• Apache Druid vs Kudu
• Apache Druid vs Spark
• Authentication and Authorization
• Coordinator Process
• Indexer Process
• MiddleManager Process
• Router Process
• Approximate Histogram aggregators
• Microsoft Azure
• DataSketches extension
• DataSketches Quantiles Sketch module
• Basic Security
• Cached Lookup Module
• Google Cloud Storage
• Apache Kafka Lookups
• MySQL Metadata Store
• Druid pac4j based Security extension
• PostgreSQL Metadata Store
• S3-compatible
• Stats aggregator
• Druid AWS RDS Module
• Ambari Metrics Emitter
• DistinctCount Aggregator
• InfluxDB Line Protocol Parser
• Kafka Emitter
• Moment Sketches for Approximate Quantiles module
• OpenTSDB Emitter
• Microsoft SQLServer
• T-Digest Quantiles Sketch module
• Timestamp Min/Max aggregators
• Aliyun OSS
• kubernetes
• Select