Where do you store metrics?

Metrics are usually stored in time series databases (Time Series Databases, TSDB).

The most common options:

• Prometheus: An open TSDB, widely used in cloud environments. It has a powerful query language (PromQL).
• InfluxDB: Another popular open-source TSDB optimized for storing and processing metrics and events.
• Opensearch (formerly Elasticsearch): Although not exclusively a TSDB, it is often used for storing and analyzing logs that may contain metric data.
• Graphite: Historically a predecessor to Prometheus, also designed for storing metrics.

The choice depends on the system scale, required detail, budget, and team preferences.

# Example Prometheus configuration for metric collection
scrape_configs:
  - job_name: 'node'
    static_configs:
      - targets: ['localhost:9100'] # Target for metric collection