Compare Redis persistence options: RDB vs AOF.

Redis offers two persistence mechanisms: **RDB (Redis Database Backup):** # Configuration save 900 1 # save if 1 key changed in 900 seconds save 300 10 # save if 10 keys changed in 300 seconds save 60 10000 # save if 10000 keys changed in 60 seconds # Manual snapshot BGSAVE # background save SAVE # blocking save **Pros:** Compact, fast recovery, good for backups **Cons:** Data loss possible, CPU intensive during saves **AOF (Append Only File):** # Configuration appendonly yes appendfsync everysec # fsync every second # appendfsync always # fsync every command (slow) # appendfsync no # let OS decide # AOF rewrite BGREWRITEAOF **Pros:** Better durability, readable format **Cons:** Larger files, slower recovery **Hybrid Approach:** # Use both for maximum safety save 900 1 appendonly yes appendfsync everysec **When to Use:** • RDB only: Backup scenarios, can tolerate data loss • AOF only: Need durability, can't lose data • Both: Production systems requiring high availability