master-slave replication

redis save 备份 恢复

root@ubuntu:/etc/init.d# find / -name dump.rdb |xargs ls -alt

redis-cli save

cp /var/lib/redis/dump.rdb /var/lib/redis/BEFOREdump.rdb

redis-cli flushall

./redis-server stop

cp /var/lib/redis/BEFOREdump.rdb /var/lib/redis/dump.rdb

root@ubuntu:/etc/init.d# find / -name dump.rdb |xargs ls -alt
-rw-r--r-- 1 redis redis 18 May  5 07:36 /var/lib/redis/dump.rdb
-rw-r--r-- 1 root  root  18 May  5 06:59 /etc/redis/dump.rdb
-rw-r--r-- 1 root  root  18 May  5 06:55 /etc/init.d/dump.rdb
-rw-rw-r-- 1 wuser wuser 18 May  4 23:58 /home/wuser/dump.rdb
-rw-r--r-- 1 root  root  18 May  4 23:54 /dump.rdb
root@ubuntu:/etc/init.d# redis-cli
127.0.0.1:6379> keys
(error) ERR wrong number of arguments for 'keys' command
127.0.0.1:6379> keys *
(empty list or set)
127.0.0.1:6379> set  w2  3211
OK
127.0.0.1:6379> set  w2d  3211
OK
127.0.0.1:6379> save
OK
127.0.0.1:6379> exit
root@ubuntu:/etc/init.d# find / -name dump.rdb |xargs ls -alt
-rw-r--r-- 1 redis redis 35 May  5 07:37 /var/lib/redis/dump.rdb
-rw-r--r-- 1 root  root  18 May  5 06:59 /etc/redis/dump.rdb
-rw-r--r-- 1 root  root  18 May  5 06:55 /etc/init.d/dump.rdb
-rw-rw-r-- 1 wuser wuser 18 May  4 23:58 /home/wuser/dump.rdb
-rw-r--r-- 1 root  root  18 May  4 23:54 /dump.rdb
root@ubuntu:/etc/init.d# cp /var/lib/redis/dump.rdb /var/lib/redis/BEFOREdump.rdb
root@ubuntu:/etc/init.d# redis-cli
127.0.0.1:6379> KEYS *
1) "w2d"
2) "w2"
127.0.0.1:6379> flushall
OK
127.0.0.1:6379> exit
root@ubuntu:/etc/init.d# find / -name dump.rdb |xargs ls -alt
-rw-r--r-- 1 redis redis 18 May  5 07:38 /var/lib/redis/dump.rdb
-rw-r--r-- 1 root  root  18 May  5 06:59 /etc/redis/dump.rdb
-rw-r--r-- 1 root  root  18 May  5 06:55 /etc/init.d/dump.rdb
-rw-rw-r-- 1 wuser wuser 18 May  4 23:58 /home/wuser/dump.rdb
-rw-r--r-- 1 root  root  18 May  4 23:54 /dump.rdb
root@ubuntu:/etc/init.d# redis-cli
127.0.0.1:6379> keys *
(empty list or set)
127.0.0.1:6379> exit
root@ubuntu:/etc/init.d# ./redis-server stop
[ ok ] Stopping redis-server (via systemctl): redis-server.service.
root@ubuntu:/etc/init.d# cp /var/lib/redis/BEFOREdump.rdb /var/lib/redis/dump.rdb 
root@ubuntu:/etc/init.d# ./redis-server start
[ ok ] Starting redis-server (via systemctl): redis-server.service.
root@ubuntu:/etc/init.d# redis-cli
127.0.0.1:6379> keys *
1) "w2"
2) "w2d"
127.0.0.1:6379> exit
root@ubuntu:/etc/init.d# find / -name dump.rdb |xargs ls -alt
-rw-r--r-- 1 redis redis 35 May  5 07:40 /var/lib/redis/dump.rdb
-rw-r--r-- 1 root  root  18 May  5 06:59 /etc/redis/dump.rdb
-rw-r--r-- 1 root  root  18 May  5 06:55 /etc/init.d/dump.rdb
-rw-rw-r-- 1 wuser wuser 18 May  4 23:58 /home/wuser/dump.rdb
-rw-r--r-- 1 root  root  18 May  4 23:54 /dump.rdb
root@ubuntu:/etc/init.d# 

w

https://redis.io/topics/replication