Time-Series Databases: InfluxDB and Prometheus

Imagine you are tracking temperature from 1,000 sensors every second. That's 86 million records a day. MySQL will choke.

Characteristics of Time-Series Data

1. High Write Volume: Append-only. No updates.
2. Time-Centric Queries: "Give me average temp for the last hour".
3. Data Retention: "Delete data older than 30 days".

InfluxDB & Prometheus

These databases are optimized for exactly this.

• Compression: They use specialized algorithms (like Gorilla) to compress similar floating-point numbers, reducing storage by 90%.
• Downsampling: Automatically convert "1-second resolution" data to "1-minute resolution" after a week to save space.

Essential for DevOps monitoring, Crypto trading, and IoT.