memcached 以及 php客户端 安装

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 [b]一、服务端安装[/b] 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 tar zxvf libevent-1.4.9-stable.tar.gz cd libevent-1.4.9-stable./configuremakemake install 2.安装memcached 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 [code="java"]# whereis libevent libevent: /usr/local/lib/libevent.la /usr/local/lib/libevent.so /usr/local/lib/libevent.a # 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 # ln -s /usr/local/lib/libevent-1.4.so.2 /lib64/[/code] [b]二、php安装对memcached的支持[/b] 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 [code="java"]# tar zxvf libmemcached-0.26.tar.gz # cd libmemcached-0.26 # ./configure --prefix=/usr/local/libmemcached/ --with-libmemcached-dir=/usr/local/libmemcached/ # make # make install[/code] 安装php memcached客户端 下载地址：http://pecl.php.net/get/memcached [code="java"]# tar zxvf memcached-0.1.4.tgz # cd memcached-0.1.4 # ./configure --with-php-config=/usr/local/php/bin/php-config --with-libmemcached-dir=/usr/local/libmemcached/ # make # make install[/code] 修改php.ini添加extension = "memcached.so"就可以了。 如果出现错误 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 [code="java"]# tar zxvf memcache-3.0.3.tgz # cd memcache-3.0.3 # /usr/local/php/bin/phpize # ./configure --with-php-config=/usr/local/php/bin/php-config # make # make install [/code] 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/ 相关资源：Linux下安装Memcached服务器和客户端与PHP使用示例