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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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xtdb
An immutable database for application development and time-travel data compliance, with SQL and XTQL. Developed by @juxt
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
As XT is written in Clojure and it natively supports Clojure’s data types, we were not satisfied with available JSON types and decided to give EDN a try - that way we would have way more supported types:
However, we had some issues with encoding Elixir/BEAM VM terms to EDN and, in general, the performance of the format - so the Transit/JSON would be an improvement as apart from being compatible with regular JSON and essentially more performant it also has a more precise types conversion.
However, not every Elixir’s HTTP client supports sending requests using HTTP2 - so we have to search for another option rather than using HTTPoison that we widely use in other projects. We’ve decided to go with Finch, as apart from supporting HTTP2 it also focuses on performance and provides telemetry support out of the box - which we’ve found very useful for tracing and debugging purposes.
In Elixir are using Eden library in order to decode and encode data from and to EDN format. In most cases it works without any issues, however, for decimals we had to implement protocol support for Elixir Decimal type:
XTDB, or Cross-Time Database, is a distributed and transactional database system designed to handle complex and changing data with ease. It is based on a bitemporal model, which allows for the tracking of both the valid time and transaction time of data, enabling powerful and flexible querying capabilities. With XTDB, developers can work with immutable data structures, which simplifies development and improves reliability. Its graph query language, Datalog, provides a powerful and expressive way to navigate relationships within the data.