What is Redis persistence and how does it work?

Redis persistence allows saving in-memory data to disk using RDB snapshots or AOF logs.

Redis provides two persistence mechanisms: RDB (snapshotting) and AOF (append-only file). RDB saves the dataset at intervals, while AOF logs every write operation. RDB is faster but less durable, while AOF is more reliable but slower. They can be used together for better durability.