redis 数据导入导出，实例内db迁移

源实例db0迁移至目标实例db1

 [root@172.20.0.1 ~]# cat redis_mv.sh
 #!/bin/bash
 redis-cli -h 172.20.0.1 -p  -a password -n  keys "*" | while read key
 do
     redis-cli -h 172.20.0.1 -p  -a password -n  --raw dump $key | perl -pe 'chomp if eof' | redis-cli -h 172.20.0.2 -p  -a password -n  -x restore $key
     echo "migrate key $key"
 done

aof导入方式：

1.源实例生成aof数据

 # 清空上文目标实例全部数据
 [root@172.20.0.1 ~]# redis-cli -h 172.20.0.2 -a password flushall
 OK
 # 源实例开启aof功能，将在dir目录下生成appendonly.aof文件
 [root@172.20.0.1 ~]# redis-cli -h 172.20.0.1 -a password config set appendonly yes
 OK

2.目标实例导入aof数据

 # 假设appendonly.aof就在当前路径下
 [root@172.20.0.1 ~]# redis-cli -h 172.20.0.2 -a password --pipe < appendonly.aof
 All data transferred. Waiting for the last reply...
 Last reply received from server.
 errors: , replies:
 # 源实例关闭aof功能
 [root@172.20.0.1 ~]# redis-cli -h 172.20.0.1 -a password config set appendonly no
 OK