教你使用MySQL触发器自动更新memcache

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原贴:http://www.devdao.com/Article/440369.htm  
  
**教你使用MySQL触发器自动更新memcache**  
  
文章类别：[MySQL教程][MySQL] | 发表日期：2008-8-18  
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安装步骤

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[http://download.tangent.org/][http_download.tangent.org]找一个最新的版本下载就是，./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源码目录下的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

PLAIN TEXTCODE: drop table if exists urls;

create table urls (

id int(3) not null,

url varchar(64) not null default '',

primary key (id)

);

select memc\_servers\_set('localhost:11211');

select memc\_set('urls:sequence', 0);

DELIMITER |

DROP TRIGGER IF EXISTS url\_mem\_insert;

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 |

DELIMITER ;

insert into urls (url) values ('http://google.com');

insert into urls (url) values ('http://www.ooso.net/index.php');

insert into urls (url) values ('http://www.devdao.net/');

insert into urls (url) values ('http://slashdot.org');

insert into urls (url) values ('http://mysql.com');

select \* from urls;

select memc\_get('urls:1');

select memc\_get('urls:2');

select memc\_get('urls:3');

select memc\_get('urls:4');

select memc\_get('urls:5');

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[http_download.tangent.org]: http://download.tangent.org/