Installing memcached under CentOS

Installing memcached under CentOS is simple, as long as you use the CentOS-built dependency management tool, but you can also install it using a compiled method.

1. Service-side memcached

Below I will use Yum to install memcached:

[root@localhost ~]# yum install memcached

Select Y

Very simple! The installation is complete!

Let's start memcached!

[root@localhost ~]# /usr/bin/memcached -d -l 127.0.0.1 -p 11211 -m 150 -u root

-D: Daemon. Memcached will continue to run when exiting from the terminal window
-L: Specify the IP address, where we specify the local IP
-P: Specify port number, port number is 11211
-M: allocating memory, where I allocate 150M of memory
-u: Which user to use to run memcached

So how do we see if our memcached is up and down?
A command is described below:

[root@localhost ~]# ps -ef | grep memcached

The PS command is the abbreviation for precess status, which is the list of processes that are running on the current system
Ps-ef is the display of all processes, along with the command line
PS is typically used in combination with grep to find a specific process

2. Client Memcache

2.1 Installing Libmemcached
2.1.1 Download libmemcached

[root@localhost ~]# wget https://launchpad.net/libmemcached/1.0/1.0.18/+download/libmemcached-1.0.18.tar.gz

2.1.2 Download memcached

[root@localhost ~]# wget http://pecl.php.net/get/memcached-2.2.0.tgz

Attention! Here is the PHP extension, do not download memcached, after the completion of the decompression can be seen in the folder whether there are php_ such files.

2.1.3 Decompression libmemcached

[root@localhost ~]# tar -zxvf libmemcached-1.0.8.tar.gz

Here is the compiled installation method:
Go to the libmemcached-1.0.8 directory and compile

[root@localhost ~]# ./configure --prefix=/usr/lib/libmemcached

Specify to compile into the/usr/lib/libmemcached directory

To install

[root@localhost libmemcached-1.0.8]# make && make install

Wait for a period of time after installation is complete!

2.2 Installing memcached extensions for PHP
2.2.1 Decompression memcached

[root@localhost ~]# tar -zxvf memcached-2.2.0.tar.gz

Enter this folder to perform

[root@localhost ~]# cd memcached-2.2.0[root@localhost memcached-2.2.0]# phpize

It's going to be a configure file.
Perform:

[root@localhost memcached-2.2.0]# ./configure

Will error: Configure:error:Cannot find Php-config. Please Use–with-php-config=path
It means you didn't find me. Php-config this path
So we're going to specify our path, which depends on where your PHP is installed.

My php-config is under the/usr/local/php/bin.
Go to the Memcached folder to re-execute:

[root@localhost memcached-2.2.0]# ./configure --with-php-config=/usr/local/php/bin/php-config

Damn, it's an error.
Configure:error:memcached support requires libmemcached. Use–with-libmemcached-dir=dir to specify the prefix where libmemcached headers and library is located
It turns out that we have not found the libmemcached extension we just installed.
Because we just./configure–prefix=/usr/bin/lib/libmemcached
So our libmemcached extension is here.
Re-execution:

[[email protected] memcached-2.2.0]# ./configure --with-php-config=/usr/local/php/bin/php-config --with-libmemcached-dir=/usr/lib/libmemcached

Nima!! Also error: Error:no, Sasl.h is not available. Run Configure WITH–DISABLE-MEMCACHED-SASL to disable this check
According to the guidelines, re-execute:

[[email protected] memcached-2.2.0]# ./configure --with-php-config=/usr/local/php/bin/php-config --with-libmemcached-dir=/usr/lib/libmemcached --disable-memcached-sasl

Finally success!
2.2.2 Installing extensions

[root@localhost memcached-2.2.0]# make && make install

The following will be php.ini configuration, add memcached extension

[root@localhost ~]# vim /usr/local/php/etc/php.ini

Press Shift+g to jump to the last line
Insert: extension=memcached.so Save
To restart my lnmp: [[email protected] ~]# lnmp restart
To view my PHP extensions: [[email protected] ~]# php -m
To see if there are memcached extensions: [[email protected] ~]# php -m | grep memcached

Now PHP has successfully configured the memcached!

Installing memcached under CentOS