How does Redis handle data persistence and recovery?

How does Redis handle data persistence and recovery?

Redis offers two main persistence options: RDB snapshots and AOF (Append Only File). RDB saves snapshots at specified intervals, while AOF logs every write operation.

What are the advantages of using AOF over RDB?

AOF provides better durability since it logs every operation, allowing for more granular recovery. However, it can be slower than RDB.

Can I use both RDB and AOF together?

Yes, you can configure Redis to use both RDB and AOF for enhanced data safety. This way, you benefit from the strengths of both methods.

What happens if Redis crashes?

If Redis crashes, recovery depends on your persistence configuration. With AOF, it can replay the log to restore data, while RDB will restore the last snapshot.

How can I configure Redis for optimal persistence?

You can adjust the save intervals for RDB and the fsync policy for AOF in the Redis configuration file to optimize for your use case.