[大数据]Memcached安装

安装Memcached

安装必要memcached libmemcached libevent

yum install -y memcached libmemcached libevent

开启memcached服务

 systemctl start memcached

查看Memcached运行状态

# memcached-tool 127.0.0.1:11211  stats
或者echo stats |nc 127.0.0.1 11211  需要安装nc工具  yum install -y nc
若安装libmemcached后，可以使用命令
memstat --servers=127.0.0.1:11211 查看memcached服务状态

Memcached命令行

# yum install -y telnet
# telnet 127.0.0.1 11211
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
set key2 0 30 2
ab
STORED
get key2
VALUE key2 0 2
ab
END

Memcached数据示例

# telnet 127.0.0.1 11211
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
set key3 1 100 4
abcd
STORED
get key3
VALUE key3 1 4
abcd
END

replace key3 1 200 5
abcdx
STORED

get key3
VALUE key3 1 5
abcdx
END

delete key3
DELETED

get key3
END 

Memcached数据导出和导入

导出：

# memcached-tool 127.0.0.1:11211 dump > data.txt
Dumping memcache contents
  Number of buckets: 0
  Number of items  : 

导入：

nc 127.0.0.1 11211 < data.txt

注：若nc命令不存在，yum install nc