Yes, ApsaraDB for Redis supports Bloom filters. A Bloom filter is used to determine whether an element exists in a data set. Bloom filters are suitable for scenarios such as cache penetration prevention and the use of web interceptors.

Bloom filters are supported by performance-enhanced instances of the ApsaraDB for Redis Enhanced Edition (Tair). For more information about performance-enhanced instances, see DRAM-based instances. For more information about Bloom filters supported by performance-enhanced instances, see TairBloom commands. Performance-enhanced instances also integrate multiple Redis modules developed by Alibaba Cloud. These modules include TairString (including CAS and CAD commands), TairHash, TairGIS, TairBloom, TairDoc, TairTS, TairCpc, TairZset, TairRoaring, TairVector, and TairSearch. These modules facilitate development in sophisticated scenarios and allow you to focus on business innovation.

Warning Bloom filter-related API operations such as BF.ADD supported by existing instances of ApsaraDB for Redis 4.0 are only for internal use. These operations are no longer supported by instances of major versions later than 4.0 and newly purchased instances of ApsaraDB for Redis 4.0. As such, if you call the operations on these instances, unknown errors such as failed cache analytics may take place. We recommend that you change your instance into a performance-enhanced instance of the ApsaraDB for Redis Enhanced Edition (Tair) that supports optimized Bloom filters. For more information about performance-enhanced instances, see DRAM-based instances.