Usually you start by some functional sharding (giving each team of services their own Prometheus servers), but also having per-datacenter Prometheus servers and

Usually you start by some functional sharding (giving each team of services their own Prometheus servers), but also having per-datacenter Prometheus servers and then some hierarchical federation layer ontop of that. There's no built-in automatic horizontal scaling though (which would be going against the design goal of not having a clustered system, for reliability). Some resources: - Scaling in general: http://www.robustperception.io/scaling-and-federating-prometheus/ http://www.robustperception.io/scaling-and-federating-promet... - Federation: https://prometheus.io/docs/operating/federation/ https://prometheus.io/docs/operating/federation/