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memcached安装       

1. 下载, memcached需要先安装libevent memcached的下载地址:http://www.danga.com/memcached/dist/memcached-1.2.6.tar.gzs

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libevent的下载地址 :http://www.monkey.org/~provos/libevent-1.2.tar.gz

                                 

    #cd /usr/local     #mkdir memcached     #mkdir libevent 2. 安装libevent        #  tar xzvf libevent-1.2.tar.gz        # cd libevent-1.2       # ./configure --prefix=/usr/local/libevent          # make          # make install      检查是否安装成功:     #cd /usr/local/libevent/lib         如果有libevent-1.3c.so.1  libevent-1.3c.so.1.0.3  libevent.a  libevent.la  libevent.so 这几个文件存在，说明安装成功 3.安装memcached         #  tar xzvf memcached-1.2.6.tar.gz           # cd memcached-1.2.6         # ./configure --with-libevent=/usr/local/libevent --prefix=/usr/local/memcached         # make          # make install      检查是否安装成功:     #cd /usr/local/memcached/bin     如果memcached  memcached-debug这2个文件存在，说明安装成功 4.执行        #cd /usr/local/memcached/bin        # ./memcached -h       如果出现：        1. memcached 1.2.6         2. -p       TCP port number to listen on (default: 11211)          3. -U       UDP port number to listen on (default: 0, off)          4. -s      unix socket path to listen on (disables network support)          5. -l   interface to listen on, default is INDRR_ANY          6. -d            run as a daemon          7. -r            maximize core file limit          8. -u  assume identity of  (only when run as root)          9. -m       max memory to use for items in megabytes, default is 64 MB         10. -M            return error on memory exhausted (rather than removing items)         11. -c       max simultaneous connections, default is 1024        12. -k            lock down all paged memory         13. -v            verbose (print errors/warnings while in event loop)         14. -vv           very verbose (also print client commands/reponses)         15. -h            print this help and exit         16. -i            print memcached and libevent license         17. -b            run a managed instanced (mnemonic: buckets)         18. -P      save PID in , only used with -d option         19. -f    chunk size growth factor, default 1.25        20. -n     minimum space allocated for key+value+flags, default 48      说明安装成功，并且路径配置正确。     有可能会出现：        memcached: error while loading shared libraries: libevent-1.2.so.1: cannot open shared object file: No such file or directory      说明 没有找到文件：libevent-1.2.so.1     解决办法：     第一步. 查看下lib路径:     [farman@localhost bin]$ LD_DEBUG=libs /usr/local/memcached/bin/memcached -v          31386:     find library=libevent-1.2.so.1 [0]; searching          31386:      search cache=/etc/ld.so.cache          31386:      search path=/lib/tls/i686/sse2:/lib/tls/i686:/lib/tls/sse2:/lib/tls:/lib/i686/sse2:/lib/i686:/lib/sse2:/lib:/usr/lib/tls/i686/sse2:/usr/lib/tls/i686:/usr/lib/tls/sse2:/usr/lib/tls:/usr/lib/i686/sse2:/usr/lib/i686:/usr/lib/sse2:/usr/lib                (system search path)          31386:       trying file=/lib/tls/i686/sse2/libevent-1.2.so.1          31386:       trying file=/lib/tls/i686/libevent-1.2.so.1          31386:       trying file=/lib/tls/sse2/libevent-1.2.so.1          31386:       trying file=/lib/tls/libevent-1.2.so.1          31386:       trying file=/lib/i686/sse2/libevent-1.2.so.1          31386:       trying file=/lib/i686/libevent-1.2.so.1          31386:       trying file=/lib/sse2/libevent-1.2.so.1          31386:       trying file=/lib/libevent-1.2.so.1          31386:       trying file=/usr/lib/tls/i686/sse2/libevent-1.2.so.1          31386:       trying file=/usr/lib/tls/i686/libevent-1.2.so.1          31386:       trying file=/usr/lib/tls/sse2/libevent-1.2.so.1          31386:       trying file=/usr/lib/tls/libevent-1.2.so.1          31386:       trying file=/usr/lib/i686/sse2/libevent-1.2.so.1          31386:       trying file=/usr/lib/i686/libevent-1.2.so.1          31386:       trying file=/usr/lib/sse2/libevent-1.2.so.1          31386:       trying file=/usr/lib/libevent-1.2.so.1          31386:     /home/farman/cacheinstall/bin/memcached: error while loading shared libraries: libevent-1.2.so.1: cannot open shared object file: No such file or directory     第二步. 将libevent-1.3c.so.1拷贝到任何一个列出的lib 下就可以了。     或者 软链接     [farman@localhost lib]$ su root     Password:     [root@localhost lib]# ln -s /home/farman/install/lib/libevent-1.2.so.1 /usr/lib/libevent-1.2.so.1     启动服务 ：     [root@localhost lib]# exit     不能用root启动         前台启动测试     [farman@localhost bin]#./memcached -m 10 -p 12000 -c 256 -vv         后台启动     [farman@localhost bin]#./memcached -d -m 10 -p 12000 -c 256 -P /tmp/memcached.pid                            ./memcached -d -m 128 -u root -l 127.0.0.1 -p 11211 -c 64 -P /tmp/memcached.pid     参数说明:         -d选项是启动一个守护进程     -m是分配给Memcache使用的内存数量，单位是MB，我这里是10MB     -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

核心步骤：wget下载libevent和memcached1.先安装libevent。配置时需要指定安装路径   即./configure --prefix=/usr；然后make；然后make install； 2.安装memcached，配置时需要指定libevent的安装路径   即./configure --with-libevent=/usr；然后make；然后make install；

Ubuntu下只需sudo apt-get install memcached即可