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Part 4: In-Memory Caching & Fast Data Stores (Redis) (41 - 50)

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Databases & System Design•Part 4: In-Memory Caching & Fast Data Stores (Redis) (41 - 50)

Redis Persistence: RDB vs AOF:

In Simple Words:

  • RDB: Point-in-time binary snapshots. Fast restarts, but risks losing recent minutes of data.
  • AOF: Append-only log of every write command. High durability, but larger file size. Production standard: Combine both.
ini
# Production persistence settings in redis.conf:
save 900 1            ; Snapshot if 1 key changed in 15 mins
appendonly yes        ; Enable AOF
appendfsync everysec  ; Flush WAL log to disk every 1 second
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Redis Sliding Window Rate Limiter: