memcached 以及 php客户端 安装

nainai1

web2.0和web1.0不一样，web1.0以内容为中心，所以web1.0做负载只需缓存内容就可以了，使用反向代理缓存页面就可以解决大部分问题了。而web2.0鼓励用户交互，内容都是动态的，只做反向代理命的话中率低，而且对数据库进行频繁的写，对数据库压力大。所以，web2.0对web1.0更需要使用内存缓存。
memcached高性能的，分布式的内存对象缓存系统，在动态应用中减少数据库负载，提升访问速度。memcached已经被广泛应用在各种软件中，例如，nginx、mysql
一、服务端安装
使用weget下载libevent和memcached
libevent: http://monkey.org/~provos/libevent-1.4.9-stable.tar.gz
memcached: http://www.danga.com/memcached/dist/memcached-1.2.6.tar.gz
1.先安装libevent





Java代码

• tar zxvf libevent-1.4.9-stable.tar.gz   
  
• cd libevent-1.4.9-stable   
  
• ./configure   
  
• make   
  
• make install  
  

tar zxvf libevent-1.4.9-stable.tar.gz cd libevent-1.4.9-stable./configuremakemake install

2.安装memcached





Java代码

• tar zxvf memcached-1.2.6.tar.gz   
  
• cd memcached-1.2.6  
  
• ./configure --enable-threads   
  
• make   
  
• make install  
  

tar zxvf memcached-1.2.6.tar.gzcd memcached-1.2.6./configure --enable-threadsmakemake install

注：如果启动时出现“memcached: error while loading shared libraries: libevent-1.4.so.2: cannot open
shared object file: No such file or directory”之类的信息，表示memcached找不到libevent的位置
所以，请先使用whereis libevent得到位置，然后连接到memcached所寻找的路径





Java代码

• [iyunv@localhost tools]# whereis libevent   
  
• libevent: /usr/local/lib/libevent.la /usr/local/lib/libevent.so /usr/local/lib/libevent.a   
  
• [iyunv@localhost tools]# LD_DEBUG=libs memcached -v 2>&1 > /dev/null | less   
  
•       3848:     find library=libevent-1.4.so.2 [0]; searching   
  
•       3848:      search cache=/etc/ld.so.cache   
  
•       3848:      search path=/lib64/tls/x86_64:/lib64/tls:/lib64/x86_64:/lib64:/   
  
• usr/lib64/tls/x86_64:/usr/lib64/tls:/usr/lib64/x86_64:/usr/lib64                  
  
• (system search path)   
  
•       3848:       trying file=/lib64/tls/x86_64/libevent-1.4.so.2  
  
•       3848:       trying file=/lib64/tls/libevent-1.4.so.2  
  
•       3848:       trying file=/lib64/x86_64/libevent-1.4.so.2  
  
•       3848:       trying file=/lib64/libevent-1.4.so.2  
  
•       3848:        
  
•       3848:     find library=libc.so.6 [0]; searching   
  
•       3848:      search cache=/etc/ld.so.cache   
  
•       3848:       trying file=/lib64/libc.so.6  
  
•       3848:        
  
•       3848:     find library=libnsl.so.1 [0]; searching   
  
•       3848:      search cache=/etc/ld.so.cache   
  
•       3848:       trying file=/lib64/libnsl.so.1  
  
•       3848:        
  
•       3848:     find library=librt.so.1 [0]; searching   
  
•       3848:      search cache=/etc/ld.so.cache   
  
•       3848:       trying file=/lib64/librt.so.1  
  
•       3848:        
  
•       3848:     find library=libresolv.so.2 [0]; searching   
  
•       3848:      search cache=/etc/ld.so.cache   
  
• [iyunv@localhost tools]# ln -s /usr/local/lib/libevent-1.4.so.2 /lib64/  
  

[iyunv@localhost tools]# whereis libeventlibevent: /usr/local/lib/libevent.la /usr/local/lib/libevent.so /usr/local/lib/libevent.a[iyunv@localhost tools]# LD_DEBUG=libs memcached -v 2>&1 > /dev/null | less      3848:     find library=libevent-1.4.so.2 [0]; searching      3848:      search cache=/etc/ld.so.cache      3848:      search path=/lib64/tls/x86_64:/lib64/tls:/lib64/x86_64:/lib64:/usr/lib64/tls/x86_64:/usr/lib64/tls:/usr/lib64/x86_64:/usr/lib64                (system search path)      3848:       trying file=/lib64/tls/x86_64/libevent-1.4.so.2      3848:       trying file=/lib64/tls/libevent-1.4.so.2      3848:       trying file=/lib64/x86_64/libevent-1.4.so.2      3848:       trying file=/lib64/libevent-1.4.so.2      3848:           3848:     find library=libc.so.6 [0]; searching      3848:      search cache=/etc/ld.so.cache      3848:       trying file=/lib64/libc.so.6      3848:           3848:     find library=libnsl.so.1 [0]; searching      3848:      search cache=/etc/ld.so.cache      3848:       trying file=/lib64/libnsl.so.1      3848:           3848:     find library=librt.so.1 [0]; searching      3848:      search cache=/etc/ld.so.cache      3848:       trying file=/lib64/librt.so.1      3848:           3848:     find library=libresolv.so.2 [0]; searching      3848:      search cache=/etc/ld.so.cache[iyunv@localhost tools]# ln -s /usr/local/lib/libevent-1.4.so.2 /lib64/

