documentation/introduction.md
import { Guides } from "../src/components/Guides" import { Resources } from "../src/components/Resources" import { HeroPattern } from "../src/components/HeroPattern" import { DocButton } from "../src/components/DocButton"
QuestDB is an open source time-series database engineered for low latency. It uses a column-oriented, time-partitioned storage engine with memory-mapped files and vectorized (SIMD) execution to support high-throughput ingestion and millisecond-level analytical queries. The system is built from scratch with a zero-GC Java core and focused C++/Rust components, in a compact codebase optimized for cache locality and predictable tail latency. SQL is extended with time-series operators such as SAMPLE BY, LATEST ON, ASOF JOIN, and WINDOW JOIN. See Architecture for details.
<DocButton href="https://demo.questdb.io" variant="outline" style={{ marginRight: '20px' }}> <>Live demo</> </DocButton>
<DocButton href="https://questdb.com/quiz/" variant="outline"> <>Test your skills</> </DocButton> </div>This documentation covers both QuestDB Open Source and QuestDB Enterprise.
QuestDB Enterprise builds on top of QuestDB Open Source, using it as its core library. Everything in open source works in Enterprise, but not the other way around. Enterprise adds features like high availability, advanced security, RBAC, automated backups, and multi-tier storage with seamless object storage integration.