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2025-04-02 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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Editor to share with you how to use MySQL triggers to update memcache automatically. I hope you will get something after reading this article. Let's discuss it together.
Mysql 5.1supports the features of trigger and custom function interface (UDF). If you cooperate with libmemcache and Memcached Functions for MySQL, you can automatically update memcache. Briefly record the installation test steps.
Installation steps
To install memcached, this step is simple and can be seen everywhere.
Install mysql server 5.1RC, the installation method is also very popular, cut the crap
Compile libmemcached, decompress it and install it. / configure; make; make install
Compiling Memcached Functions for MySQL, looking for the latest version is. / configure-- with-mysql=/usr/local/mysql/bin/mysql_config-- libdir=/usr/local/mysql/lib/mysql/
Make
Make install
Next, there are two ways to make Memcached Functions for MySQL effective in mysql
Execute sql/install_functions.sql under the memcached_functions_mysql directory in the shell of mysql, which will add memcache function to mysql as UDF
Run utils/install.pl under the memcached_functions_mysql source directory, which is a perl script that works the same as the previous line
Test memcache function
The following test script is extracted from the source directory of memcached_functions_mysql. If you are interested, you can try it.
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.);
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:1)
Select memc_get (urls:2)
Select memc_get (urls:3)
Select memc_get (urls:4)
Select memc_get (urls:5)
After reading this article, I believe you have a certain understanding of "how to use MySQL triggers to update memcache automatically". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!
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