[druid-user] [ANNOUNCE] Apache Druid 0.22.0 release

The Apache Druid team is proud to announce the release of Apache Druid 0.22.0.
Druid is a high performance analytics data store for event-driven data.

Apache Druid 0.22.0 contains over 400 new features, performance
enhancements, bug fixes, and documentation improvements from 73
contributors. Major new features and improvements include:

- Support for number formatting and bitwise operations
- Support for ARRAY_AGG and STRING_AGG SQL aggregators
- Improved batch ingestion memory usage
- Support for using deep storage for native batch shuffle storage
- Experimental task autoscaling for Apache Kafka and Amazon Kinesis
based streaming ingestion
- Apache Avro and Protobuf streaming 'InputFormat' implementations,
and improved support of Confluent Schema Registry
- Improvements to both manual and automatic compaction
- Automatic cleanup of metadata storage

Source and binary distributions can be downloaded from:
https://druid.apache.org/downloads.html

Release notes are at:

A big thank you to all the contributors in this milestone release!