1.簡單主從複製
redis-server /redis_node_test/6382/redis.conf //啓動6382redis進程
redis-server /redis_node_test/6383/redis.conf //啓動6383redis進程
ss -ntulp|grep redis
tcp LISTEN 0 128 127.0.0.1:6382 *:* users:(("redis-server",20961,4))
tcp LISTEN 0 128 127.0.0.1:6383 *:* users:(("redis-server",21013,4))
redis-cli -p 6382 //客戶端登錄6382
127.0.0.1:6382>
redis-cli -p 6383 //客戶端登錄6383
127.0.0.1:6383>
將6382設爲主庫，可以在6383命令行上面設置
127.0.0.1:6383>
127.0.0.1:6383> slaveof 127.0.0.1 6382
OK
查看下自身信息
# Replication
role:slave
master_host:127.0.0.1
master_port:6382
master_link_status:up
在6382上面查看
127.0.0.1:6382> info
# Replication
role:master
connected_slaves:1
slave0:ip=127.0.0.1,port=6383,state=online,offset=71,lag=1
主從關係已經建好，但是一旦重啓便會失效，如果想永久生效需要寫在配置文件中(redis.conf)
現在可以進行簡單主從複製測試
在6382主上寫數據
127.0.0.1:6382> set name helloworld
OK
在6383從上面擦汗看數據
127.0.0.1:6383> get name
"helloworld"
2.加密的主從複製
vim /redis_node_test/6382/redis.conf
requirepass 123456 //主服務器連接密碼
vim /redis_node_test/6383/redis.conf
slaveof 127.0.0.1 6382
masterauth 123456
redis-server /redis_node_test/6382/redis.conf
redis-server /redis_node_test/6383/redis.conf
redis-cli -p 6382
127.0.0.1:6382> info
NOAUTH Authentication required.
報錯
redis-cli -p 6382 -a 123456
127.0.0.1:6382> info
# Replication
role:master
connected_slaves:1
slave0:ip=127.0.0.1,port=6383,state=online,offset=729,lag=0
這樣就不報錯了
有時候主從數據可能會不一致，因爲redis是異步寫入磁盤的，此時有可能部分數據還在內存中，沒有同步到磁盤，要想現在強制同步到磁盤，需要執行如下命令
redis-cli -p 6382 save
redis-cli -p 6383 save
如果想讓redis變成內存型數據庫只需要做如下操作
去掉配置文件的如下內容
# Save the DB on disk:
#
# save <seconds> <changes>
#
# Will save the DB if both the given number of seconds and the given
# number of write operations against the DB occurred.
#
# In the example below the behaviour will be to save:
# after 900 sec (15 min) if at least 1 key changed
# after 300 sec (5 min) if at least 10 keys changed
# after 60 sec if at least 10000 keys changed
#
# Note: you can disable saving completely by commenting out all "save" lines.
#
# It is also possible to remove all the previously configured save
# points by adding a save directive with a single empty string argument
# like in the following example:
#
# save ""
save 900 1
save 300 10
save 60 10000
改成如下格式
save 10000000000 10000000000 前面一個數字是表示數據發生改變後多久寫入硬盤，後面數字表示有多少個key發生改變才寫入硬盤