MySQL的源码安装及使用UDFs进行数据自动更新的教
编程学习 2021-07-05 14:36www.dzhlxh.cn编程入门
UDFs即是MySQL的用户自定义函数的缩写,配合触发器可以自动更新Memcached与MySql的数据,这里我们就来总结一下MySQL的源码安装及使用UDFs进行数据自动更新的教程:
MySQL的源码安装
1. 安装依赖组件
# yum install gcc gcc-c++ ncurses-devel perl -y
2. 安装cmake
# wget http://www.cmake.org/files/v2.8/cmake-2.8.12.tar.gz # tar zxvf cmake-2.8.12.tar.gz # cd cmake-2.8.12 # ./bootstrap # make && make install
3. 安装bison
# wget http://ftp.gnu.org/gnu/bison/bison-3.0.2.tar.gz # tar zxvf bison-3.0.2.tar.gz # cd bison-3.0.2 # ./configure # make && make install
4. 创建用户的相应目录
# groupadd mysql # useradd -g mysql mysql # mkdir -p /data/mysql/ # mkdir -p /data/mysql/data/ # mkdir -p /data/mysql/log/
5. 获取mysql安装包并安装
# wget http://downloads.mysql.com/archives/mysql-5.5/mysql-5.5.24.tar.gz # tar zxvf mysql-5.5.24.tar.gz # cd mysql-5.5.24 # cmake \ -DCMAKE_INSTALL_PREFIX=/data/mysql \ -DMYSQL_UNIX_ADDR=/data/mysql/mysql.sock \ -DDEFAULT_CHARSET=utf8 \ -DDEFAULT_COLLATION=utf8_general_ci \ -DWITH_INNOBASE_STORAGE_ENGINE=1 \ -DWITH_ARCHIVE_STORAGE_ENGINE=1 \ -DWITH_BLACKHOLE_STORAGE_ENGINE=1 \ -DMYSQL_DATADIR=/data/mysql/data \ -DMYSQL_TCP_PORT=3306 \ -DENABLE_DOWNLOADS=1 # make && make install
6. 修改目录权限
# chmod +w /data/mysql/ # chown -R mysql:mysql /data/mysql/ # ln -s /data/mysql/lib/libmysqlclient.so.18 /usr/lib/libmysqlclient.so.18 # ln -s /data/mysql/mysql.sock /tmp/mysql.sock
7. 初始化数据库
# cp -rp /data/mysql/support-files/my-medium.cnf /etc/my.cnf # cp -rp /data/mysql/support-files/mysql.server /etc/rc.d/init.d/mysqld # /data/mysql/scripts/mysql_install_db --user=mysql --defaults-file=/etc/my.cnf --basedir=/data/mysql --datadir=/data/mysql/data
8. 启动mysql服务
# chmod +x /etc/init.d/mysqld # vi /etc/init.d/mysqld --> basedir=/data/mysql datadir=/data/mysql/data # chkconfig --add mysqld # service mysqld start
9. 完成配置
# /data/mysql/bin/mysqladmin -uroot -p password 'PASSWD' # echo "export PATH=/data/mysql/bin:$PATH" >> ~/.bash_profile # source ~/.bash_profile
UDFs实现Memcached与Mysql的自动更新
UDFs是User Defined Functions的缩写，表示MYSQL的用户定义函数，应用程序可以利用这些函数从MYSQL5.0以上版本的数据库中访问Memcached写入或者获取的数据。此外，MYSQL从5.1版本开始支持触发器，从而可以在触发器中使用UDFs直接更新Memcached的内容，这种方式降低了应用程序设计和编写的复杂性。
1.安装
wget https://launchpad.net/libmemcached/1.0/0.34/+download/libmemcached-0.34.tar.gz yum install gcc44 gcc44-c++ libstdc++44-devel export CC=/usr/bin/gcc44 export CXX=/usr/bin/g++44 ./configure --prefix=/soft/libmemcached -disable-64bit CFLAGS="-O3 -march=i686" \ --with-memcached=/root/libmemcached-1.0.7/memcached make && make install
wget https://launchpad.net/memcached-udfs/trunk/1.1/+download/memcached_functions_mysql-1.1.tar.gz ./configure --prefix=/soft/UDFS/memcache_mysql \ --with-mysql=/soft/mysql/bin/mysql_config \ --libdir=/soft/mysql/lib/plugin \ --with-libmemcached=/soft/UDFS/libmemcached
make && make install mysql -uroot -pmysql < /sql/install_functions.sql mysql -uroot -pmysql -se "select name,dl from mysql.func"
select memc_servers_set('127.0.0.1:11211');//如果mysql restart，需要重新运行这句以建立与memcached之间的关系
select memc_server_count();
select memc_set('urls:sequence', 0);
select memc_list_behaviors()\G//修改memcached参数的行为
select memc_servers_behavior_set('MEMCACHED_BEHAVIOR_NO_BLOCK','1');
select
memc_servers_behavior_set('MEMCACHED_BEHAVIOR_TCP_NODELAY','1');
设置MEMCACHED_BEHAVIOR_NO_BLOCK为打开状态，这样在memcached出现问题时（不能连接时）数据继续插入到
mysql中，报错提示，如果不设置此值，如果memcached失败，mysql需要等到timeout才可以插入到表中。
2.测试：
drop table if exists urls;
create table urls (
id int(3) not null auto_increment,
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(NEW.id, NEW.url);
END |
DROP TRIGGER IF EXISTS url_mem_update |
CREATE TRIGGER url_mem_update
BEFORE UPDATE ON urls
FOR EACH ROW BEGIN
SET @mm= memc_replace(OLD.id, NEW.url);
END |
DROP TRIGGER IF EXISTS url_mem_delete |
CREATE TRIGGER url_mem_delete
BEFORE DELETE ON urls
FOR EACH ROW BEGIN
SET @mm= memc_delete(OLD.id);
END |
DELIMITER ;
insert into urls (url) value ('http://google.com');
insert into urls (url) value ('http://lycos.com/');
insert into urls (url) value ('http://tripod.com/');
insert into urls (url) value ('http://microsoft.com/');
insert into urls (url) value('http://slashdot.org');
insert into urls (url) value ('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');
select memc_get('urls:6');
update urls set url= 'http://mysql.com/sun' where url = 'http://mysql.com';
select url from urls where url = 'http://mysql.com/sun';
select memc_get('urls:6');
delete from urls where url = 'http://microsoft.com/';
select * from urls where url='http://microsoft.com/';
select memc_get('urls:4');