Robuta

https://www.databricks.com/blog/2019/05/08/advanced-analytics-with-apache-spark.html
In this blog, we introduce the advanced HyperLogLog functionality of the open-source library spark-alchemy and explore how it addresses data aggregation...
apache sparkadvancedanalyticshyperloglogfunctions
https://github.com/aaw/hyperloglog-redis
An implementation of the HyperLogLog algorithm backed by Redis - aaw/hyperloglog-redis
the algorithmgithubaawhyperloglogredis