Add exhaustive NATS factorial, MQTT/UDP probes, and optimal-config report.
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Compares r=1 vs r=3, file vs memory, reconnect tax, and projects three HP DL360 Gen10 NVMe + 10GbE boxes. Keep NATS; do not switch to MQTT/UDP.
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# Action log
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## 2026-09-12 — exhaustive optimal-config study
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- 8c/16G ZFS factorial: file/memory × r=1/r=3, 4 KiB, reconnect, UDP echo, MQTT QoS0 on nats-a :1883 (then removed).
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- JS memory r=1 4p **65k** pubs/s; file r=3 1p **14.3k**; MQTT QoS0 **45k**; UDP p99 **0.36 ms**.
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- Combined report + DL360 Gen10 projection: `reports/optimal-config/REPORT.{md,html,pdf}`.
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- Verdict: keep NATS+JetStream; no MQTT/UDP fabric; metal = 3 NVMe + 10GbE, expect JS r=3 ~40–80k.
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## 2026-09-12 — maximized NS1 NATS study
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- `pct set` 510–513 to 8 cores / 16 GiB; `max_mem: 8G`; tmpfs 8G on JetStream for the ladder only.
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