{"id":"hash-mod-skew-shared-across-modules","text":"Three modules use the same `hash(k) % num_partitions` pattern with fixed partition counts and no hot-key mitigation: `mapreduce.py:109`, `secondary_index_partitioning.py:56`, and `partitioned_log.py:149` — all share the straggler vulnerability where a single hot key overwhelms one partition","truth_value":"IN","source":"entries/2026/05/29/topic-hash-partitioning-skew.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"hash-mod-skew-shared-across-modules","truth_value":"IN","reason":"premise"}]}}