centos 下memcached 构建以及php memcache安装

centos 下memcached 构建以及php memcache安装

memcached 与memcache的区别，请google

一、构建memcached 服务器（memcached服务端程序的安装）

1)memcached用到了libevent这个库,用于Socket的处理

wget http://www.monkey.org/~provos/libevent-2.0.10-stable.tar.gz
tar xzvf libevent-2.0.10-stable.tar.gz
cd libevent-2.0.10-stable
./configure --prefix=/usr
make && make install

验证libevent是否正确安装

ls -al /usr/lib |grep libevent

[root@test /]# ls -al /usr/lib |grep libevent
lrwxrwxrwx   1 root root      21 Feb 28 19:27 libevent-2.0.so.5 -> libevent-2.0.so.5.0.1
-rwxr-xr-x   1 root root  943520 Feb 28 19:27 libevent-2.0.so.5.0.1
-rw-r--r--   1 root root 1532202 Feb 28 19:27 libevent.a
lrwxrwxrwx   1 root root      26 Feb 28 19:27 libevent_core-2.0.so.5 -> libevent_core-2.0.so.5.0.1
-rwxr-xr-x   1 root root  554374 Feb 28 19:27 libevent_core-2.0.so.5.0.1
-rw-r--r--   1 root root  928010 Feb 28 19:27 libevent_core.a
-rwxr-xr-x   1 root root     971 Feb 28 19:27 libevent_core.la
lrwxrwxrwx   1 root root      26 Feb 28 19:27 libevent_core.so -> libevent_core-2.0.so.5.0.1
lrwxrwxrwx   1 root root      27 Feb 28 19:27 libevent_extra-2.0.so.5 -> libevent_extra-2.0.so.5.0.1
-rwxr-xr-x   1 root root  410763 Feb 28 19:27 libevent_extra-2.0.so.5.0.1
-rw-r--r--   1 root root  604266 Feb 28 19:27 libevent_extra.a
-rwxr-xr-x   1 root root     978 Feb 28 19:27 libevent_extra.la
lrwxrwxrwx   1 root root      27 Feb 28 19:27 libevent_extra.so -> libevent_extra-2.0.so.5.0.1
-rwxr-xr-x   1 root root     936 Feb 28 19:27 libevent.la
lrwxrwxrwx   1 root root      29 Feb 28 19:27 libevent_openssl-2.0.so.5 -> libevent_openssl-2.0.so.5.0.1
-rwxr-xr-x   1 root root   85731 Feb 28 19:27 libevent_openssl-2.0.so.5.0.1
-rw-r--r--   1 root root  120996 Feb 28 19:27 libevent_openssl.a
-rwxr-xr-x   1 root root    1007 Feb 28 19:27 libevent_openssl.la
lrwxrwxrwx   1 root root      29 Feb 28 19:27 libevent_openssl.so -> libevent_openssl-2.0.so.5.0.1
lrwxrwxrwx   1 root root      30 Feb 28 19:27 libevent_pthreads-2.0.so.5 -> libevent_pthreads-2.0.so.5.0.1
-rwxr-xr-x   1 root root   18094 Feb 28 19:27 libevent_pthreads-2.0.so.5.0.1
-rw-r--r--   1 root root   18678 Feb 28 19:27 libevent_pthreads.a
-rwxr-xr-x   1 root root     999 Feb 28 19:27 libevent_pthreads.la
lrwxrwxrwx   1 root root      30 Feb 28 19:27 libevent_pthreads.so -> libevent_pthreads-2.0.so.5.0.1
lrwxrwxrwx   1 root root      21 Feb 28 19:27 libevent.so -> libevent-2.0.so.5.0.1

 2)安装memcached

wget http://memcached.googlecode.com/files/memcached-1.4.5.tar.gz
tar xzvf memcached-1.4.5.tar.gz
cd memcached-1.4.5
./configure -–with-libevent=/usr
make && make install

 安装完成后,程序会将memcached 自动放到 /usr/local/bin/memcached

[root@test /]# which memcached
/usr/local/bin/memcached

 3)安装PHP的memcache扩展

memcache 的项目下载地址

http://pecl.php.net/package/memcache

 安装code

wget http://pecl.php.net/get/memcache-3.0.5.tgz
tar xf memcache-3.0.5.tgz
cd memcache-3.0.5
./configure --enable-memcache --with-php-config=/usr/local/php/bin/php-config --with-zlib-dir
make && make install

安装完成后，提示

Installing shared extensions:     /usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/

配置php.ini文件

修改extension_dir:

extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/"

添加一行以便加载memcache扩展：extension=memcache.so

extension=memcache.so

验证PHP中是否成功加载memcache扩展

[root@test /]# php -m
[PHP Modules]
Core
ctype
curl
date
dom
eAccelerator
ereg
fileinfo
filter
hash
iconv
json
libxml
mcrypt
memcache
mysql
mysqli
pcre
PDO
pdo_sqlite
Phar
posix
Reflection
session
SimpleXML
SPL
SQLite
sqlite3
standard
tokenizer
xml
xmlreader
xmlwriter
zlib

[Zend Modules]
eAccelerator

17行处，有memcahe,正确加载

后续：memcached基本配置

启动memcached 服务端程序：

memcached -d -m 10 -u root -l localhost -p 11211 -c 256 -P /tmp/memcached.pid

各个参数的含义：

-d选项是启动一个守护进程，
-m是分配给Memcached使用的内存数量，单位是MB,
-u是运行Memcache的用户，我这里是root，
-l是监听的服务器IP地址,
-p是设置Memcache监听的端口，最好是1024以上的端口，
-c选项是最大运行的并发连接数，默认是1024,按照你服务器的负载量来设定，
-P是设置保存Memcache的pid文件

PS:memcached 常用方法：

kill `cat /tmp/memcached.pid`

获取运行状态

echo stats | nc 192.168.0.122 11200
watch “echo stats | nc 192.168.0.122 11200 ” (实时状态)

快速清空

echo “flush_all” | nc 192.168.0.122 11200

其他工具
http://code.sixapart.com/svn/memcached/trunk/server/scripts/memcached-tool