When comparing Questdb vs KairosDB, the Slant community recommends Questdb for most people. In the question“What are the best time-series databases and/or data stores?” Questdb is ranked 5th while KairosDB is ranked 6th. The most important reason people chose Questdb is:
Very fast query and inset speeds for really large data sets of time series data.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Super fast ingest and query speed
Very fast query and inset speeds for really large data sets of time series data.
Pro SQL Queries
Query with SQL. No specialized TSDB query language needed.
Pro Fast setup and easy migration from InfluxDB
Native InfluxDB Line Protocol and Grafana via Postgres Wire make it easy to switch.
Pro Apache Cassandra provides fast, efficient, and highly reliable storage
KairosDB primary storage backend is Apache Cassandra. Cassandra is one of the biggest player in NoSQL world, supported by Datastax and used by large companies such as Netflix.
Pro Open source
KairoDB is licensed under Apache License with source code available on GitHub.
Pro High modularity
Extending KairosDB is very easy.
Software is based on Guice modules and all parts can be extended using modules: aggregations, query engines, webservice APIs.
Pro Multi apis
Accessible through Rest, Telnet, and Graphite.