QuestDB is an open-source SQL database for time series data.
It uses a column-oriented approach and supports heavy parallelized vectorized execution using SIMD instructions.
QuestDB implements SQL and augments it for time-series with native extensions. It exposes a Postgres wire protocol, and supports ingestion with InfluxDB Line Protocol.
Decomposition Storage Model (Columnar)
QuestDB uses a column-based storage model. Data is stored in tables with each column stored in its own file and its own native format. New data is appended to the bottom of each column to allow data to be organically retrieved in the same order that it was ingested.
https://github.com/questdb/questdb
https://questdb.io/docs/introduction/
QuestDB
2013
C, C++, Go, Java, JavaScript, Python, R, Rust, SQL