mysql 5.1支持触发器以及自定义函数接口(UDF)的特性,如果配合libmemcache以及Memcached Functions for MySQL,就能够实现memcache的自动更新。简单记录一下安装测试步骤。 安装memcached,这个步骤很简单,随处可见 安装mysql server 5.1RC,安装办法也很大众,不废话了 编译libmemcached,解压后安装即可./configure; make; make install 编译Memcached Functions for MySQL,在找一个最新的版本就是,./configure --with-mysql=/usr/local/mysql/bin/mysql_config --libdir=/usr/local/mysql/lib/mysql/ make make install 接下来有两个办法让Memcached Functions for MySQL在mysql中生效 在mysql的shell中执行memcached_functions_mysql目录下的sql/install_functions.sql,这会把memcache function作为UDF加入mysql 运行memcached_functions_mysql源码目录下的utils/install.pl,这是一个perl脚本,作用同上一条 测试memcache function 以下测试脚本摘自memcached_functions_mysql的源码目录,有兴趣可以试试 create table urls ( id int(3) not null, url varchar(64) not null default , primary key (id) ); select memc_set(urls:sequence, 0); CREATE TRIGGER url_mem_insert BEFORE INSERT ON urls FOR EACH ROW BEGIN SET NEW.id= memc_increment(urls:sequence); SET @mm= memc_set(concat(urls:,NEW.id), NEW.url); END | insert into urls (url) values (http://www.ooso.net/index.); insert into urls (url) values (http://www.devdao.net/); insert into urls (url) values (http://slashdot.org); insert into urls (url) values (http://.com); select * from urls; select memc_get(urls:2); select memc_get(urls:3); select memc_get(urls:4); select memc_get(urls:5);
安装步骤
PLAIN TEXTCODE: drop table if exists urls;
select memc_servers_set(localhost:11211);
DELIMITER |
DROP TRIGGER IF EXISTS url_mem_insert;
DELIMITER ;
insert into urls (url) values (http://google.com);
select memc_get(urls:1);