How To Install memcached with memcache PHP Extension on CentOS 5.x !

[admin]

In this how to i will describe how to install memcached on your server with PHP Extension. memcached is a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load. My server is running CentOS 5.3 with CPanel.
1) Install memcached.

Enable rpmforge respository to install latest memcached rpm using yum.
For i386 / i686

rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/...l5.rf.i386.rpm

For x86_64

rpm -Uhv http://apt.sw.be/redhat/el5/en/x86_6....rf.x86_64.rpm

Use yum to install memcached

yum -y install memcached

As soon as memcached installation completed, edit options for memcached in /etc/sysconfig/memcached to meet your need.

vi /etc/sysconfig/memcached

PORT=”11211″ #define on which port to urn
USER=”nobody” #same as apache user
MAXCONN=”1024″ #maximum number of connections allowed
CACHESIZE=”64″ #memory used for caching
OPTIONS=”" #use for any custom options

Save the file. All options can be seen by using following command

memcached -h

Start memcached

/etc/init.d/memcached start
Starting Distributed memory caching (memcached): [ OK ]

to check the running status of memcached

/etc/init.d/memcached status
memcached (pid 6475) is running…

and

netstat -anp | grep 11211
tcp 0 0 :::11211 :::* LISTEN 6475/memcached
udp 0 0 0.0.0.0:11211 0.0.0.0:* 6475/memcached

2) Install PHP Extension.
Download and install latest stable memcache version from PECL.

cd /usr/src
wget http://pecl.php.net/get/memcache-2.2.5.tgz
tar zxvf memcache-2.2.5.tgz
cd memcache-2.2.5
phpize
./configure
make
make install

memcache.so will be install in php modules directory, now enable memcache.so extension in php.ini

To find out your php.ini location, execute following command

php -i | grep php.ini
Configuration File (php.ini) Path => /usr/local/lib
Loaded Configuration File => /usr/local/lib/php.ini

vi /usr/local/lib/php.ini

extension = “memcache.so”

save the file and restart httpd server.

/etc/init.d/httpd restart

To check is memcache extension loaded in php, execute following command.

php -i | grep memcache
memcache
memcache support => enabled
memcache.allow_failover => 1 => 1
memcache.chunk_size => 8192 => 8192
memcache.default_port => 11211 => 11211
memcache.default_timeout_ms => 1000 => 1000
memcache.hash_function => crc32 => crc32
memcache.hash_strategy => standard => standard
memcache.max_failover_attempts => 20 => 20
Registered save handlers => files user sqlite memcache
PWD => /usr/src/memcache-2.2.5
_SERVER["PWD"] => /usr/src/memcache-2.2.5
_ENV["PWD"] => /usr/src/memcache-2.2.5

This information can also be seen using phpinfo().
Mô Tả: Tăng Năng Xử lý cho các ứng dụng .

[vô danh]

Lỗi

perl-AnyEvent-5.240-1.el5.rf.noarch from rpmforge has depsolving problems
--> Missing Dependency: perl(Net::SSLeay) >= 1.33 is needed by package perl-AnyEvent-5.240-1.el5.rf.noarch (rpmforge)
Error: Missing Dependency: perl(Net::SSLeay) >= 1.33 is needed by package perl-AnyEvent-5.240-1.el5.rf.noarch (rpmforge)

Fix

yum -y remove perl-IO-Socket-SSL perl-Net-SSLeay

wget http://packages.sw.be/perl-Net-SSLea...rfx.x86_64.rpm
wget http://packages.sw.be/perl-IO-Socket...rfx.noarch.rpm

rpm -i perl-Net-SSLeay-1.36-1.el5.rfx.x86_64.rpm
rpm -i perl-IO-Socket-SSL-1.34-1.el5.rfx.noarch.rpm

yum -y install memcached

[vô danh]

Cập nhật cách đang dùng được

Đầu tiên chúng ta cần install libevent thư viện cần cho memcache, bằng câu lệnh yum

yum install libevent libevent-devel

tải source về

cd /usr/local/src

wget http://memcached.googlecode.com/files/memcached-1.4.15.tar.gz

giải nén nó

tar -xvzf  memcached-1.4.15.tar.gz

cd memcached-1.4.15

./configure

Lưu ý : nếu dùng OS 64bit có thể enable để tăng mức hỗ trợ ram ,dùng mutil theard cpu thì có thể enable

./configure --enable-theards --enable-64bit

ok giờ install

make && make install

sau đó start memcache

memcached -d -u nobody -m 512 -p 11211 127.0.0.1

Câu lệnh start memcache có thể tùy chỉnh theo các biến

memcached -d -u [user] -m [memory size] -p [port][listen ip]

-d
Tell memcached to start up as a backgrounded daemon process
-u
Specify the user that you want to run memcached
-m
Set the memory that you want to be allocated my memcached
-p
The port on which memcached will listen.


Sau đó ta còn phải cài memcached cho php

cd /usr/src
wget http://pecl.php.net/get/memcache-2.2.5.tgz
tar zxvf memcache-2.2.5.tgz
cd memcache-2.2.5
phpize
./configure
make
make install

khi đó tiến trình sẽ tạo ra 1 file memcache.so ,điều ta cần làm là enable nó lên php.ini

Để tìm nơi php đặt php.ini ta dùng lệnh sau

php -i | grep php.ini
Configuration File (php.ini) Path => /usr/local/lib
Loaded Configuration File => /usr/local/lib/php.ini

mở file ra hiệu chỉnh

vi /usr/local/lib/php.ini

thêm
extension_dir = "/usr/local/lib/php/extensions/no-debug-non-zts-20060613/"
extension = “memcache.so”

lưu và save lại sau đó restart để cập nhật


/etc/init.d/httpd restart

kiểm tra đã cài đặt thành công hay chưa

php -i | grep memcache
memcache
memcache support => enabled
memcache.allow_failover => 1 => 1
memcache.chunk_size => 8192 => 8192
memcache.default_port => 11211 => 11211
memcache.default_timeout_ms => 1000 => 1000
memcache.hash_function => crc32 => crc32
memcache.hash_strategy => standard => standard
memcache.max_failover_attempts => 20 => 20
Registered save handlers => files user sqlite memcache
PWD => /usr/src/memcache-2.2.5
_SERVER["PWD"] => /usr/src/memcache-2.2.5
_ENV["PWD"] => /usr/src/memcache-2.2.5

[vô danh]

auto start memcached
tạo file shellscript memcached

nano /etc/init.d/memcached

trong đó code như dưới

#!/bin/sh
# chkconfig: - 80 12
# description: The memcached daemon is a network memory cache service.
# processname: memcached
BIN=/usr/local/bin/memcached
USER=nobody
CON=2048
THREADS=4

$BIN -d -m 16 -p 11211 -c $CON -t $THREADS -u $USER
$BIN -d -m 16 -p 11212 -c $CON -t $THREADS -u $USER

case "$1" in
start)
$BIN -d -m 16 -p 11211 -c $CON -t $THREADS -u $USER
$BIN -d -m 16 -p 11212 -c $CON -t $THREADS -u $USER
;;
stop) killall $BIN
;;
esac

phân quyền cho file script

chmod 755 /etc/init.d/memcached

add memcached vào chkconfig

chkconfig --level 345 memcached on


check hoạt động

ps -e | grep memcached