二、php安装对memcached的支持
php有两个版本的memcached客户端
1.memcached
这个是新版的客户端基于libmemcached，所以必须要安装libmemcached
先安装libmemcached
下载地址：http://download.tangent.org/libmemcached-0.26.tar.gz






Java代码

• [iyunv@localhost tools]# tar zxvf libmemcached-0.26.tar.gz   
  
• [iyunv@localhost tools]# cd libmemcached-0.26  
  
• [iyunv@localhost libmemcached-0.26]# ./configure --prefix=/usr/local/libmemcached/ --with-libmemcached-dir=/usr/local/libmemcached/   
  
• [iyunv@localhost libmemcached-0.26]# make   
  
• [iyunv@localhost libmemcached-0.26]# make install  
  

[iyunv@localhost tools]# tar zxvf libmemcached-0.26.tar.gz[iyunv@localhost tools]# cd libmemcached-0.26[iyunv@localhost libmemcached-0.26]# ./configure --prefix=/usr/local/libmemcached/ --with-libmemcached-dir=/usr/local/libmemcached/[iyunv@localhost libmemcached-0.26]# make[iyunv@localhost libmemcached-0.26]# make install

安装php memcached客户端
下载地址：http://pecl.php.net/get/memcached






Java代码

• [iyunv@localhost tools]# tar zxvf memcached-0.1.4.tgz   
  
• [iyunv@localhost tools]# cd memcached-0.1.4  
  
• [iyunv@localhost memcached-0.1.4]# ./configure --with-php-config=/usr/local/php/bin/php-config --with-libmemcached-dir=/usr/local/libmemcached/   
  
• [iyunv@localhost memcached-0.1.4]# make   
  
• [iyunv@localhost memcached-0.1.4]# make install  
  

[iyunv@localhost tools]# tar zxvf memcached-0.1.4.tgz[iyunv@localhost tools]# cd memcached-0.1.4[iyunv@localhost memcached-0.1.4]# ./configure --with-php-config=/usr/local/php/bin/php-config --with-libmemcached-dir=/usr/local/libmemcached/[iyunv@localhost memcached-0.1.4]# make[iyunv@localhost memcached-0.1.4]# make install
修改php.ini添加extension = "memcached.so"就可以了。
如果出现错误





Java代码

• checking for libmemcached location... configure: error: memcached support requires libmemcached. Use --with-libmemcached-dir=<DIR> to specify the prefix where libmemcached headers and library are located  
  

checking for libmemcached location... configure: error: memcached support requires libmemcached. Use --with-libmemcached-dir=<DIR> to specify the prefix where libmemcached headers and library are located
请先用whereis libmemcached找到路径，然后添加选项--with-libmemcached-dir=libmemcached路径
2.memcache
下载地址：http://pecl.php.net/get/memcache





Java代码

• [iyunv@localhost tools]# tar zxvf memcache-3.0.3.tgz   
  
• [iyunv@localhost tools]# cd memcache-3.0.3  
  
• [iyunv@localhost tools]# /usr/local/php/bin/phpize   
  
• [iyunv@localhost tools]# ./configure --with-php-config=/usr/local/php/bin/php-config   
  
• [iyunv@localhost tools]# make   
  
• [iyunv@localhost tools]# make install  
  

[iyunv@localhost tools]# tar zxvf memcache-3.0.3.tgz [iyunv@localhost tools]# cd memcache-3.0.3[iyunv@localhost tools]# /usr/local/php/bin/phpize[iyunv@localhost tools]# ./configure --with-php-config=/usr/local/php/bin/php-config[iyunv@localhost tools]# make[iyunv@localhost tools]# make install
修改php.ini添加extension = "memcache.so"就可以了。
提示：如果php找不到so文件，请设置extension_dir。
ps：这篇东西在草稿箱里呆很久了，最后还是决定把一篇分多篇发吧，这样感觉快多了。
参考资料：
http://www.danga.com/memcached/

http://willko.javaeye.com/blog/332993