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Redis · Concept

Bloom filter

Redis Bloom filters provide compact, fast membership checks. A negative result is certain, but a positive result may be a false positive.

Last updated

Since
1.0.0

Syntax

BF.RESERVE key error_rate capacity [EXPANSION expansion] [NONSCALING]
BF.ADD key item
BF.EXISTS key item
BF.MADD key item [item ...]
BF.MEXISTS key item [item ...]

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  • BF.RESERVE
  • BF.ADD
  • BF.EXISTS
  • BF.MADD
  • BF.MEXISTS
  • BF.CARD
  • BF.INFO
  • BF.INSERT

Source: Bloom filter. Checked 2026-11-03.