潇湘夜雨移动版

1、下载安装redis

wget http://download.redis.io/releases/redis-3.2.8.tar.gz

tar -zxvf redis-3.2.8.tar.gz 

cd redis-3.2.8

make

cp -r -c src/ /usr/local/redis #复制编译后的应用程序到安装路径

更改配置文件：

bind 0.0.0.0

protected-mode no

port 6379

tcp-backlog 511

timeout 0

tcp-keepalive 300

daemonize yes #后台运行

supervised no

pidfile /var/run/redis_6379.pid

loglevel notice

logfile  /var/log/redis/redis.log #日志文件路径

databases 16 #默认16个库

save 900 1

save 300 10

save 60 10000

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename dump.rdb

dir /data/redis/ #数据库快照路径

slave-serve-stale-data yes

slave-read-only yes

repl-diskless-sync no

repl-diskless-sync-delay 5

repl-disable-tcp-nodelay no

slave-priority 100

maxmemory 2gb #最大内存限制

maxmemory-policy volatile-lru #keys都有过期时间，可以通过该策略清楚过期的key

2、启动redis服务

[yanfa@web1 ~]$  /usr/local/redis/redis-server  /usr/local/redis/redis.conf 

[yanfa@web1 ~]$ netstat -tnlp |grep redis

tcp        0      0 0.0.0.0:6379                0.0.0.0:*                   LISTEN      13278/redis-server  

 

[yanfa@web1 redis]$ ./redis-cli -h web1 shutdown  #关闭redis

 

3、登录测试：

[yanfa@web1 redis]$ ./redis-cli

127.0.0.1:6379> keys *

(empty list or set)

127.0.0.1:6379> set mykey abc

OK

127.0.0.1:6379> get mykey

"abc"

 

test:6379> client list #查询客户端连接

id=39 addr=10.0.14.170:59492 fd=9 name= age=37 idle=7 flags=N db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=0 obl=0 oll=0 omem=0 events=r cmd=ping

 

test:6379> info memory #查询内存配置信息

# Memory

used_memory:1014632

used_memory_human:990.85K

used_memory_rss:2486272

used_memory_rss_human:2.37M

used_memory_peak:1301488

used_memory_peak_human:1.24M

total_system_memory:4018601984

total_system_memory_human:3.74G

used_memory_lua:37888

used_memory_lua_human:37.00K

maxmemory:2097152

maxmemory_human:2.00M

maxmemory_policy:volatile-lru

mem_fragmentation_ratio:2.45

mem_allocator:jemalloc-4.0.3

 

[yanfa@web1 redis]$ ./redis-cli -r 100 -i 1 info | grep used_memory_human #实时查看redis的内存使用量

used_memory_human:2.74M

used_memory_human:2.74M

 

(integer) 1494398314

test:6379> monitor #实时打印出 Redis 服务器接收到的命令，调试用

OK

1494398968.836528 [0 10.0.14.170:56162] "PING"

1494398968.836676 [0 10.0.14.170:56162] "SELECT" "0"

1494398968.836771 [0 10.0.14.170:56162] "KEYS" "GPS_20_*"

 

test:6379> DBSIZE #统计keys的个数

(integer) 11334

 

test:6379> EXPIRE mykeys 600 #设置过期时间

(integer) 1

test:6379> TTL mykeys #查询生存时间

(integer) 592

test:6379> FLUSHALL #清楚所有数据

OK

test:6379> keys *

test:6379[1]> SELECT 2 #切换到数据库2

OK

test:6379[2]> KEYS *

1) "my"

 

4、常见错误或提醒

 

24631:M 09 May 16:12:06.889 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.

说明：设置/proc/sys/net/core/somaxconn参数大于511，系统默认128，并发量大的情况下可以调整，一般不用管。

 

24631:M 09 May 16:12:06.889 # Server started, Redis version 3.2.8

24631:M 09 May 16:12:06.889 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.

 

说明：过量使用内存的提醒，如果不想报警可设置 echo 1 > /proc/sys/vm/overcommit_memory

但是为了系统稳定，不建议修改。

5、redis压力测试

 

[yanfa@test script]$ cat redis.sh #批量插入redis key

#!/bin/bash

for ((i=1;i<20000;i++))

do

echo -en "helloworld" | /usr/local/redis/redis-cli -h test  -x set name$i >>redis.log

done