mysql 5.1支持觸發器以及自定義函數接口(UDF)的特性,如果配合libmemcache以及Memcached Functions for MySQL,就能夠實現memcache的自動更新。簡單記錄一下安裝測試步驟。
安裝步驟
安裝memcached,這個步驟很簡單,隨處可見
安裝mySQL Server 5.1RC,安裝辦法也很大眾,不廢話了
編譯libmemcached,解壓後安裝即可./configure; make; make install
編譯Memcached Functions for MySQL,在http://download.tangent.org/找一個最新的版本下載就是,./configure --with-mysql=/usr/local/mysql/bin/mysql_config --libdir=/usr/local/mysql/lib/MySQL/
make
make install
接下來有兩個辦法讓Memcached Functions for MySQL在MySQL中生效
在mysql的shell中執行memcached_functions_mysql源碼目錄下的sql/install_functions.sql,這會把memcache function作為UDF加入MySQL
運行memcached_functions_MySQL源碼目錄下的utils/install.pl,這是一個perl腳本,作用同上一條
測試memcache function
以下測試腳本摘自memcached_functions_MySQL的源碼目錄,有興趣可以試試
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');