Make Data in Redis More Durable With The Append-Only File
Problem
You want to increase the durability of your data in Redis.
Solution
Use Redis' built-in append-only file (AOF).
Edit the Redis configuration file redis.conf to include the line:
appendonly yes
Redis will now add every command to the AOF. If the server should crash, you will be able to rebuild state from this file. It works in a very similar fashion to the log files common in other databases, such as MySQL's binlog.
Discussion
The AOF itself is configurable. There are three different options, each with their own particular
tradeoff between durability and speed. These configurations can be set in redis.conf.
The three options are to force a sync every command, sync every second, or never force a sync (that is, leave the process up to the operating system). Redis' default is the sync on every command; however, this will be quite slow. The second option is usually a fair trade-off between safety and speed.