr) from user_info;// redis127.0.0.1:6379> keys *1) "user_info:1"127.0.0.1:6379> hgetall user_info:11) "name"2) "Troy Zhang"3) "age"4) "\x1e\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"5) "email"6) "[e-mail]"7) "addr"8) "ChengDu"