KairosDB

Spec sheet

Purpose

KairosDB is a fast, distributed, scalable time-series database built on Cassandra.Read 11 Oct 2026 · github.com

Product

KairosDB is a distributed time-series database built on Cassandra.Read 5 Oct 2026 · kairosdb.github.io

Deployment

The documentation says KairosDB runs under Kubernetes and is mostly stateless, while Cassandra can be harder to run efficiently there.Read 11 Oct 2026 · kairosdb.github.io

Security

The KairosDB pages reviewed do not state security certifications or compliance claims.Read 5 Oct 2026 · kairosdb.github.io

Support

The project README directs users to a KairosDB discussion group for questions and community involvement.Read 5 Oct 2026 · github.com

License

The repository identifies the license as Apache License 2.0.Read 11 Oct 2026 · github.com

Aggregators

Available aggregation functions include min, max, sum, count, and mean.Read 11 Oct 2026 · kairosdb.github.io

Data collection

It accepts data through Telnet, REST, Graphite, and plugins.Read 5 Oct 2026 · kairosdb.github.io

Data ingestion

Data can be submitted through Telnet, REST, Graphite, or plugins.Read 11 Oct 2026 · kairosdb.github.io

Extensibility

Guice-based plugins can add data point listeners, data stores, and protocol handlers.Read 11 Oct 2026 · kairosdb.github.io

Import and export

The server provides command-line tools to import and export data.Read 5 Oct 2026 · kairosdb.github.io

Java client

KairosDB provides a Java client library using HttpClient to send metrics and query the server.Read 11 Oct 2026 · kairosdb.github.io

Notable configuration limit

The Cassandra row width can be changed when the schema is created, but not afterward.Read 11 Oct 2026 · kairosdb.github.io

Notable limit

The Cassandra row width defaults to about three weeks and cannot be changed after the schema is created without risking data loss.Read 5 Oct 2026 · kairosdb.github.io

Queries

The REST API supports querying by metric and time range, with optional tags, aggregation, averaging, min and max calculations, and downsampling.Read 11 Oct 2026 · kairosdb.github.io

Requirements

The installation guide says KairosDB runs with Java 1.8 or later.Read 5 Oct 2026 · kairosdb.github.io

Runtime requirement

KairosDB runs with Java 1.8 or later.Read 11 Oct 2026 · kairosdb.github.io

Storage backends

KairosDB can use an in-memory H2 database or Cassandra to store data points.Read 11 Oct 2026 · kairosdb.github.io

Web interface

A default install serves a browser-based query page that the documentation describes as designed primarily for development.Read 11 Oct 2026 · kairosdb.github.io

Where Specifiction places it

• Time-Series Databases#31 of 367.3