# Grafana Cloud
All Grafana Cloud notes →Chapter 1 — Grafana Mimir
Mimir's architecture, remote-write ingestion, storage, high availability, replication, and retention as Grafana Cloud's horizontally-scalable metrics backend.
grafana-cloud metrics-mimir book
Chapter 2 — PromQL
Instant and range queries, functions, aggregations, histograms, recording rules, and query optimization for querying Mimir-backed metrics.
grafana-cloud metrics-mimir book
Chapter 3 — Metrics Management
Label strategy, cardinality management, Adaptive Telemetry, and cost/performance best practices for keeping a metrics pipeline sustainable at scale.
grafana-cloud metrics-mimir book