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Linux下Memcache的安装方法

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这篇文章主要讲解了“Linux下的memcache的安装方法”,文中的讲解内容简单清晰,易于学习与理解,下面请大家跟着小编的思路慢慢深入,一起来研究和学习“Linux下的Memcache的安装方法”吧!

由于memcached安装时,需要使用libevent类库,所以先安装libevent

libevent下载网址:http://www.monkey.org/~provos/libevent/

本手册中下载的是 libevent-1.4.8-stable.tar.gz版本安装步骤如下:

1. 解压缩

tar xzfv libevent-1.4.8-stable.tar.gz

2. 进入到 libevent-1.4.8-stable目录

cd libevent-1.4.8-stable

3. 编译,安装

./configure

make

make install

注:默认安装到/usr/local/lib/ 目录

接下来,安装memcached

memcached下载网址:http://www.danga.com/memcached/download.bml

本手册中下载的是 memcached-1.2.6.tar.gz版本

安装步骤如下:

1. 解压缩

tar xzfv memcached-1.2.6.tar.gz

2. 进入到 memcached-1.2.6目录

cd memcached-1.2.6

3. 编译,安装

./configure --prefix=/local/memcached

make

make install

安装完成后,会在 /local/memcached 出现 bin和share目录

进行 bin目录,启动 memcache

方法如下:

./memcached -d -u nobody -m 512 127.0.0.1 -p 11211

此时,会报一个异常

error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory

原因是找不到libevent-1.4.so.2类库,解决办法如下:

使用LD_DEBUG=help ./memcached -v来确定 加载的类库路径,方法如下:

LD_DEBUG=libs ./memcached -v 2>&1 > /dev/null | less

则系统会显示:

linux:/local/memcached/bin # LD_DEBUG = libs ./memcached -v  2 >& 1  > /dev/null | less

20421 :     find library = libevent- 1.4 .so .2 ;  searching

20421 :      search cache = /etc/ld.so.cache

20421 :      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)

20421 :       trying file = /lib/tls/i686/sse2/libevent- 1.4 .so .2

20421 :       trying file = /lib/tls/i686/libevent- 1.4 .so .2

20421 :       trying file = /lib/tls/sse2/libevent- 1.4 .so .2

20421 :       trying file = /lib/tls/libevent- 1.4 .so .2

20421 :       trying file = /lib/i686/sse2/libevent- 1.4 .so .2

20421 :       trying file = /lib/i686/libevent- 1.4 .so .2

20421 :       trying file = /lib/sse2/libevent- 1.4 .so .2

20421 :       trying file = /lib/libevent- 1.4 .so .2

20421 :       trying file = /usr/lib/tls/i686/sse2/libevent- 1.4 .so .2

20421 :       trying file = /usr/lib/tls/i686/libevent- 1.4 .so .2

20421 :       trying file = /usr/lib/tls/sse2/libevent- 1.4 .so .2

20421 :       trying file = /usr/lib/tls/libevent- 1.4 .so .2

20421 :       trying file = /usr/lib/i686/sse2/libevent- 1.4 .so .2

20421 :       trying file = /usr/lib/i686/libevent- 1.4 .so .2

20421 :       trying file = /usr/lib/sse2/libevent- 1.4 .so .2

20421 :       trying file = /usr/lib/libevent- 1.4 .so .2

20421 :

./memcached: error while loading shared libraries: libevent- 1.4 .so .2 : cannot open shared object file: No such file or directory

我们看到,memcached会到很多地方去找,所以根据其它求,我们只需建一个软链接,指定到我们安装的类库上即可

方法如下:

ln -s /usr/local/lib/libevent-1.4.so.2 /lib/libevent-1.4.so. 2

现在可以正常启动memcached了

./memcached -d -u nobody -m 512 127.0.0.1 -p 11211

到这里,看到memcached已经启动,说明安装成功。

如果要结束Memcache进程,执行:

# kill `cat /tmp/memcached.pid`

也可以启动多个守护进程,不过端口不能重复。

memcache启动参数说明:

-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,如果有多个地址的话,我这里指定了服务器的IP地址192.168.0.200,

-p是设置Memcache监听的端口,我这里设置了12000,***是1024以上的端口,

-c选项是***运行的并发连接数,默认是1024,我这里设置了256,按照你服务器的负载量来设定,

-P是设置保存Memcache的pid文件,我这里是保存在 /tmp/memcached.pid

标签: memcache