Fast IoT Stack with QuestDB, MQTT, and Telegraf

QuestDB is an open-source time-series database designed for high-performance applications like trading floors and mission control, offering ultra-low latency, high ingestion throughput, and a multi-tier storage engine with native Parquet and SQL support. Shan Desai, a software engineer at Emerson Discrete Automation, provides a tutorial on deploying QuestDB for IoT applications using a repository called "Questitto," which simplifies the setup of a stack involving Telegraf, InfluxDB, Grafana, and Mosquitto MQTT Broker. The tutorial includes details on user authentication, data ingestion, and configuration using Docker, emphasizing the use of SQL queries and dynamic timestamping features. It demonstrates how to extract sensor data using MQTT topics and manage data insertion into QuestDB without needing a predefined schema. Additionally, it highlights the ease of visualizing data through QuestDB's UI and offers tips for managing configurations without disrupting the stack.