data backup solution
(1) Write crontab schedule script to do data backup
(2) Copy a backup of rdb every hour, go to a directory, and keep only the backup of the last 48 hours
(3) Keep a backup of the rdb of the day every day, go to a directory, and only keep the backup of the last month
(4) Every time you copy a backup, delete the backup of the earliest day | January
(5) Back up all the data on the current server every night and send a copy to the remote cloud service
Environment Description:
scene 1:
Copy backups every hour and delete data older than 48 hours
crontab -e
0 * * * * /usr/local/redis/sh/redis_rdb_copy_hourly.sh
Redis_rdb_copy_hourly.sh file content:
#!/bin/sh cur_date=`date +%0Y%0m%0d%0k` rm -rf /usr/local/redis/bak/$cur_date mkdir /usr/local/redis/bak/$cur_date cp /usr/local/redis/data/dump.rdb /usr/local/redis/bak/$cur_date del_date=`date -d -48hour +%0Y%0m%0d%0k` rm -rf /usr/local/redis/bak/$del_date
Scenario 2:
Copy a backup every day and delete the data of the previous month
crontab -e
0 0 * * * /usr/local/redis/sh/redis_rdb_copy_daily.sh
Redis_rdb_copy_daily.sh file content:
#!/bin/sh cur_date=`date +%0Y%0m%0d` rm -rf /usr/local/redis/bak/$cur_date mkdir /usr/local/redis/bak/$cur_date cp -r /usr/local/redis/data/dump.rdb /usr/local/redis/bak/$cur_date del_date=`date -d -1month +%0Y%0m%0d` rm -rf /usr/local/redis/bak/$del_date
Note: You can also use scp to copy the files that have been backed up to this machine to other servers to prevent the failure of the local hard disk
Scenario 3:
冷备数据恢复，在reids已停止对外服务的情况下，并且RDB和AOF都开启：
1、配置文件关闭aof，即：appendonly no
2、删除aof文件，拷贝（覆盖）备份的rdb文件，启用redis，此时数据已恢复
3、动态开启aof，即：config set appendonly yes，待自动生成aof文件（如果不自动生成，可调用bgrewriteaof命令触发），完成数据的重写
4、修改配置文件开启aof，启动redis