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Database Entry

Hydra

Abandoned Failed Company OLAP

Hydra is a data warehouse using PostgreSQL as its frontend and Citus' c-store extension for columnar storage.

Website
https://hydra.so[01]
Source Code
https://github.com/hydradatabase/columnar[02]
Tech Docs
https://docs.hydras.io[03]
Twitter
@HydrasDB
Developer
Country of Origin
CA
Start Year
2022 [04]
End Year
2025 [05]
Project Types
Commercial, Open Source
Written in
C
Derived From
Citus, PostgreSQL
Operating Systems
Hosted, Linux
Licenses
AGPL v3, Apache v2

Database Entry

Hydra

Abandoned Failed Company OLAP

Hydra is a data warehouse using PostgreSQL as its frontend and Citus' c-store extension for columnar storage.

Data Model

Relational

Query Execution

Vectorized Model

Query Interface

SQL

Storage Architecture

Disk-oriented

Storage Model

Decomposition Storage Model (Columnar)

System Architecture

Shared-Everything
People Also Viewed
AlloyDB AlloyDB ParadeDB ParadeDB Citus Citus ParAccel ParAccel

Citations

5 sources
  1. https://hydra.so hydra.so Dead — Check Archive
  2. GitHub - hydradatabase/columnar: Postgres-native columnar storage extension · GitHub github.com
  3. https://docs.hydras.io hydras.io Dead — Check Archive
  4. Add build script for Spilo image github.com
  5. Databases in 2025: A Year in Review // Blog // Andy Pavlo - Carnegie Mellon University cmu.edu
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