01.安装Memcached

1.安装Memcached

1.下载Memcached及其依赖

下载memcached-1.4.24.tar.gz和libevent-2.0.22-stable.tar.gz文件并解压如下：

[[email protected] libevent]$ tar -zxvf libevent-2.0.22-stable.tar.gz 

[[email protected] Memcached]$ tar -zxvf memcached-1.4.24.tar.gz 

2.安装memcached

先安装libevent：

[[email protected] libevent-2.0.22-stable]$ cd /home/lizhiwei/SoftWare/libevent/libevent-2.0.22-stable
[[email protected] libevent-2.0.22-stable]$ ./configure -prefix=/home/lizhiwei/InstallSoft/libevent 
[[email protected] libevent-2.0.22-stable]$ make
[[email protected] libevent-2.0.22-stable]$ make install

安装memcached，同时需要安装中指定libevent的安装位置：

[[email protected] libevent-2.0.22-stable]$ cd /home/lizhiwei/SoftWare/Memcached/memcached-1.4.24
[[email protected] memcached-1.4.24]$ ./configure -prefix=/home/lizhiwei/InstallSoft/memcached  -with-libevent=/home/lizhiwei/InstallSoft/libevent/
[[email protected] memcached-1.4.24]$ make
[[email protected] memcached-1.4.24]$ make install

此时memcached安装完成，安装路径：/home/lizhiwei/InstallSoft/memcached

2.启动Memcached

1.启动memcached并参看服务

[[email protected] memcached]$ cd /home/lizhiwei/InstallSoft/memcached/bin/
[[email protected] bin]$ ll
total 356
-rwxr-xr-x. 1 lizhiwei lizhiwei 360894 Oct  1 20:52 memcached
[[email protected] bin]$ ./memcached -d -m 10 -u lizhiwei -l 127.0.0.1 -p 12000 -c 256 -P /tmp/memcached.pid      
[[email protected] bin]$ ps -ef | grep memcached
lizhiwei  24004      1  0 20:59 ?        00:00:00 ./memcached -d -m 10 -u lizhiwei -l 127.0.0.1 -p 12000 -c 256 -P /tmp/memcached.pid
lizhiwei  24018  14869  0 21:00 pts/2    00:00:00 grep memcached
[[email protected] bin]$ cat /tmp/memcached.pid
24004
[[email protected] bin]$ 

./memcached -d -m 10 -u lizhiwei -l 127.0.0.1 -p 12000 -c 256 -P /tmp/memcached.pid 启动命令说明：

-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lizhiwei

-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127.0.0.1

-p 是设置Memcache监听的端口，我这里设置了12000，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，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

2.停止Memcache服务

使用kill -9 进程PID 命令停止Memcache服务

[[email protected] bin]$ ps -ef | grep memcached
lizhiwei  24004      1  0 20:59 ?        00:00:00 ./memcached -d -m 10 -u lizhiwei -l 127.0.0.1 -p 12000 -c 256 -P /tmp/memcached.pid
lizhiwei  24069  14869  0 21:07 pts/2    00:00:00 grep memcached
[[email protected] bin]$ kill -9 24004
[[email protected] bin]$ ps -ef | grep memcached
lizhiwei  24072  14869  0 21:07 pts/2    00:00:00 grep memcached
[[email protected] bin]$ 

3.连接Memcache服务

[[email protected] ~]$ telnet 127.0.0.1 11211
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is ‘^]‘.
set name 0 64 5
abcde
STORED
get name
VALUE name 0 5
abcde
END
quit
Connection closed by foreign host.
[[email protected] ~]$ 

telnet 使用说明：

telnet 127.0.0.1 11211 连接到IP地址127.0.0.1，端口号11211

set name 0 64 5 格式：<command name> <key> <flags> <exptime> <bytes>

<command name> ：set/add/replace

<key> ：查找关键字

<flags> ：整型参数，客户机使用它存储关于键值对的额外信息

<exptime> ：该数据的存活时间（以秒为单位，0 表示永远）

<bytes> ：存储字节数，注意：设置了存储大小就必须存储一样大小的数据，否则会操作失败

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来自为知笔记(Wiz)