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教你使用MySQL触发器自动更新memcache

2008-08-19 06:50:51  编辑来源:互联网  宽屏版  评论

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.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');

 
 
 
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[url=http://download.tangent.org/]http://download.tangent.org/[/url]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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