Database persistence of two implementations

Database services in the persistent data storage, data backup can do both, but also aspects of data transmission.

There are two main ways:

A. Create a snapshot

Mysql snapshot
of Mysql dump tool, you can export data to a .sql file by this sql file, it can be used for data recovery.

$ mysqldump -h xxx -uroot -p databasename > ~/data_backup/database.sql 

Redis of rdb
Redis client Transmit save / bgsave instruction, creates rdb file

127.0.0.1:6379> save
127.0.0.1:6379> bgsave

II. Record writes logs (inset / update / delete)

Mysql's binlog

Redis of aof