Install memcached daemon / Install memcached extension using pecl

August 22, 2013 Servers, Tutorials

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A little about Memcached

Memcached is a service that allows you to store in memory key-value data like strings or objects, from results like databases queries, API calls and drastically accelerating queries and reducing the load on your server. Memcached is being used by major websites like Youtube, Twitter, Digg, WordPress.com and many many more. In this artile we’re going to see how we can install Memcached on a server running CentOS.

To install Memcached, there are a few steps that you need to do, see bellow:

Installing Memcached (Daemon)

First we need some packages installed for Memcached to work on our server.

yum install libevent libevent-devel

1	yum install libevent libevent-devel

We download the latest (currently 1.4.10) version of memcached and untar it to our server:

cd /usr/local/src
wget http://memcached.googlecode.com/files/memcached-1.4.10.tar.gz
tar -xzf memcached-1.4.6.tar.gz
cd memcached-1.4.6

cd /usr/local/src

wget http://memcached.googlecode.com/files/memcached-1.4.10.tar.gz

tar -xzf memcached-1.4.6.tar.gz

cd memcached-1.4.6

Then we start configuring memcached, compile it and install it.

./configure
make
make install

./configure

make

make install

Preparing system to run with Memcached on startup.

touch /etc/init.d/memcached
echo '#!/bin/sh -e' >> /etc/init.d/memcached
echo '/usr/local/bin/memcached -d -m 128 -p 11211 -u nobody -l localhost' >> /etc/init.d/memcached
chmod u+x /etc/init.d/memcached
echo '/etc/init.d/memcached' >> /etc/rc.local

touch /etc/init.d/memcached

echo '#!/bin/sh -e' >> /etc/init.d/memcached

echo '/usr/local/bin/memcached -d -m 128 -p 11211 -u nobody -l localhost' >> /etc/init.d/memcached

chmod u+x /etc/init.d/memcached

echo '/etc/init.d/memcached' >> /etc/rc.local

And finanly we will start memcached daemon

/etc/init.d/memcached start

1	/etc/init.d/memcached start

PECL Memcache Module Installation:

Next step is to install the php module for using memcached directly from php. We can do this easily using PECL.

pecl install memcache

1	pecl install memcache

Next in the folder /etc/php.d/ we create a file memcache.ini in which file we add the bellow content:

; /etc/php.d/memcache.ini

extension = memcache.so

memcache.allow_failover = 1
memcache.max_failover_attempts = 20
memcache.chunk_size = 32768
memcache.default_port = 11211
memcache.hash_strategy = standard
memcache.hash_function = crc32