CentOS 7部署memcached缓存服务器

Posted 2020-10-27

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1.简介

1.1Memcached

Memcached是一款开源的、高性能的纯内存缓存服务软件。

mysql数据库属于磁盘上的数据库，数据的读写较慢；而Memcached数据库属于内存中的数据库，读写速度快，但数据容易丢失。Memcached天生不支持分布式集群，只能通过程序支持分布式存储。使用Memcached数据库，提高用户访问网站速度，降低MySQL数据库服务器压力，提高网站的并发访问，因此工作中，MySQL+Memcached搭配使用。

1.2Memcached工作过程

技术分享图片

2.系统环境准备

[[email protected] ~]# cat /etc/re

redhat-release resolv.conf

[[email protected] ~]# cat /etc/re

redhat-release resolv.conf

[[email protected] ~]# cat /etc/redhat-release

CentOS Linux release 7.2.1511 (Core)

[[email protected] ~]# uname -r

3.10.0-327.el7.x86_64

[[email protected] ~]# getenforce

Disabled

[[email protected] ~]# systemctl status firewalld.service

● firewalld.service - firewalld - dynamic firewall daemon

Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)

Active: inactive (dead)

[[email protected] ~]# ifconfig

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

inet 10.0.0.21 netmask 255.255.255.0 broadcast 10.0.0.255

inet6 fe80::20c:29ff:fee1:ad7 prefixlen 64 scopeid 0x20<link>

ether 00:0c:29:e1:0a:d7 txqueuelen 1000 (Ethernet)

RX packets 3228 bytes 815585 (796.4 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 419 bytes 52728 (51.4 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

inet 172.16.1.21 netmask 255.255.255.0 broadcast 172.16.1.255

inet6 fe80::20c:29ff:fee1:ae1 prefixlen 64 scopeid 0x20<link>

ether 00:0c:29:e1:0a:e1 txqueuelen 1000 (Ethernet)

RX packets 0 bytes 0 (0.0 B)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 23 bytes 1698 (1.6 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536

inet 127.0.0.1 netmask 255.0.0.0

inet6 ::1 prefixlen 128 scopeid 0x10<host>

loop txqueuelen 0 (Local Loopback)

RX packets 0 bytes 0 (0.0 B)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 0 bytes 0 (0.0 B)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

3.服务端部署Memcached服务

3.1安装memcached

[[email protected] ~]# yum install -y memcached

3.2启动memcached服务

[[email protected] ~]# systemctl start memcached.service

3.3测试

[[email protected] ~]# printf "set fengfyu 0 0 5\r\n12345\r\n"|nc 10.0.0.21 11211 ---写入数据

STORED

[[email protected] ~]# printf "get fengfyu 0 0 5\r\n12345\r\n"|nc 10.0.0.21 11211 ---读取数据

VALUE fengfyu 0 5

12345

END

ERROR

4.web服务器客户端部署memcached

4.1编译安装memcached

[[email protected] tools]# tar xf memcache-2.2.5.tgz

[[email protected] tools]# cd memcache-2.2.5/

[[email protected] memcache-2.2.5]# /application/php/bin/ph

[[email protected] memcache-2.2.5]# /application/php/bin/phpize

Configuring for:

PHP Api Version: 20121113

Zend Module Api No: 20121212

Zend Extension Api No: 220121212

[[email protected] memcache-2.2.5]# ./configure --enable-memcache --with-php-config=/application/php/bin/php-config --with-zlib-dir && make && make install

4.2使php与memcached关联

sed -i '$a extension=memcache.so' /application/php/lib/php.ini

4.3启动php

/application/php/sbin/php-fpm

4.4客户端测试

[[email protected] www]# cat /application/nginx/html/www/mc.php

<?php

$memcache = new Memcache;

$memcache->connect('10.0.0.21', 11211) or die ("Could not connect");

$memcache->set('fengyu', 'hello,world');

$get_value = $memcache->get('fengyu');

echo $get_value;