Show HN: Pg_deltax, Apache-licensed alternative to TimescaleDB

Category: database

Tags: postgresql, time-series, compression, columnar-storage, rust

Score: 7.5/10 (Innovation: 7, Technical: 9, Documentation: 7, Utility: 7)

DeltaX is a PostgreSQL extension written in Rust that provides columnar compression and fast querying for time-series data, acting as an open-source alternative to TimescaleDB. It uses per-column codecs like Gorilla XOR and delta-of-delta encoding, stores compressed data in standard Postgres tables for full compatibility with replication and backups, and implements segment pruning and vectorized filters for analytical performance. The project is technically impressive for its custom compression algorithms and tight integration with PostgreSQL internals.

Target audience: backend devs, data engineers, devops

Repository: https://github.com/xataio/deltax · Rust · Apache-2.0 · 18 stars

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