memcache安装

安装说明，参见官方文档：http://code.google.com/p/memcached/wiki/NewInstallFromSource

Prereqs
You'll likely need to install the development package for libevent
1、下载http://libevent.org/  最新稳定版libevent-2.0.21-stable.tar.gz

1、安装 libevent
# tar zxvf libevent-2.0.21-stable.tar.gz
# cd libevent-2.0.21-stable
# ./configure –prefix=/usr
# make
# make install

测试libevent是否安装成功：
默认是安装在 /usr/local/lib目录下的.
# ls -al /usr/lib | grep libevent
lrwxrwxrwx.  1 root root      21 Jan 13 17:47 libevent-2.0.so.5 -> libevent-2.0.so.5.1.9
-rwxr-xr-x.  1 root root  968770 Jan 13 17:47 libevent-2.0.so.5.1.9
-rw-r--r--.  1 root root 1571722 Jan 13 17:47 libevent.a
lrwxrwxrwx.  1 root root      26 Jan 13 17:47 libevent_core-2.0.so.5 -> libevent_core-2.0.so.5.1.9
-rwxr-xr-x.  1 root root  585313 Jan 13 17:47 libevent_core-2.0.so.5.1.9
-rw-r--r--.  1 root root  978426 Jan 13 17:47 libevent_core.a
-rwxr-xr-x.  1 root root     970 Jan 13 17:47 libevent_core.la
......


2、安装memcache
下载memcached  地址：http://code.google.com/p/memcached/downloads/list
 
#tar -zxvf memcached-1.x.x.tar.gz
#cd memcached-1.x.x

Config
Optional install destination
If your compiling from source you likely want to specify a destination directory as well, replace /usr/local/memcached with whatever you fancy.

#./configure -with-libevent=/usr/


#make && make test
#sudo make install


测试memcache是否安装成功
#  ls -al /usr/local/bin/mem*
-rwxr-xr-x. 1 root root 260977 Jan 13 17:54 /usr/local/bin/memcached


启动：
# /usr/local/bin/memcached -d -c 1024 -m 1024 -u root

若出现
/usr/local/bin/memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory
我们要知道memcached去是哪些目录查找libevent动态库的,这里用这个命令
#LD_DEBUG=libs memcached -v

26887:    find library=libevent-2.0.so.5 [0]; searching
     26887:     search cache=/etc/ld.so.cache
     26887:     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)
     26887:      trying file=/lib64/tls/x86_64/libevent-2.0.so.5
     26887:      trying file=/lib64/tls/libevent-2.0.so.5
     26887:      trying file=/lib64/x86_64/libevent-2.0.so.5
     26887:      trying file=/lib64/libevent-2.0.so.5
     26887:      trying file=/usr/lib64/tls/x86_64/libevent-2.0.so.5
     26887:      trying file=/usr/lib64/tls/libevent-2.0.so.5
     26887:      trying file=/usr/lib64/x86_64/libevent-2.0.so.5
     26887:      trying file=/usr/lib64/libevent-2.0.so.5
     26887:    
memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory

我们得知memcached查找动态库的位置是 /lib64 和 /usr/lib64/,所以我们只需把libevent-2.0.so.5 链接到这两个目录就可以了

#ln -s /usr/local/lib/libevent-2.0.so.5 /usr/lib64/libevent-2.0.so.5

查看memcache进程
#ps aux|grep memcached
root     26912  0.2  0.0 326700  1004 ?        Ssl  18:13   0:00 /usr/local/bin/memcached -d -c 1024 -m 1024 -u root
root     26919  0.0  0.0 103240   820 pts/1    S+   18:13   0:00 grep memcached