Tag
pre-aggregation
- Mar 27, 2026 Recording Rules, Pre-Aggregation, and the Cost of Evaluating at Read Time Why the same query evaluated per-panel at render time multiplies work by viewers, how a pre-aggregated rule trades flexibility for a bounded cost, and what staleness the rule introduces. observability
- May 14, 2024 Pre-Aggregating Map Output with Combiners The associativity contract a combiner must satisfy, where the framework applies it, and how much shuffle volume it removes when key cardinality is low. data engineering