Tag: Memcached

How to use memcached with php

Using this tutorial you will know, How to use memcached with php. We given code for using memcache with php. we shown you to configure memcache with php.

How to use memcached with php

 

How to use memcached with php
How to use memcached with php

If you try to install memcached with Linux server then use following commands

# yum install libevent
# yum install libmemcached libmemcached-devel
# yum install memcached

For Starting the memcached server
# memcached -d -m 512 -l 127.0.0.1 -p 11211 -u nobody

11211 port is default port for memcached server.

For using the memecached with php client you need to install following package

# pecl install memcache

After installing all packages restart the apache server.

# /etc/sbin/service httpd restart

<!--?php
/* OO API */
$memcache_obj = new Memcache;
$memcache_obj--->connect('memcache_host', 11211);
$memcache_obj->set('any_key', 'some value', MEMCACHE_COMPRESSED, 50);
echo $memcache_obj->get('any_key');
?>

Important Note: Memcached key has limitations of 250 charactors, So key value should be with in 250 charactors.

install php and memcached server on centos5

In this article I given full step by step installation guide about php and memcached . Check full article for install php and memcached server on centos5.

install php and memcached server on centos5

What is Memcached?

Free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.

install php and memcached server on centos5
install php and memcached server on centos5

Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from results of database calls, API calls, or page rendering.

Please use following commands for installtion;
[root@ip-192-168-2-125 wordpressapi]# wget http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-2.noarch.rpm

[root@ip-192-168-2-125 wordpressapi]# yum remove php-common

[root@ip-192-168-2-125 wordpressapi]# yum install php-pdo php-mcrypt squirrelmail php-pecl-apc php-xml php-gd php-devel php php-imap php-pgsql php-pear php-soap php-mbstring php-ldap php-mysql php-cli php-pecl-memcache

[root@ip-192-168-2-125 wordpressapi]# /etc/init.d/memcached restart
Shutting down Distributed memory caching (memcached): [ OK ]
Starting Distributed memory caching (memcached): [ OK ]

[root@ip-192-168-2-125 wordpressapi]# /etc/init.d/httpd restart
Stopping httpd: [ OK ]
Starting httpd: [ OK ]

[root@ip-192-168-2-125 wordpressapi]# vim /etc/php.ini
In php.ini file Please find the “extension=modulename.extension” words
Under that sentance please paste following line:
extension=memcache.so
Note: dont comments that line.

[root@ip-192-168-2-125 wordpressapi]# /etc/init.d/httpd restart
Stopping httpd: [ OK ]
Starting httpd: [ OK ]
[root@ip-192-168-2-125 wordpressapi]#

How we configure memcached on fedora with machine restart

In this tutorial we will show you how configure memcached on fedora with machine restart, First install the memcached on server- linux box.

What is Memcahced?

Memcached is free and open-source software, licensed under the Revised BSD license.[2] Memcached runs on Unix-like operating systems (at least Linux and OS X) and on Microsoft Windows. It depends on the libevent library.

configure memcached on fedora

# yum install php-pdo php-mcrypt squirrelmail php-pecl-apc php-xml php-gd php-devel php php-imap php-pgsql php-pear php-soap php-mbstring php-ldap php-mysql php-cli php-pecl-memcache

Using this file you can change the cache and memory size.

[root@kapilk-pc kapil]# vim /etc/rc.d/init.d/memcached

Aslo change the following file also. Do same setting in this file

# /etc/sysconfig/memcached

[root@kapilk-pc kapil]# /etc/init.d/memcached restart
Stopping memcached: [ OK ]
Starting memcached: [ OK ]

Following command will set command as wheneven machine reboots, memcached server will restart.

[root@kapilk-pc kapil]# /sbin/chkconfig memcached on

Memcached Server with Rails

To install memcached server on linux/fedora box
yum install memcached

Find help for memcached commands and option
memcached -help

Start memcached server(11211 is default port Number for memcached server)
memcached -m 500 -l 192.168.2.4 -p 11211 -vv
(192.168.2.4 this is my local ip address you can cahnge that)

Stop the Memcached server
ps -ef|grep memcached
kill PROCESS_ID

start memcached server with
memcached -m 500 -l 192.168.2.4 -p 11211 -vv

How to install on Windows server:
1.  Downloaded this Win32 port of memcached by Kenneth Dalgleish.(download from following url)
http://thewebfellas.com/blog/2008/6/9/rails-2-1-now-with-better-integrated-caching
2. Extracted the files to C:\Program Files\memcached
3. Opened a command prompt in the folder and installed memcached as a service using memcached -d install
4. Started the service using net start “memcached Server”

How to use memcache in Rails app?
Open  /config/environments/development.rb for development mode,
production.rb for production mode.
paste following line into file.
config.cache_store = :mem_cache_store, ‘127.0.0.1’, ‘127.0.0.1:11211’ , { :namespace => ‘dev’ }
(127.0.0.1 this is my local ip address you can cahnge or point out to any server where memcached server is running)
Restart mongrel server. you are ready to use memcached server

How to use in Rails
@user= User.find(1)—–OLD Code

New Code With Caching:
@user = cache([‘User’,1],:expires_in => 30.minutes) do
User.find(1)
end