Measure maximized NATS cluster: 8 cores, 16 GiB, tmpfs JetStream.
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Same NS1 ladder as 20260912T051237Z. Product streams restored to ZFS; raised cores, RAM, and max_mem stay on 510–513.
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63 changed files with 4298 additions and 11 deletions
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@ -51,6 +51,9 @@ bash scripts/bench.sh
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# Full study that must run ON NS1 (orchestrator + charts + HTML/PDF):
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# Full study that must run ON NS1 (orchestrator + charts + HTML/PDF):
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bash scripts/study-on-ns1.sh
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bash scripts/study-on-ns1.sh
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# Maximize cores/RAM + tmpfs JetStream, same ladder, restore ZFS after:
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bash scripts/maximize-ns1-study.sh
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```
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```
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That writes `results/<utc>/` and copies a summary to [BENCH.md](BENCH.md). Full write-up with charts (HTML + PDF) is in the progress repo: [nats-cluster-bench](https://zapier.georgelambert.org/packages/zapier-decisions/reports/nats-cluster-bench.pdf). Core NATS is fire-and-forget; JetStream rows use **file** storage and **replicas=3**. Ping delay is sequential RTT; flood delay is queueing under burst.
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That writes `results/<utc>/` and copies a summary to [BENCH.md](BENCH.md). Full write-up with charts (HTML + PDF) is in the progress repo: [nats-cluster-bench](https://zapier.georgelambert.org/packages/zapier-decisions/reports/nats-cluster-bench.pdf). Core NATS is fire-and-forget; JetStream rows use **file** storage and **replicas=3**. Ping delay is sequential RTT; flood delay is queueing under burst.
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@ -1,8 +1,8 @@
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# Distinct Proxmox LXC guests on NS1 vmbr1. Not the host loopback NATS.
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# Distinct Proxmox LXC guests on NS1 vmbr1. Not the host loopback NATS.
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BRIDGE="${BRIDGE:-vmbr1}"
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BRIDGE="${BRIDGE:-vmbr1}"
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GW="${GW:-10.10.10.1}"
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GW="${GW:-10.10.10.1}"
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MEMORY="${MEMORY:-1024}"
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MEMORY="${MEMORY:-16384}"
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CORES="${CORES:-1}"
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CORES="${CORES:-8}"
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DISK="${DISK:-8}"
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DISK="${DISK:-8}"
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STORAGE="${STORAGE:-SSD2}"
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STORAGE="${STORAGE:-SSD2}"
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TEMPLATE="${TEMPLATE:-/var/lib/vz/template/cache/ubuntu-24.04-standard_24.04-2_amd64.tar.zst}"
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TEMPLATE="${TEMPLATE:-/var/lib/vz/template/cache/ubuntu-24.04-standard_24.04-2_amd64.tar.zst}"
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@ -6,7 +6,7 @@ http: 127.0.0.1:8222
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jetstream {
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jetstream {
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store_dir: /var/lib/nats/jetstream
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store_dir: /var/lib/nats/jetstream
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max_mem: 256M
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max_mem: 8G
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max_file: 4G
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max_file: 4G
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}
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}
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@ -4,3 +4,5 @@
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!20260912T045131Z/**
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!20260912T045131Z/**
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!20260912T051237Z/
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!20260912T051237Z/
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!20260912T051237Z/**
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!20260912T051237Z/**
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!20260912T053120Z/
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!20260912T053120Z/**
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@ -0,0 +1,52 @@
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# NATS cluster message speed
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Run **`20260912T053120Z`** (UTC). Client: LXC **510** `verae-px-worker` (`10.10.10.20`), not a nats-* server. Servers: `nats-a/b/c` on `10.10.10.21–23` (`vmbr1` only).
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Client URL:
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```text
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nats://10.10.10.21:4222,nats://10.10.10.22:4222,nats://10.10.10.23:4222
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```
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## Method
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- **Core NATS** is fire-and-forget pub/sub (`nats bench`). No disk, no replica ack.
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- **JetStream** uses **file** storage and **replicas=3** (same as product streams). The unique stream `benchstream` is deleted between JS loads.
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- Throughput is **msgs/sec** from nats CLI **0.1.6** (`--no-progress --csv`). Its min/avg/max are publisher **rate spread**, not delay.
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- **Ping** delay: one publisher, sequential publish-then-wait. This is one-message round-trip through the cluster.
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- **Flood** delay: N publishers dump the whole batch, then the subscriber drains. This is **queueing under burst**, not wire RTT.
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- Probe: `scripts/latency.mjs` (two connections, header timestamp).
