https://jackxiang.com/index.php zh-cn https://jackxiang.com/post// jack <xdy108@126.com> Thu, 07 Jan 2010 04:10:17 +0000 https://jackxiang.com/post//
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/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.ooso.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');

继续参看：
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