507 B
507 B
Quotas, backpressure, and DLQ (NR4)
- Per-tenant quotas: 500 deliveries/minute default; channel overrides: webhook 200/min, email 120/min, chat 240/min.
- Burst budget: 2x quota for 60 seconds, then hard clamp.
- Backpressure: reject enqueue when backlog > quota*10 or DLQ growth > 5%/min.
- DLQ schema:
docs/modules/notify/schemas/dlq-notify.schema.json; redrive requires idempotentdelivery_id/dedupe_key. - Metrics to alert: backlog depth, DLQ depth, redrive success rate, enqueue reject count.