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234rew 发表于 2015-11-30 08:58:12

centos安装memcached

安装环境：Centos 6.4 32位   memcached-1.4.25   libevent-2.0.22-stable
memcached是基于libevent的，所以要安装libevent，而memcached和libevent是由C编写的，所以系统要安装gcc。

一、下载libevent，memcached，安装gcc
查看是否已安装gcc


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$ rpm -qa|grep gcc
gcc-gfortran-4.4.7-3.el6.i686
libgcc-4.4.7-3.el6.i686
compat-libgcc-296-2.96-144.el6.i686
gcc-4.4.7-3.el6.i686
gcc-c++-4.4.7-3.el6.i686




如果没有安装gcc，直接yum安装即可

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$ sudo yum -y install gcc
$ sudo yum -y install gcc-c++




下载memcached-1.4.25   libevent-2.0.22-stable

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$ wget http://memcached.org/files/memcached-1.4.25.tar.gz
$ wget http://nchc.dl.sourceforge.net/project/levent/libevent/libevent-2.0/libevent-2.0.22-stable.tar.gz




二、编译安装 libevent-2.0.22-stable
查看是否已安装libevent，如已安装旧版本，可以删去

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$ rpm -qa|grep libevent
libevent-1.4.13-4.el6.i686
$ rpm -e --nodeps libevent-1.4.13-4.el6.i686




解压、编译安装libevent

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$ tar zxf libevent-2.0.22-stable.tar.gz
$ cd libevent-2.0.22-stable
$ ./configure --prefix=/usr
$ echo $?
0
$ sudo make
$ echo $?
0
$ sudo make install
$ echo $?
0
$ sudosu -
# cd /usr/lib
如有以下文件即安装成功
# ll|grep libevent
lrwxrwxrwx.1 root root       21 Nov 30 20:07 libevent-2.0.so.5 -> libevent-2.0.so.5.1.9
-rwxr-xr-x.1 root root   756947 Nov 30 20:07 libevent-2.0.so.5.1.9
-rw-r--r--.1 root root   986992 Nov 30 20:07 libevent.a
lrwxrwxrwx.1 root root       26 Nov 30 20:07 libevent_core-2.0.so.5 -> libevent_core-2.0.so.5.1.9
-rwxr-xr-x.1 root root   464122 Nov 30 20:07 libevent_core-2.0.so.5.1.9
-rw-r--r--.1 root root   620796 Nov 30 20:07 libevent_core.a
-rwxr-xr-x.1 root root      970 Nov 30 20:07 libevent_core.la
lrwxrwxrwx.1 root root       26 Nov 30 20:07 libevent_core.so -> libevent_core-2.0.so.5.1.9
lrwxrwxrwx.1 root root       27 Nov 30 20:07 libevent_extra-2.0.so.5 -> libevent_extra-2.0.so.5.1.9
-rwxr-xr-x.1 root root   310856 Nov 30 20:07 libevent_extra-2.0.so.5.1.9
-rw-r--r--.1 root root   366268 Nov 30 20:07 libevent_extra.a
-rwxr-xr-x.1 root root      977 Nov 30 20:07 libevent_extra.la
lrwxrwxrwx.1 root root       27 Nov 30 20:07 libevent_extra.so -> libevent_extra-2.0.so.5.1.9
-rwxr-xr-x.1 root root      935 Nov 30 20:07 libevent.la
lrwxrwxrwx.1 root root       30 Nov 30 20:07 libevent_pthreads-2.0.so.5 -> libevent_pthreads-2.0.so.5.1.9
-rwxr-xr-x.1 root root    14577 Nov 30 20:07 libevent_pthreads-2.0.so.5.1.9
-rw-r--r--.1 root root    12166 Nov 30 20:07 libevent_pthreads.a
-rwxr-xr-x.1 root root      998 Nov 30 20:07 libevent_pthreads.la
lrwxrwxrwx.1 root root       30 Nov 30 20:07 libevent_pthreads.so -> libevent_pthreads-2.0.so.5.1.9
lrwxrwxrwx.1 root root       21 Nov 30 20:07 libevent.so -> libevent-2.0.so.5.1.9




三、编译安装 memcached-1.4.25

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$ tar zxf memcached-1.4.25.tar.gz
$ cd memcached-1.4.25
$ ./configure --with-libevent=/usr --prefix=/home/pfq/memcached
$ echo $?
0
$ sudo make
$ echo $?
0
$ sudo make install
$ echo $?
0
如有以下文件即安装成功
$ ll memcached
total 12
drwxr-xr-x. 2 root root 4096 Nov 30 20:28 bin
drwxr-xr-x. 3 root root 4096 Nov 30 20:28 include
drwxr-xr-x. 3 root root 4096 Nov 30 20:28 share




四、memcached启动与停止

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$ memcached/bin/memcached -d -m 10 -u pfq -l 192.168.88.141 -p 12000 -c 256 -P /tmp/memcached.pid
$ telnet 192.168.88.141 12000
-bash: telnet: command not found
$ sudo yun install -y telnet
sudo: yun: command not found
$ sudo yum install -y telnet
$ telnet 192.168.88.141 12000
Trying 192.168.88.141...
Connected to 192.168.88.141.
Escape character is '^]'.
输入stats
STAT pid 8162
STAT uptime 128
STAT time 1448887058
STAT version 1.4.25
STAT libevent 2.0.22-stable
STAT pointer_size 32
STAT rusage_user 0.001999
STAT rusage_system 0.037994
STAT curr_connections 5
STAT total_connections 6
STAT connection_structures 6
STAT reserved_fds 20
STAT cmd_get 0
STAT cmd_set 0
STAT cmd_flush 0
STAT cmd_touch 0
STAT get_hits 0
STAT get_misses 0
STAT delete_misses 0
STAT delete_hits 0
STAT incr_misses 0
STAT incr_hits 0
STAT decr_misses 0
STAT decr_hits 0
STAT cas_misses 0
STAT cas_hits 0
STAT cas_badval 0
STAT touch_hits 0
STAT touch_misses 0
STAT auth_cmds 0
STAT auth_errors 0
STAT bytes_read 7
STAT bytes_written 0
STAT limit_maxbytes 10485760
STAT accepting_conns 1
STAT listen_disabled_num 0
STAT time_in_listen_disabled_us 0
STAT threads 4
STAT conn_yields 0
STAT hash_power_level 16
STAT hash_bytes 262144
STAT hash_is_expanding 0
STAT malloc_fails 0
STAT bytes 0
STAT curr_items 0
STAT total_items 0
STAT expired_unfetched 0
STAT evicted_unfetched 0
STAT evictions 0
STAT reclaimed 0
STAT crawler_reclaimed 0
STAT crawler_items_checked 0
STAT lrutail_reflocked 0
END
quit
Connection closed by foreign host.
这表示启动成功
$ kill -9 8162（即上面STAT pid）
$ telnet 192.168.88.141 12000
Trying 192.168.88.141...
telnet: connect to address 192.168.88.141: Connection refused
memcached已停止




启动参数说明：

-d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；
-u是运行Memcache的用户；
-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，按照服务器的负载量来设定；
-P是设置保存Memcache的pid文件；

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