centsOs（Linux） memcache 安装教程

安装

Linux：centOs5.4

安装libevent库

cd /usr/local/src
wget http://monkey.org/~provos/libevent-1.3b.tar.gz
tar zxvf libevent-1.3b.tar.gz
cd libevent-1.3b
./configure
make && make install

安装成功
安装memcache

cd /usr/local/src
wget http://danga.com/memcached/dist/memcached-1.2.5.tar.gz
tar zxvf memcached-1.2.5.tar.gz
cd memcached-1.2.5
./configure
make && make install

启动

cd  usr/local/bin
bin] # memcached –h
出错
memcached: error while loading shared libraries: libevent-1.3b.so.1: cannot open shared object file: No such file or directory

google解决方法: http://bbs.yiwz.net/archiver/?tid-86.html

则运行 LD_DUBUG=libs 就可以知道memcached启动时库的加载路径。具体如下

[root@bogon  usr/local/bin]# LD_DEBUG=libs  memcached –v
      5112:     find library=libevent-1.3b.so.1 [0]; searching
      5112:      search cache=/etc/ld.so.cache
      5112:      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)
      5112:       trying file=/lib/tls/i686/sse2/libevent-1.3b.so.1
      5112:       trying file=/lib/tls/i686/libevent-1.3b.so.1
      5112:       trying file=/lib/tls/sse2/libevent-1.3b.so.1
      5112:       trying file=/lib/tls/libevent-1.3b.so.1
      5112:       trying file=/lib/i686/sse2/libevent-1.3b.so.1
      5112:       trying file=/lib/i686/libevent-1.3b.so.1
      5112:       trying file=/lib/sse2/libevent-1.3b.so.1
      5112:       trying file=/lib/libevent-1.3b.so.1
      5112:       trying file=/usr/lib/tls/i686/sse2/libevent-1.3b.so.1
      5112:       trying file=/usr/lib/tls/i686/libevent-1.3b.so.1
      5112:       trying file=/usr/lib/tls/sse2/libevent-1.3b.so.1
      5112:       trying file=/usr/lib/tls/libevent-1.3b.so.1
      5112:       trying file=/usr/lib/i686/sse2/libevent-1.3b.so.1
      5112:       trying file=/usr/lib/i686/libevent-1.3b.so.1
      5112:       trying file=/usr/lib/sse2/libevent-1.3b.so.1
      5112:       trying file=/usr/lib/libevent-1.3b.so.1

然后给libevent-1.3b.so.1建立一个链接：

[root@bogon ~]# sudo ln -s /usr/local/lib/libevent-1.3b.so.1 /lib/libevent-1.3b.so.1

检查是否建立成功

[root@bogon ~]# ls -al /lib|grep libevent
lrwxrwxrwx  1 root root      33 Aug 25 19:52 libevent-1.3b.so.1 -> /usr/local/lib/libevent-1.3b.so.1

此时在

bin] # memcached –h

memcached 1.2.5
-p <num>      TCP port number to listen on (default: 11211)
-U <num>      UDP port number to listen on (default: 0, off)
-s <file>     unix socket path to listen on (disables network support)
-a <mask>     access mask for unix socket, in octal (default 0700)
-l <ip_addr>  interface to listen on, default is INDRR_ANY
-d            run as a daemon
-r            maximize core file limit
-u <username> assume identity of <username> (only when run as root)
-m <num>      max memory to use for items in megabytes, default is 64 MB
-M            return error on memory exhausted (rather than removing items)
-c <num>      max simultaneous connections, default is 1024
-k            lock down all paged memory.  Note that there is a
              limit on how much memory you may lock.  Trying to
              allocate more than that would fail, so be sure you
              set the limit correctly for the user you started
              the daemon with (not for -u <username> user;
              under sh this is done with 'ulimit -S -l NUM_KB').
-v            verbose (print errors/warnings while in event loop)
-vv           very verbose (also print client commands/reponses)
-h            print this help and exit
-i            print memcached and libevent license
-b            run a managed instanced (mnemonic: buckets)
-P <file>     save PID in <file>, only used with -d option
-f <factor>   chunk size growth factor, default 1.25
-n <bytes>    minimum space allocated for key+value+flags, default 48

现在memcache成功搞定

默认情况下memcached安装到/usr/local/bin下。

启动：

[root@bogon bin]# memcached -d -m 128 -u root -p 11211

检查是否已经启动

[root@bogon bin]#  telnet 127.0.0.1 11211
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.

这里使用的memcached启动选项的内容如下。
选项说明
p 使用的TCP端口。默认为11211
m 最大内存大小。默认为64M
vv 用very vrebose模式启动，调试信息和错误输出到控制台
d 作为daemon在后台启动

查看memcached的内部状态

[root@bogon bin]# cd /usr/local/bin
[root@bogon bin]# telnet 127.0.0.1 11211
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
stats
STAT pid 6779
STAT uptime 14217
STAT time 1314343512
STAT version 1.2.5
STAT pointer_size 32
STAT rusage_user 0.002999
STAT rusage_system 0.027995
STAT curr_items 0
STAT total_items 0
STAT bytes 0
STAT curr_connections 3
STAT total_connections 4
STAT connection_structures 4
STAT cmd_get 0
STAT cmd_set 0
STAT get_hits 0
STAT get_misses 0
STAT evictions 0
STAT bytes_read 56
STAT bytes_written 482
STAT limit_maxbytes 134217728
STAT threads 1
END
Quit

到此为止说明你的memcached安装成功了