hll stands for https://en.wikipedia.org/wiki/HyperLogLog
You will not get the exact distinct count, but a distinct count very close to the real number. It is very fast and memory efficient for large number of distinct values. > Am 10.03.2020 um 00:25 schrieb Nicolas Paris <nicolas.pa...@riseup.net>: > > > Erick Erickson <erickerick...@gmail.com> writes: >> Have you looked at the HyperLogLog stuff? Here’s at least a mention of >> it: https://lucene.apache.org/solr/guide/8_4/the-stats-component.html > > I am used to hll in the context of count distinct values -- cardinality. > > I have to admit that section > https://lucene.apache.org/solr/guide/8_4/the-stats-component.html#local-parameters-with-the-stats-component > is about hll and facets, but I am not sure that really meet the use > case. I also have to admit that part is quite cryptic to me. > > > -- > nicolas paris
