Apache Druid 0.18 released

About Apahce Druid

Druid is a distributed data processing system that supports real-time multi-dimensional OLAP analysis. It not only supports high-speed data real-time ingest processing, but also supports real-time and flexible multi-dimensional data analysis and query. Therefore, Druid's most common scenario is flexible and fast multi-dimensional OLAP analysis in the context of big data. In addition, Druid also has a key feature: it supports pre-aggregation ingestion and aggregation analysis of data based on timestamps, so some users often use it in scenarios with time-series data processing and analysis.

This important update

Join support

Druid started to support Join query. Join is one of the important features of the database. After joining Join, the query method will be simpler.

Inline query

       topN
               |
       (join datasource)
         /          \
(table datasource)  groupBy

Query channel and priority

New configuration

druid.server.http.maxSubqueryRows 

The configuration controls the maximum number of rows implemented in Broker memory.

support for Java 11

Can run on Java 11.

Update information: https://github.com/apache/druid/releases/tag/druid-0.18.0