Amazon ElastiCache now supports Bloom filters as a new data type in ElastiCache version 8.1 for Valkey and above. Bloom filters are a space efficient probabilistic data structure that lets you quickly check whether an item is possibly in a set. This new feature is fully compatible with the valkey-bloom module and API compatible with the Bloom filter command syntax of the Valkey client libraries, such as valkey-py, valkey-java, and valkey-go. Previously, to find whether elements were added to your cache, you used the Set data type to write items to a set and then check if that item already existed. Bloom filters achieve the same outcome using a probabilistic approach and are over 98% more memory efficient than using sets without compromising performance.
Bloom filters are available today in Amazon ElastiCache version 8.1 for Valkey in all AWS Regions and for serverless and node-based offerings at no additional cost. To learn more about Bloom filters on ElastiCache for Valkey, check out the ElastiCache documentation. For the full documentation and list of supported commands, see the Bloom filter documentation.
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Source: Amazon Web Services
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