Architecture

When to stop scaling horizontally and re-architect.

A practitioner's reading of the three load patterns that mean the cluster has run out of road and the workload needs a different shape, not more nodes.

Platform Engineering 13 min read

Not every scaling problem is solved by more nodes. Three patterns tell you the workload has run out of horizontal road.

  • Tail latency climbing while median stays flat — you have shard hot-spots, not capacity issues
  • Cross-service fan-out multiplying with each new tenant — the topology, not the scale, is the ceiling
  • Cache warm-up cost dominating the recovery budget — the working set no longer fits the shape you designed for

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