GreptimeDB
An open-source observability database for metrics, logs, and traces that can be queried with SQL over the MySQL protocol.
GreptimeDB stores metrics, logs, and traces in one engine and answers queries in SQL and PromQL. It exposes a MySQL protocol endpoint, so MySQL clients can connect and run SQL against observability data.
It’s written in Rust. GreptimeDB is open core: the core is released under the Apache 2.0 license, and a small set of enterprise-only features is gated separately.
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