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## Throughput
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| Run | Mode | Aggregate msgs/s | Pub msgs/s | Pub MB/s | Sub msgs/s | Sub MB/s |
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|-----|------|------------------|------------|----------|------------|----------|
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| `core-1p1s-50k-128` | core pub/sub | 810,988 | 599,004 | 73.12 | 456,116 | 55.68 |
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| `core-4p4s-100k-128` | core pub/sub | 1,361,921 | 379,346 | 46.31 | 1,150,536 | 140.45 |
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| `core-4p4s-50k-1k` | core pub/sub | 695,192 | 175,725 | 171.61 | 584,024 | 570.34 |
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| `core-8p8s-200k-128` | core pub/sub | 1,998,733 | 283,259 | 34.58 | 1,780,589 | 217.36 |
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| `js-1p-20k-128-r3` | jetstream r=3 file | — | 17,388 | 2.12 | — | — |
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| `js-2p2s-20k-128-r3` | jetstream r=3 file | 19,876 | 9,959 | 1.22 | 9,942 | 1.21 |
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| `js-4p-20k-1k-r3` | jetstream r=3 file | — | 18,114 | 17.69 | — | — |
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| `js-4p-50k-128-r3` | jetstream r=3 file | — | 22,853 | 2.79 | — | — |
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| `js-mem-1p-20k-128-r3` | jetstream r=3 file | — | 22,153 | 2.70 | — | — |
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| `js-mem-4p-20k-1k-r3` | jetstream r=3 file | — | 28,685 | 28.01 | — | — |
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| `js-mem-4p-50k-128-r3` | jetstream r=3 file | — | 36,355 | 4.44 | — | — |
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## Round-trip delay
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| Run | Kind | Count | Pubs | Size | min | avg | p50 | p90 | p99 | max |
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|-----|------|-------|------|------|-----|-----|-----|-----|-----|-----|
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| `lat-ping-1k-128` | ping (sequential RTT) | 1000 | 1 | 128 B | 0.250ms | 0.319ms | 0.299ms | 0.363ms | 0.684ms | 2.759ms |
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| `lat-1p-5k-128` | flood (burst queueing) | 5000 | 1 | 128 B | 94.920ms | 132.026ms | 131.990ms | 156.086ms | 158.860ms | 158.965ms |
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| `lat-4p-5k-1k` | flood (burst queueing) | 5000 | 4 | 1024 B | 113.281ms | 132.425ms | 131.457ms | 140.317ms | 144.683ms | 145.365ms |
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| `lat-4p-10k-128` | flood (burst queueing) | 10000 | 4 | 128 B | 153.318ms | 204.329ms | 205.865ms | 234.151ms | 237.346ms | 237.477ms |
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| `lat-8p-20k-128` | flood (burst queueing) | 20000 | 8 | 128 B | 233.727ms | 310.924ms | 311.170ms | 373.437ms | 400.764ms | 402.811ms |
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## What the numbers mean
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Product job/event/archive traffic is **JetStream r=3 file**. On this three-LXC stand that is about **16k durable 128 B pubs/s** (about **13k** at 1 KiB). Core NATS is an upper bound for non-durable fan-out: about **0.7–2.0M msgs/s** aggregate at 128 B, or **~630k msgs/s (~616 MB/s)** at 1 KiB with 4 publishers.
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A quiet request-reply is **~0.3 ms** average, **p99 < 1 ms**. Flood rows in the **150–500 ms** band are the subscriber catching up after a burst, which is what a job-events mailbox sees if publishers outrun consumers.
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Re-run on NS1: `bash scripts/bench.sh`. Raw logs/CSVs are under `results/<utc>/`.
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#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
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w2OZLH4YWp0DF7nX2fttF4,S0,50000,6400000,456116,58382861.156470,0.109621
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w2OZLH4YWp0DF7nX2fttF4,P0,50000,6400000,599004,76672615.503222,0.083472
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=== core-1p1s-50k-128 ===
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NATS Pub/Sub stats: 810,988 msgs/sec ~ 99.00 MB/sec
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Pub stats: 599,004 msgs/sec ~ 73.12 MB/sec
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Sub stats: 456,116 msgs/sec ~ 55.68 MB/sec
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Saved metric data in csv file /tmp/bench.csv
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#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
