Tag: caching

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]#

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