Install Memcache in CentOS 5.4 (Linux + Nginx + PHP + Memcached)

I. Prepare the source code package

The server is mainly installed on the memcache server, the latest version is memcached-v1.4.4.
Download: http://memcached.googlecode.com/files/memcached-1.4.4.tar.gz
In addition, Memcache uses the libevent library for Socket processing, so you also need to install libevent,

The latest version of libevent is the libevent-1.4.13-stable. (If your system has already installed libevent, you do not need to install it)
Official Website: http://www.monkey.org /~ Provos/libevent/
Download: http://www.monkey.org /~ Provos/libevent-1.4.13-stable.tar.gz

Prepare the Memcached PHP extension source code installation package:
Official Website: http://pecl.php.net/get/memcache-2.2.5.tgz

Download Linux commands:

Copy codeThe Code is as follows: wget http://memcached.googlecode.com/files/memcached-1.4.4.tar.gz
Wget http://www.monkey.org /~ Provos/libevent-1.4.13-stable.tar.gz
Wget http://pecl.php.net/get/memcache-2.2.5.tgz

Ii. installation and configuration
1. Install libevent firstCopy codeThe Code is as follows: tar zxvf libevent-1.4.13-stable.tar.gz
Cd libevent-1.4.13-stable
./Configure -- prefix =/usr
Make
Make install

2. test whether the libevent is successfully installed.Copy codeThe Code is as follows: ls-al/usr/lib | grep libevent
Libevent-1.1a.so.1
Libevent-1.1a.so.1.0.2
Libevent-1.4.so.2
Libevent-1.4.so.2.1.3
Libevent.
Libevent_core-1.4.so.2
Libevent_core-1.4.so.2.1.3
Libevent_core.a
Libevent_core.la
Libevent_core.so
Libevent_extra-1.4.so.2
Libevent_extra-1.4.so.2.1.3
Libevent_extra.a
Libevent_extra.la
Libevent_extra.so
Libevent. la
Libevent. so

Different versions may have different file lists.

3. Install memcached and specify the libevent installation location during installation.Copy codeThe Code is as follows: tar zxvf memcached-1.4.4.tar.gz
Cd memcached-1.4.4
./Configure-with-libevent =/usr
Make & make install

After the installation is complete, memcached will be automatically put to/usr/local/bin/memcached

4. Test whether memcached is successfully installed.Copy codeThe Code is as follows: ls-al/usr/local/bin/mem *
-Rwxr-xr-x 1 root 201869 12-14/usr/local/bin/memcached

5. install PHP extension for Memcache

① Install the memcache extension of PHPCopy codeThe Code is as follows: tar vxzf memcache-2.2.5.tgz
Cd memcache-2.2.5
/Usr/local/webserver/php/bin/phpize
./Configure -- enable-memcache -- with-php-config =/usr/local/php/bin/php-config -- with-zlib-dir
Make
Make install

② After the above installation, a message similar to this will be displayed:

Installing shared extensions:/usr/local/webserver/php/lib/php/extensions/no-debug-non-zts-20060613/

③ Modify extension_dir = "./" in php. iniCopy codeCode: extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-2007xxxx /"

④ Add a row to load the memcache extension: extension = memcache. so

III. Basic settings of memcached
1. Start the Memcache Server:Copy codeThe Code is as follows: memcached-d-m 10-u root-l 202.207.177.177-p 11211-c 256-P/tmp/memcached. pid

Parameter description:

-D option is to start a daemon,
-M indicates the amount of memory allocated to Memcache. The unit is MB. Here I am 10 MB,
-U is the user who runs Memcache. Here I am root,
-L is the IP address of the listener server. If there are multiple IP addresses, I have specified the Server IP address 202.207.177.177,
-P is the port for Memcache listening. I have set port 11211 here, preferably port 1024 or above,
-The "c" option is the maximum number of concurrent connections. The default value is 1024. I have set 256 here, which is based on the load of your server,
-P is the pid file for saving Memcache. Here I save it in/tmp/memcached. pid,

2. to end the Memcache process, run:

Copy codeThe Code is as follows: kill 'cat/tmp/memcached. Pi'

You can also start multiple daemon processes, but the ports cannot be repeated.

3. Check whether Memcached is enabled.Copy codeThe Code is as follows: netstat-ant
Tcp 0 0 202.207.177.177: 11211 0.0.0.0: * LIST

Port 11211 is enabled, indicating that Memcached has started properly.

4. Restart CentOSCopy codeThe Code is as follows: reboot

Iv. Test the Memcache Environment
Run the following PHP file. If This is a test! is output !, Indicates that the environment is successfully set up. Start your journey to Memcache!Copy codeThe Code is as follows: <? Php
$ Mem = new Memcache;
$ Mem-& gt; connect ("202.207.177.177", 11211 );
$ Mem-> set ('key', 'This is a test! ', 0, 60 );
$ Val = $ mem-> get ('key ');
Echo $ val;
?>

The famous PHPCMS also supports Memcached extension:Copy codeThe Code is as follows: <? Php
// MemCache Server Configuration
// Define ('memcache _ host', 'localhost'); // MEMCACHE server HOST
// Define ('memcache _ port', 11211); // MEMCACHE server PORT
// Define ('memcache _ timeout', 1); // S, MEMCACHE server connection TIMEOUT
Class cache
{
Var $ memcache;
Function _ construct ()
{
$ This-> memcache = & new Memcache;
$ This-> memcache-> pconnect (MEMCACHE_HOST, MEMCACHE_PORT, MEMCACHE_TIMEOUT );
}
Function cache ()
{
$ This->__ construct ();
}
Function get ($ name)
{
Return $ this-> memcache-> get ($ name );
}
Function set ($ name, $ value, $ ttl = 0)
{
Return $ this-> memcache-> set ($ name, $ value, 0, $ ttl );
}
Function rm ($ name)
{
Return $ this-> memcache-> delete ($ name );
}
Function clear ()
{
Return $ this-> memcache-> flush ();
}
}
?>

V. References
If you have any questions about Memcached, refer to the following articles:
Install Memcache in Linux: http://www.ccvita.com/257.html
Nginx 0.8.x + PHP 5.2.10 (FastCGI) build a Web server that is 10 times better than Apache: http://blog.s135.com/nginx_php_v5/