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objwjMbBXlRDUb07UVtRo4,S0,100000,12800000,292772,37474879.058831,0.341562
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objwjMbBXlRDUb07UVtRo4,S1,100000,12800000,290329,37162115.621242,0.344437
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objwjMbBXlRDUb07UVtRo4,S2,100000,12800000,290323,37161444.974130,0.344443
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objwjMbBXlRDUb07UVtRo4,S3,100000,12800000,289603,37069299.877433,0.345299
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objwjMbBXlRDUb07UVtRo4,P0,25000,3200000,554855,71021459.933110,0.045057
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objwjMbBXlRDUb07UVtRo4,P1,25000,3200000,189477,24253105.346766,0.131942
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objwjMbBXlRDUb07UVtRo4,P2,25000,3200000,105092,13451809.359579,0.237886
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objwjMbBXlRDUb07UVtRo4,P3,25000,3200000,95101,12173034.434871,0.262876
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=== core-4p4s-100k-128 ===
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NATS Pub/Sub stats: 1,361,921 msgs/sec ~ 166.25 MB/sec
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Pub stats: 379,346 msgs/sec ~ 46.31 MB/sec
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[1] 554,855 msgs/sec ~ 67.73 MB/sec (25000 msgs)
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[2] 189,477 msgs/sec ~ 23.13 MB/sec (25000 msgs)
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[3] 105,092 msgs/sec ~ 12.83 MB/sec (25000 msgs)
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[4] 95,101 msgs/sec ~ 11.61 MB/sec (25000 msgs)
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min 95,101 | avg 236,131 | max 554,855 | stddev 187,631 msgs
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Sub stats: 1,150,536 msgs/sec ~ 140.45 MB/sec
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[1] 292,772 msgs/sec ~ 35.74 MB/sec (100000 msgs)
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[2] 290,329 msgs/sec ~ 35.44 MB/sec (100000 msgs)
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[3] 290,323 msgs/sec ~ 35.44 MB/sec (100000 msgs)
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[4] 289,603 msgs/sec ~ 35.35 MB/sec (100000 msgs)
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min 289,603 | avg 290,756 | max 292,772 | stddev 1,200 msgs
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Saved metric data in csv file /tmp/bench.csv
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#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
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LPWAPBuugXuZD3pcA9R4Q1,S0,50000,51200000,175324,179532297.676261,0.285185
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LPWAPBuugXuZD3pcA9R4Q1,S1,50000,51200000,174783,178978214.492079,0.286068
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LPWAPBuugXuZD3pcA9R4Q1,S2,50000,51200000,170404,174493875.742093,0.293420
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LPWAPBuugXuZD3pcA9R4Q1,S3,50000,51200000,146006,149510306.440412,0.342451
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LPWAPBuugXuZD3pcA9R4Q1,P0,12500,12800000,206954,211921364.855709,0.060400
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LPWAPBuugXuZD3pcA9R4Q1,P1,12500,12800000,78140,80016334.334450,0.159967
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LPWAPBuugXuZD3pcA9R4Q1,P2,12500,12800000,47044,48173938.085417,0.265704
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LPWAPBuugXuZD3pcA9R4Q1,P3,12500,12800000,43981,45036904.770320,0.284211
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=== core-4p4s-50k-1k ===
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NATS Pub/Sub stats: 695,192 msgs/sec ~ 678.90 MB/sec
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Pub stats: 175,725 msgs/sec ~ 171.61 MB/sec
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[1] 206,954 msgs/sec ~ 202.10 MB/sec (12500 msgs)
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[2] 78,140 msgs/sec ~ 76.31 MB/sec (12500 msgs)
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[3] 47,044 msgs/sec ~ 45.94 MB/sec (12500 msgs)
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[4] 43,981 msgs/sec ~ 42.95 MB/sec (12500 msgs)
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min 43,981 | avg 94,029 | max 206,954 | stddev 66,552 msgs
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Sub stats: 584,024 msgs/sec ~ 570.34 MB/sec
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[1] 175,324 msgs/sec ~ 171.22 MB/sec (50000 msgs)
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[2] 174,783 msgs/sec ~ 170.69 MB/sec (50000 msgs)
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[3] 170,404 msgs/sec ~ 166.41 MB/sec (50000 msgs)
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[4] 146,006 msgs/sec ~ 142.58 MB/sec (50000 msgs)
