Practical t-digest Applications

Search
06/01/2015 -
14:30 to 14:50
Stage 1
short talk (20 min)
Intermediate

Session abstract: 

The t-digest is a state-of-the-art algorithm for computing approximate quantiles with adjustable accuracy limits and very few limitations.

Implementations of t-digest algorithm are easy to use and have been integrated in all kinds of software from ElasticSearch to Apache Mahout. Certain kinds of queries such as finding the top 99.999th %-ile can be accelerated by several orders of magnitude by using t-digest.

I will describe the basic algorithm and demonstrate the effect of some variations of the algorithm. I will also show how to use the algorithm in your code or your queries.

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