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… (agg_id,key) Document WHY the monitor identity differs: a point estimate's error is bounded by the sketch NORM (CMS: f̂(x)≤f(x)+ε‖f‖₁; Count-Sketch: |f̂(x)−f(x)|≤ε‖f‖₂), so when the queried point is NOT known a priori (ad-hoc point queries) you must bound the whole-sketch norm — one CDM per sketch, keyed by agg_id, sampling on the edge's whole local norm ‖f_i‖ (f2::DistributedF2Monitor). cms_point's (agg_id,key) is only for a PRE-DECLARED standing alert on a specific x, never to back a general query surface. Notes the CDM/OctoSketch (whole-sketch) vs Cormode (single-function) framing and maps geometric safe-zone ↔ slack countdown to the two cases. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Superseded by the sampling unification (branch |
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Adds the decision rule to
monitor/mod.rs: a point estimate's error is bounded by the sketch norm, so when the queried point isn't known a priori (ad-hoc point queries) you must monitor/sample on the whole-sketch norm — one CDM per sketch, keyed byagg_id, sampling on the edge's whole local norm‖f_i‖(f2::DistributedF2Monitor).cms_point's(agg_id,key)is only for a pre-declared standing alert on a specificx, never to back a general query surface. Includes the CDM/OctoSketch (whole-sketch) vs Cormode (single-function) framing.Follow-up doc to #378. No code change.
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