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min 146,006 | avg 166,629 | max 175,324 | stddev 12,058 msgs
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Saved metric data in csv file /tmp/bench.csv
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#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
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D29xFtCiL3n1hFtnnty2bJ,S0,200000,25600000,275094,35212130.182711,0.727022
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D29xFtCiL3n1hFtnnty2bJ,S1,200000,25600000,274807,35175364.678326,0.727782
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D29xFtCiL3n1hFtnnty2bJ,S2,200000,25600000,274647,35154883.000958,0.728206
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D29xFtCiL3n1hFtnnty2bJ,S3,200000,25600000,274140,35089962.583779,0.729553
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D29xFtCiL3n1hFtnnty2bJ,S4,200000,25600000,273964,35067496.657328,0.730021
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D29xFtCiL3n1hFtnnty2bJ,S5,200000,25600000,228037,29188847.958244,0.877047
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D29xFtCiL3n1hFtnnty2bJ,S6,200000,25600000,227447,29113332.808421,0.879322
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D29xFtCiL3n1hFtnnty2bJ,S7,200000,25600000,232494,29759235.647424,0.860237
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D29xFtCiL3n1hFtnnty2bJ,P0,25000,3200000,127444,16312929.457622,0.196163
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D29xFtCiL3n1hFtnnty2bJ,P1,25000,3200000,77933,9975435.116946,0.320788
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D29xFtCiL3n1hFtnnty2bJ,P2,25000,3200000,77633,9937136.216776,0.322024
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D29xFtCiL3n1hFtnnty2bJ,P3,25000,3200000,76965,9851558.471756,0.324822
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D29xFtCiL3n1hFtnnty2bJ,P4,25000,3200000,77205,9882296.902740,0.323811
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D29xFtCiL3n1hFtnnty2bJ,P5,25000,3200000,44296,5669906.917475,0.564383
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D29xFtCiL3n1hFtnnty2bJ,P6,25000,3200000,35857,4589723.695277,0.697210
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D29xFtCiL3n1hFtnnty2bJ,P7,25000,3200000,35509,4545175.649861,0.704043
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=== core-8p8s-200k-128 ===
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NATS Pub/Sub stats: 1,998,733 msgs/sec ~ 243.99 MB/sec
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Pub stats: 283,259 msgs/sec ~ 34.58 MB/sec
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[1] 127,444 msgs/sec ~ 15.56 MB/sec (25000 msgs)
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[2] 77,933 msgs/sec ~ 9.51 MB/sec (25000 msgs)
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[3] 77,633 msgs/sec ~ 9.48 MB/sec (25000 msgs)
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[4] 76,965 msgs/sec ~ 9.40 MB/sec (25000 msgs)
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[5] 77,205 msgs/sec ~ 9.42 MB/sec (25000 msgs)
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[6] 44,296 msgs/sec ~ 5.41 MB/sec (25000 msgs)
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[7] 35,857 msgs/sec ~ 4.38 MB/sec (25000 msgs)
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[8] 35,509 msgs/sec ~ 4.33 MB/sec (25000 msgs)
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min 35,509 | avg 69,105 | max 127,444 | stddev 28,572 msgs
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Sub stats: 1,780,589 msgs/sec ~ 217.36 MB/sec
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[1] 275,094 msgs/sec ~ 33.58 MB/sec (200000 msgs)
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[2] 274,807 msgs/sec ~ 33.55 MB/sec (200000 msgs)
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[3] 274,647 msgs/sec ~ 33.53 MB/sec (200000 msgs)
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[4] 274,140 msgs/sec ~ 33.46 MB/sec (200000 msgs)
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[5] 273,964 msgs/sec ~ 33.44 MB/sec (200000 msgs)
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[6] 228,037 msgs/sec ~ 27.84 MB/sec (200000 msgs)
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[7] 227,447 msgs/sec ~ 27.76 MB/sec (200000 msgs)
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[8] 232,494 msgs/sec ~ 28.38 MB/sec (200000 msgs)
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min 227,447 | avg 257,578 | max 275,094 | stddev 21,930 msgs
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Saved metric data in csv file /tmp/bench.csv
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execution_host=NS1.GEORGELAMBERT.ORG
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execution_ip=70.88.205.138
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hostname=NS1.GEORGELAMBERT.ORG
