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ASF GitHub Bot commented on METRON-627: --------------------------------------- Github user ottobackwards commented on the issue: https://github.com/apache/incubator-metron/pull/397 In that case, we should have multiple concise README's with more detail and a top level overview readme > Add HyperLogLogPlus implementation to Stellar > --------------------------------------------- > > Key: METRON-627 > URL: https://issues.apache.org/jira/browse/METRON-627 > Project: Metron > Issue Type: Improvement > Reporter: Michael Miklavcic > > Calculating set cardinality can be a useful tool for a security analyst. For > instance, a large volume of non-unique src ip addresses hitting your network > may be an indication that you are currently under attack. There have been > many advancements in distinct value (DV) estimation over the years. We have > seen implementations evolve from K-Minimum-Values (KMV), to LogLog, to > HyperLogLog, and now to Google's much-improved HyperLogLogPlu algorithm. The > key improvements in this latest manifestation of the algorithm are: > moves to a 64-bit hash > handles sparse sets > is more accurate with small cardinality > This Jira tracks the effort to add a HyperLogLogPlus implementation to Metron. > References: > https://research.neustar.biz/2013/01/24/hyperloglog-googles-take-on-engineering-hll/ > http://static.googleusercontent.com/media/research.google.com/en//pubs/archive/40671.pdf -- This message was sent by Atlassian JIRA (v6.3.4#6332)