Nosql非关系型数据库—Redis，泛指非关系型数据库，不需要预先定义数据存储结构，表的每条记录都可以有不同的类型和格式。

Redis  Remode Dictionary

使用C语言编写的，遵守BSD的开原软件

高性能的分布式内存数据库

支持数据持久化，可以把内存里数据保存到硬盘中

不仅仅支持key/values类型的数据，同时还支持list hash set zset 类型

主持master-slave(主从同步) 模式数据备份

搭建redis服务：

LNMP+Redis

把网站服务

在主机192.168.4.53部署redis服务

在主机192.168.4.56部署LNMP服务

set keyname keyvalue

get keyname

select 1

keys *

keys a?

exits keyname

ttl keyname

type keyname

move keyname dbname

expire keyname 10

配置文件解析1：

cp /etc/redis/6379.conf /root

# 1k => 1000 bytes

# 1kb => 1024 bytes

# 1m => 1000000 bytes

# 1mb => 1024*1024 bytes

# 1g => 1000000000 bytes

# 1gb => 1024*1024*1024 bytes

bind 127.0.0.1 192.168.4.53

port 6379

tcp-backlog 511    tcp连接的队列长度

timeout 0    连接超时的时间   0代表永不超时

tcp-keepalive 300  多长时间查一次在不在线

daemonize yes(no)  以守护进程的方式运行(以非守护进程的方式运行)

supervised no

loglevel notice  日志级别(向日志文件里记录那些信息)

# warning (only very important / critical messages are logged)

logfile /var/log/redis_6379.log 

databases 16 设置数据库的个数(0-15)

565 # volatile-lru -> Evict using approximated LRU among the keys with an expire set.

566 # allkeys-lru -> Evict any key using approximated LRU.

567 # volatile-lfu -> Evict using approximated LFU among the keys with an expire set.

568 # allkeys-lfu -> Evict any key using approximated LFU.

569 # volatile-random -> Remove a random key among the ones with an expire set.

570 # allkeys-random -> Remove a random key, any key.

571 # volatile-ttl -> Remove the key with the nearest expire time (minor TTL)

572 # noeviction -> Don't evict anything, just return an error on write operations.

cd phpredis-2.2.4

phpize

./configure --with-php-config=/usr/bin/php-config

make && make install

Installing shared extensions:     /usr/lib64/php/modules/

vim /etc/php.ini

728 extension_dir = "/usr/lib64/php/modules/"

729 ; On windows:

730 extension = "redis.so"

:wq

php -m | grep -i redis

wxsro

SECURITY 设置密码   # requirepass foobared

requirepass 密码

]#redis-cli

:6379>ping

(error)NOAUTH Authentication required

:6379>auth 123456

OK

:6379>ping

PANG

:6379>quit

]#redis-cli -a 123456

:6379>ping

PANG

设置连接密码后如何使用脚本停止redis服务

/etc/init.d/redis_6379 stop

报错

vim /etc/init.d/redis_6379

36     stop)

A=`grep "^requirepass" /etc/redis/6379.conf | awk '{print $2}'`

if [ ! -z $A ]

PID=$(cat $PIDFILE)

echo "Stopping ..."

$CLIEXEC -p $REDISPORT -a $A shutdown

while [ -x /proc/${PID} ]

do

echo "Waiting for Redis to shutdown ..."

sleep 1

done  

echo "Redis stopped"

37         elif [ ! -f $PIDFILE ]

38         then

39             echo "$PIDFILE does not exist, process is not running"

40         else

41          PID=$(cat $PIDFILE)

42             echo "Stopping ..."

43             $CLIEXEC -p $REDISPORT  shutdown

44             while [ -x /proc/${PID} ]

45             do

46                 echo "Waiting for Redis to shutdown ..."

47                 sleep 1

48             done   

49             echo "Redis stopped"

50         fi