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utc=2026-09-12T05:33:03Z
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whoami=marchon
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||||||
|
pwd=/home/marchon/verae-src/verae-nats-cluster
|
||||||
|
uname=Linux NS1.GEORGELAMBERT.ORG 6.17.2-1-pve #1 SMP PREEMPT_DYNAMIC PMX 6.17.2-1 (2025-10-21T11:55Z) x86_64 GNU/Linux
|
||||||
|
nproc=40
|
||||||
|
loadavg=9.02 8.82 8.44 6/3847 224483
|
||||||
|
client_vmid=510
|
||||||
|
nats_url=nats://10.10.10.21:4222,nats://10.10.10.22:4222,nats://10.10.10.23:4222
|
||||||
|
js_extra_memory=1
|
||||||
|
compare_dir=/home/marchon/verae-src/verae-nats-cluster/results/20260912T051237Z
|
||||||
|
--- nats 511 max_mem ---
|
||||||
|
max_mem: 8G
|
||||||
|
--- nats 511 jetstream mount ---
|
||||||
|
nats-js on /var/lib/nats/jetstream type tmpfs (rw,relatime,size=8388608k,uid=100000,gid=100000,inode64)
|
||||||
|
--- free ---
|
||||||
|
total used free shared buff/cache available
|
||||||
|
Mem: 377Gi 38Gi 324Gi 4.3Gi 21Gi 339Gi
|
||||||
|
Swap: 8.0Gi 0B 8.0Gi
|
||||||
|
--- pct list ---
|
||||||
|
VMID Status Lock Name
|
||||||
|
100 stopped CT100
|
||||||
|
101 stopped CT101
|
||||||
|
102 stopped CT102
|
||||||
|
103 stopped CT103
|
||||||
|
104 stopped CT104
|
||||||
|
105 stopped CT105
|
||||||
|
106 stopped CT106
|
||||||
|
107 stopped CT107
|
||||||
|
108 stopped CT108
|
||||||
|
109 stopped CT109
|
||||||
|
110 stopped CT110
|
||||||
|
111 stopped CT111
|
||||||
|
112 stopped CT112
|
||||||
|
113 stopped CT113
|
||||||
|
114 stopped CT114
|
||||||
|
115 stopped CT115
|
||||||
|
116 stopped paul
|
||||||
|
117 stopped CT117
|
||||||
|
118 stopped CT118
|
||||||
|
119 stopped CT119
|
||||||
|
120 stopped rustdeskserver
|
||||||
|
121 stopped CT121
|
||||||
|
122 stopped CT122
|
||||||
|
123 stopped CT123
|
||||||
|
124 stopped bdross
|
||||||
|
200 stopped CT200
|
||||||
|
201 stopped CT201
|
||||||
|
202 stopped CT202
|
||||||
|
300 running mail.veraetime.info
|
||||||
|
400 stopped evercycle-api
|
||||||
|
501 running pki
|
||||||
|
502 running peergos-a
|
||||||
|
503 running peergos-b
|
||||||
|
504 stopped minio
|
||||||
|
510 running verae-px-worker
|
||||||
|
511 running nats-a
|
||||||
|
512 running nats-b
|
||||||
|
513 running nats-c
|
||||||
|
2000 stopped CT2000
|
||||||
|
2001 stopped CT2001
|
||||||
|
2002 stopped CT2002
|
||||||
|
--- pct config 510 ---
|
||||||
|
cores: 8
|
||||||
|
hostname: verae-px-worker
|
||||||
|
memory: 16384
|
||||||
|
net0: name=eth0,bridge=vmbr1,gw=10.10.10.1,hwaddr=BC:24:11:BD:5D:62,ip=10.10.10.20/24,type=veth
|
||||||
|
rootfs: SSD2:subvol-510-disk-0,size=16G
|
||||||
|
swap: 512
|
||||||
|
--- pct config 511 ---
|
||||||
|
cores: 8
|
||||||
|
hostname: nats-a
|
||||||
|
memory: 16384
|
||||||
|
net0: name=eth0,bridge=vmbr1,gw=10.10.10.1,hwaddr=BC:24:11:CF:AC:68,ip=10.10.10.21/24,type=veth
|
||||||
|
rootfs: SSD2:subvol-511-disk-0,size=8G
|
||||||
|
swap: 256
|
||||||
|
--- pct config 512 ---
|
||||||
|
cores: 8
|
||||||
|
hostname: nats-b
|
||||||
|
memory: 16384
|
||||||
|
net0: name=eth0,bridge=vmbr1,gw=10.10.10.1,hwaddr=BC:24:11:42:73:A2,ip=10.10.10.22/24,type=veth
|
||||||
|
rootfs: SSD2:subvol-512-disk-0,size=8G
|
||||||
|
swap: 256
|
||||||
|
--- pct config 513 ---
|
||||||
|
cores: 8
|
||||||
|
hostname: nats-c
|
||||||
|
memory: 16384
|
||||||
|
net0: name=eth0,bridge=vmbr1,gw=10.10.10.1,hwaddr=BC:24:11:1B:9B:DC,ip=10.10.10.23/24,type=veth
|
||||||
|
rootfs: SSD2:subvol-513-disk-0,size=8G
|
||||||
|
swap: 256
|
||||||
|
|
@ -0,0 +1,92 @@
|
||||||
|
execution_host=NS1.GEORGELAMBERT.ORG
|
||||||
|
execution_ip=70.88.205.138
|
||||||
|
hostname=NS1.GEORGELAMBERT.ORG
|
||||||
|
utc=2026-09-12T05:31:20Z
|
||||||
|
whoami=marchon
|
||||||
|
pwd=/home/marchon/verae-src/verae-nats-cluster
|
||||||
|
uname=Linux NS1.GEORGELAMBERT.ORG 6.17.2-1-pve #1 SMP PREEMPT_DYNAMIC PMX 6.17.2-1 (2025-10-21T11:55Z) x86_64 GNU/Linux
|
||||||
|
nproc=40
|
||||||
|
loadavg=8.77 8.39 8.26 6/3849 198471
|
||||||
|
client_vmid=510
|
||||||
|
nats_url=nats://10.10.10.21:4222,nats://10.10.10.22:4222,nats://10.10.10.23:4222
|
||||||
|
js_extra_memory=1
|
||||||
|
compare_dir=/home/marchon/verae-src/verae-nats-cluster/results/20260912T051237Z
|
||||||
|
--- nats 511 max_mem ---
|
||||||
|
max_mem: 8G
|
||||||
|
--- nats 511 jetstream mount ---
|
||||||
|
nats-js on /var/lib/nats/jetstream type tmpfs (rw,relatime,size=8388608k,uid=100000,gid=100000,inode64)
|
||||||
|
--- free ---
|
||||||
|
total used free shared buff/cache available
|
||||||
|
Mem: 377Gi 38Gi 324Gi 4.2Gi 21Gi 339Gi
|
||||||
|
Swap: 8.0Gi 0B 8.0Gi
|
||||||
|
--- pct list ---
|
||||||
|
VMID Status Lock Name
|
||||||
|
100 stopped CT100
|
||||||
|
101 stopped CT101
|
||||||
|
102 stopped CT102
|
||||||
|
103 stopped CT103
|
||||||
|
104 stopped CT104
|
||||||
|
105 stopped CT105
|
||||||
|
106 stopped CT106
|
||||||
|
107 stopped CT107
|
||||||
|
108 stopped CT108
