BTrDB vs KairosDB
BTrDB
btrdb.readthedocs.ioKairosDB
kairosdb.github.ioSide by side
| Figure | BTrDB | KairosDB |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 0 |
| Spec score · Time-Series Databases | 8.8 (#3) | 7.3 (#31) |
| License | The BTrDB server repository identifies its license as MIT. | The repository identifies the license as Apache License 2.0. |
| Product | BTrDB is a time-partitioned, version-annotated clustered time-series database for high-density univariate data. | KairosDB is a distributed time-series database built on Cassandra. |
| Security | The documentation describes TLS access on port 4411 and API-key authentication, which requires the TLS port. | The KairosDB pages reviewed do not state security certifications or compliance claims. |
| Support | The documentation invites users to submit pull requests or open a GitHub issue for additions or corrections. | The project README directs users to a KairosDB discussion group for questions and community involvement. |
Plans
In their own words
BTrDB
BTrDB is a free, MIT-licensed, self-hosted time-series database for dense, high-precision univariate data. It partitions data by time, supports clustered deployments, and records stream changes as new versions that queries can target. Streams have unique UUIDs and can be grouped into collections with tags and annotations. The Python btrdb package supports nanosecond-timestamp queries and insertion through Stream.insert, PyArrow tables, or pandas DataFrames. Statistical queries can return minimum, maximum, mean, count, and standard deviation without reading every underlying point. StreamSets can be filtered and converted to pandas DataFrames or CSV files. Documentation shows Dash and Plotly visualization, Ray-worker serialization, TLS on port 4411, and API-key authentication requiring that TLS port. Arrow-based tabular methods are documented for commercial customers with Arrow-enabled servers. BTrDB reports measured cluster throughput and compression figures, and describes smart-grid aggregation at city or country scale as one target use case.
KairosDB
KairosDB has no write-up on Specifiction yet; its figures are above.