apache/druid

Apache Druid is a distributed, columnar, real-time analytics database designed for high-performance data ingestion and interactive querying. The system supports a wide variety of data sources, including Kafka, Kinesis, HDFS, S3, and various cloud storage backends, while offering flexible storage options such as S3, GCS, Cassandra, and SQL databases. It provides extensive aggregation capabilities through DataSketches, Bloom filters, and histogram aggregations, enabling fast approximate and exact statistical analysis. Additionally, the platform features a comprehensive security model with LDAP and database-backed authentication, role-based authorization, and support for Kerberos and JWT-based access control.

This period focused on hardening the platform with comprehensive security features, including basic authentication, LDAP support, and Kerberos integration. It also expanded data handling capabilities by adding support for diverse storage backends like PostgreSQL, Cassandra, and S3, while introducing advanced statistical aggregations via DataSketches and histogram extensions.

93 changes

This period focused on expanding cloud storage support by adding extensions for Google Cloud Storage, Aliyun OSS, and HDFS, alongside new aggregators like Bloom Filters and t-digest sketches. The release also introduced significant security enhancements, including LDAP and OIDC authentication, while providing comprehensive configuration templates and Docker setups for easier deployment.

50 changes

This period focused on expanding Druid's ecosystem by introducing new connectors for Iceberg, Delta Lake, and RabbitMQ, alongside advanced aggregation types like compressed BigDecimals and DDsketches. Concurrently, the project significantly enhanced observability through OpenTelemetry and Prometheus integrations, while establishing a robust testing infrastructure with Docker-based containers and SQL-level validation tools.

46 changes

apache/druid was measured the same way every project in this corpus was: the same rubric, at a pinned commit, with the result published in full. Point the surveyor at a repository you know and see whether you agree with it.