|
||||||
|
109 stopped CT109
|
||||||
|
110 stopped CT110
|
||||||
|
111 stopped CT111
|
||||||
|
112 stopped CT112
|
||||||
|
113 stopped CT113
|
||||||
|
114 stopped CT114
|
||||||
|
115 stopped CT115
|
||||||
|
116 stopped paul
|
||||||
|
117 stopped CT117
|
||||||
|
118 stopped CT118
|
||||||
|
119 stopped CT119
|
||||||
|
120 stopped rustdeskserver
|
||||||
|
121 stopped CT121
|
||||||
|
122 stopped CT122
|
||||||
|
123 stopped CT123
|
||||||
|
124 stopped bdross
|
||||||
|
200 stopped CT200
|
||||||
|
201 stopped CT201
|
||||||
|
202 stopped CT202
|
||||||
|
300 running mail.veraetime.info
|
||||||
|
400 stopped evercycle-api
|
||||||
|
501 running pki
|
||||||
|
502 running peergos-a
|
||||||
|
503 running peergos-b
|
||||||
|
504 stopped minio
|
||||||
|
510 running verae-px-worker
|
||||||
|
511 running nats-a
|
||||||
|
512 running nats-b
|
||||||
|
513 running nats-c
|
||||||
|
2000 stopped CT2000
|
||||||
|
2001 stopped CT2001
|
||||||
|
2002 stopped CT2002
|
||||||
|
--- pct config 510 ---
|
||||||
|
cores: 8
|
||||||
|
hostname: verae-px-worker
|
||||||
|
memory: 16384
|
||||||
|
net0: name=eth0,bridge=vmbr1,gw=10.10.10.1,hwaddr=BC:24:11:BD:5D:62,ip=10.10.10.20/24,type=veth
|
||||||
|
rootfs: SSD2:subvol-510-disk-0,size=16G
|
||||||
|
swap: 512
|
||||||
|
--- pct config 511 ---
|
||||||
|
cores: 8
|
||||||
|
hostname: nats-a
|
||||||
|
memory: 16384
|
||||||
|
net0: name=eth0,bridge=vmbr1,gw=10.10.10.1,hwaddr=BC:24:11:CF:AC:68,ip=10.10.10.21/24,type=veth
|
||||||
|
rootfs: SSD2:subvol-511-disk-0,size=8G
|
||||||
|
swap: 256
|
||||||
|
--- pct config 512 ---
|
||||||
|
cores: 8
|
||||||
|
hostname: nats-b
|
||||||
|
memory: 16384
|
||||||
|
net0: name=eth0,bridge=vmbr1,gw=10.10.10.1,hwaddr=BC:24:11:42:73:A2,ip=10.10.10.22/24,type=veth
|
||||||
|
rootfs: SSD2:subvol-512-disk-0,size=8G
|
||||||
|
swap: 256
|
||||||
|
--- pct config 513 ---
|
||||||
|
cores: 8
|
||||||
|
hostname: nats-c
|
||||||
|
memory: 16384
|
||||||
|
net0: name=eth0,bridge=vmbr1,gw=10.10.10.1,hwaddr=BC:24:11:1B:9B:DC,ip=10.10.10.23/24,type=veth
|
||||||
|
rootfs: SSD2:subvol-513-disk-0,size=8G
|
||||||
|
swap: 256
|
||||||
|
|
@ -0,0 +1,2 @@
|
||||||
|
#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
|
||||||
|
DsDjrcOoYbw8k54T1mMXxq,P0,40000,2560000,17388,2225703.026620,1.150198
|
||||||
|
|
|
@ -0,0 +1,5 @@
|
||||||
|
=== js-1p-20k-128-r3 ===
|
||||||
|
|
||||||
|
Pub stats: 17,388 msgs/sec ~ 2.12 MB/sec
|
||||||
|
|
||||||
|
Saved metric data in csv file /tmp/bench.csv
|
||||||
|
|
@ -0,0 +1,5 @@
|
||||||
|
#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
|
||||||
|
JYqsv0sXzEqkC0r49q0aE5,S0,20203,1280000,5135,657394.514895,1.947080
|
||||||
|
JYqsv0sXzEqkC0r49q0aE5,S1,20210,1280000,4971,636317.997133,2.011573
|
||||||
|
JYqsv0sXzEqkC0r49q0aE5,P0,20000,1280000,5099,652788.600986,1.960819
|
||||||
|
JYqsv0sXzEqkC0r49q0aE5,P1,20000,1280000,4979,637405.779512,2.008140
|
||||||
|
|
|
@ -0,0 +1,13 @@
|
||||||
|
=== js-2p2s-20k-128-r3 ===
|
||||||
|
|
||||||
|
NATS Pub/Sub stats: 19,876 msgs/sec ~ 2.43 MB/sec
|
||||||
|
Pub stats: 9,959 msgs/sec ~ 1.22 MB/sec
|
||||||
|
[1] 5,099 msgs/sec ~ 637.49 KB/sec (10000 msgs)
|
||||||
|
[2] 4,979 msgs/sec ~ 622.47 KB/sec (10000 msgs)
|
||||||
|
min 4,979 | avg 5,039 | max 5,099 | stddev 60 msgs
|
||||||
|
Sub stats: 9,942 msgs/sec ~ 1.21 MB/sec
|
||||||
|
[1] 5,135 msgs/sec ~ 641.99 KB/sec (10000 msgs)
|
||||||
|
[2] 4,971 msgs/sec ~ 621.40 KB/sec (10000 msgs)
|
||||||
|
min 4,971 | avg 5,053 | max 5,135 | stddev 82 msgs
|
||||||
|
|
||||||
|
Saved metric data in csv file /tmp/bench.csv
|
||||||
|
|
@ -0,0 +1,5 @@
|
||||||
|
#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
|
||||||
|
r1r7AI1sRr29EvqNG14gSh,P0,10000,5120000,7677,7861269.752874,0.651294
|
||||||
|
r1r7AI1sRr29EvqNG14gSh,P1,10000,5120000,4571,4680909.596986,1.093805
|
||||||
|
r1r7AI1sRr29EvqNG14gSh,P2,10000,5120000,4529,4637905.946623,1.103946
|
||||||
|
r1r7AI1sRr29EvqNG14gSh,P3,10000,5120000,4528,4637319.175494,1.104086
|
||||||
|
|
|
@ -0,0 +1,10 @@
|
||||||
|
=== js-4p-20k-1k-r3 ===
|
||||||
|
|
||||||
|
Pub stats: 18,114 msgs/sec ~ 17.69 MB/sec
|
||||||
|
[1] 7,677 msgs/sec ~ 7.50 MB/sec (5000 msgs)
|
||||||
|
[2] 4,571 msgs/sec ~ 4.46 MB/sec (5000 msgs)
|
||||||
|
[3] 4,529 msgs/sec ~ 4.42 MB/sec (5000 msgs)
|
||||||
|
[4] 4,528 msgs/sec ~ 4.42 MB/sec (5000 msgs)
|
||||||
|
min 4,528 | avg 5,326 | max 7,677 | stddev 1,357 msgs
|
||||||
|
|
||||||
|
Saved metric data in csv file /tmp/bench.csv
|
||||||
|
|
@ -0,0 +1,5 @@
|
||||||
|
#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
|
||||||
|
6cJTgCeHUXHowXNlC39Tws,P0,25000,1600000,7724,988748.856206,1.618207
|
||||||
|
6cJTgCeHUXHowXNlC39Tws,P1,25000,1600000,7704,986199.433317,1.622390
|
||||||
|
6cJTgCeHUXHowXNlC39Tws,P2,25000,1600000,5713,731384.231657,2.187633
|
||||||
|
6cJTgCeHUXHowXNlC39Tws,P3,25000,1600000,5713,731308.958368,2.187858
|
||||||
|
|
|
@ -0,0 +1,10 @@
|
||||||
|
=== js-4p-50k-128-r3 ===
|
||||||
|
|
||||||
|
Pub stats: 22,853 msgs/sec ~ 2.79 MB/sec
|
||||||
|
[1] 7,724 msgs/sec ~ 965.58 KB/sec (12500 msgs)
|
||||||
|
[2] 7,704 msgs/sec ~ 963.09 KB/sec (12500 msgs)
|
||||||
|
[3] 5,713 msgs/sec ~ 714.24 KB/sec (12500 msgs)
|
||||||
|
[4] 5,713 msgs/sec ~ 714.17 KB/sec (12500 msgs)
|
||||||
|
min 5,713 | avg 6,713 | max 7,724 | stddev 1,000 msgs
|
||||||
|
|
||||||
|
Saved metric data in csv file /tmp/bench.csv
|
||||||
|
|
@ -0,0 +1,2 @@
|
||||||
|
#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
|
||||||
|
jHJGzEaQyqmtfzAfyQRddn,P0,40000,2560000,22153,2835624.882291,0.902799
|
||||||
|
|
|
@ -0,0 +1,5 @@
|
||||||
|
=== js-mem-1p-20k-128-r3 ===
|
||||||
|
|
||||||
|
Pub stats: 22,153 msgs/sec ~ 2.70 MB/sec
|
||||||
|
|
||||||
|
Saved metric data in csv file /tmp/bench.csv
|
||||||
|
|
@ -0,0 +1,5 @@
|
||||||
|
#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
|
||||||
|
bSUG5M5Cdh9fEhPsY8MWLm,P0,10000,5120000,9256,9478798.103952,0.540153
|
||||||
|
bSUG5M5Cdh9fEhPsY8MWLm,P1,10000,5120000,8901,9115347.820727,0.561690
|
||||||
|
bSUG5M5Cdh9fEhPsY8MWLm,P2,10000,5120000,7192,7365226.588506,0.695159
|
||||||
|
bSUG5M5Cdh9fEhPsY8MWLm,P3,10000,5120000,7171,7343566.738925,0.697209
|
||||||
|
|
|
@ -0,0 +1,10 @@
|
||||||
|
=== js-mem-4p-20k-1k-r3 ===
|
||||||
|
|
||||||
|
Pub stats: 28,685 msgs/sec ~ 28.01 MB/sec
|
||||||
|
[1] 9,256 msgs/sec ~ 9.04 MB/sec (5000 msgs)
|
||||||
|
[2] 8,901 msgs/sec ~ 8.69 MB/sec (5000 msgs)
|
||||||
|
[3] 7,192 msgs/sec ~ 7.02 MB/sec (5000 msgs)
|
||||||
|
[4] 7,171 msgs/sec ~ 7.00 MB/sec (5000 msgs)
|
||||||
|
min 7,171 | avg 8,130 | max 9,256 | stddev 956 msgs
|
||||||
|
|
||||||
|
Saved metric data in csv file /tmp/bench.csv
|
||||||
|
|
@ -0,0 +1,5 @@
|
||||||
|
#RunID,ClientID,MsgCount,MsgBytes,MsgsPerSec,BytesPerSec,DurationSecs
|
||||||
|
RCjYO8CWEOKsynfDUe3izo,P0,25000,1600000,9194,1176894.303068,1.359510
|
||||||
|
RCjYO8CWEOKsynfDUe3izo,P1,25000,1600000,9199,1177484.153608,1.358829
|
||||||
|
RCjYO8CWEOKsynfDUe3izo,P2,25000,1600000,9144,1170517.752374,1.366916
|
||||||
|
RCjYO8CWEOKsynfDUe3izo,P3,25000,1600000,9097,1164445.806755,1.374044
|
||||||
|
|
|
@ -0,0 +1,10 @@
|
||||||
|
=== js-mem-4p-50k-128-r3 ===
|
||||||
|
|
||||||
|
Pub stats: 36,355 msgs/sec ~ 4.44 MB/sec
|
||||||
|
[1] 9,194 msgs/sec ~ 1.12 MB/sec (12500 msgs)
|
||||||
|
[2] 9,199 msgs/sec ~ 1.12 MB/sec (12500 msgs)
|
||||||
|
[3] 9,144 msgs/sec ~ 1.12 MB/sec (12500 msgs)
|
||||||
|
[4] 9,097 msgs/sec ~ 1.11 MB/sec (12500 msgs)
|
||||||
|
min 9,097 | avg 9,158 | max 9,199 | stddev 41 msgs
|
||||||
|
|
||||||
|
Saved metric data in csv file /tmp/bench.csv
|
||||||
|
|
@ -0,0 +1,2 @@
|
||||||
|
=== lat-1p-5k-128 ===
|
||||||
|
{"count":5000,"pubs":1,"size":128,"mode":"flood","min_us":94920,"avg_us":132026,"p50_us":131990,"p90_us":156086,"p99_us":158860,"max_us":158965,"min":"94.920ms","avg":"132.026ms","p50":"131.990ms","p90":"156.086ms","p99":"158.860ms","max":"158.965ms"}
|
||||||
|
|
@ -0,0 +1,2 @@
|
||||||
|
=== lat-4p-10k-128 ===
|
||||||
|
{"count":10000,"pubs":4,"size":128,"mode":"flood","min_us":153318,"avg_us":204329,"p50_us":205865,"p90_us":234151,"p99_us":237346,"max_us":237477,"min":"153.318ms","avg":"204.329ms","p50":"205.865ms","p90":"234.151ms","p99":"237.346ms","max":"237.477ms"}
|
||||||
|
|
@ -0,0 +1,2 @@
|
||||||
|
=== lat-4p-5k-1k ===
|
||||||
|
{"count":5000,"pubs":4,"size":1024,"mode":"flood","min_us":113281,"avg_us":132425,"p50_us":131457,"p90_us":140317,"p99_us":144683,"max_us":145365,"min":"113.281ms","avg":"132.425ms","p50":"131.457ms","p90":"140.317ms","p99":"144.683ms","max":"145.365ms"}
|
||||||
|
|
@ -0,0 +1,2 @@
|
||||||
|
=== lat-8p-20k-128 ===
|
||||||
|
{"count":20000,"pubs":8,"size":128,"mode":"flood","min_us":233727,"avg_us":310924,"p50_us":311170,"p90_us":373437,"p99_us":400764,"max_us":402811,"min":"233.727ms","avg":"310.924ms","p50":"311.170ms","p90":"373.437ms","p99":"400.764ms","max":"402.811ms"}
|
||||||
|
|
@ -0,0 +1,2 @@
|
||||||
|
=== lat-ping-1k-128 ===
|
||||||
|
{"count":1000,"pubs":1,"size":128,"mode":"ping","min_us":250,"avg_us":319,"p50_us":299,"p90_us":363,"p99_us":684,"max_us":2759,"min":"0.250ms","avg":"0.319ms","p50":"0.299ms","p90":"0.363ms","p99":"0.684ms","max":"2.759ms"}
|
||||||
File diff suppressed because it is too large
Load diff
|
|
@ -0,0 +1,355 @@
|
||||||
|
**Progress report (maximized NS1 study)** · run `20260912T053120Z` (UTC)
|
||||||
|
|
||||||
|
> **Execution provenance.** Every process for this study ran on **NS1.GEORGELAMBERT.ORG** (`70.88.205.138`): `maximize-ns1-study.sh` (cores/RAM/`max_mem`/tmpfs), then `study-on-ns1.sh`, `nats bench`, `latency.mjs` (LXC 510), matplotlib, pandoc, weasyprint. Traffic stayed on `vmbr1`. veth/10G was **not** changed. After the ladder, JetStream was put back on ZFS and product streams were re-created; **8 cores / 16 GiB / max_mem 8G stay**.
|
||||||
|
|
||||||
|
## Measured delta vs `20260912T051237Z`
|
||||||
|
|
||||||
|
Baseline: 1 core / 1 GiB / JetStream on ZFS. This run: 8 cores / 16 GiB / JetStream **tmpfs** (file r=3) plus extra **memory** store rows. veth/10G unchanged.
|
||||||
|
|
||||||
|
| Metric | Baseline `20260912T051237Z` | This run | Ratio |
|
||||||
|
|--------|-------------------------|----------|-------|
|
||||||
|
| Core 1p1s 128 B pub msgs/s | 502,502 | 599,004 | 1.19× |
|
||||||
|
| Core 8p8s 128 B aggregate msgs/s | 2,065,217 | 1,998,733 | 0.97× |
|
||||||
|
| JS file r=3 1p 128 B pub msgs/s | 7,393 | 17,388 | 2.35× |
|
||||||
|
| JS file r=3 4p 128 B pub msgs/s | 17,986 | 22,853 | 1.27× |
|
||||||
|
| JS file r=3 4p 1 KiB pub msgs/s | 14,985 | 18,114 | 1.21× |
|
||||||
|
| JS memory r=3 1p 128 B pub msgs/s | — | 22,153 | — |
|
||||||
|
| JS memory r=3 4p 128 B pub msgs/s | — | 36,355 | — |
|
||||||
|
| Ping p99 (ms) | 1.377ms | 0.684ms | 2.01× faster |
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*Baseline vs maximized publish rates (log)*
|
||||||
|
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 1. Executive summary
|
||||||
|
|
||||||
|
| Item | This NS1-host run |
|
||||||
|
|------|-------------------|
|
||||||
|
| Control plane | NS1.GEORGELAMBERT.ORG (`70.88.205.138`), user `marchon` |
|
||||||
|
| Bench client | LXC 510 `verae-px-worker` |
|
||||||
|
| Brokers | LXC 511/512/513 `nats-a/b/c` on `10.10.10.21–23` |
|
||||||
|
| Client URL | `nats://10.10.10.21:4222,nats://10.10.10.22:4222,nats://10.10.10.23:4222` |
|
||||||
|
| Host load before | `8.77 8.39 8.26 6/3849 198471` |
|
||||||
|
| Host load after | `9.02 8.82 8.44 6/3847 224483` |
|
||||||
|
| Core 1p1s 128 B pub | 599,004 msgs/s |
|
||||||
|
| JetStream 1p 128 B r=3 | 17,388 durable pubs/s |
|
||||||
|
| Ping p50 / p99 | 0.299ms / 0.684ms |
|
||||||
|
|
||||||
|
Product traffic is the JetStream row. Ping is one-message delay. Flood is mailbox catch-up after a burst.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 2. Where it ran (and where it did not)
|
||||||
|
|
||||||
|
```text
|
||||||
|
Operator laptop ──ssh──► NS1.GEORGELAMBERT.ORG 70.88.205.138
|
||||||
|
study-on-ns1.sh
|
||||||
|
python3 build-ns1-study-report.py
|
||||||
|
sudo pct exec 510 ──► nats bench / latency.mjs
|
||||||
|
│
|
||||||
|
▼ vmbr1
|
||||||
|
10.10.10.21-23 :4222
|
||||||
|
```
|
||||||
|
|
||||||
|
- **Did run on 138:** bash, python3, matplotlib, pandoc, weasyprint, `pct`, nats-server (in LXC), nats CLI and Node (in LXC 510).
|
||||||
|
- **Did not run on the laptop:** no local `nats bench`, no local charting, no local WeasyPrint for this file.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 3. Results (this run)
|
||||||
|
|
||||||
|
### Host and brokers
|
||||||
|
|
||||||
|
**Before**
|
||||||
|
|
||||||
|
| Node | VMID | connections | in_msgs | out_msgs | cpu | cores | mem (B) | jetstream |
|
||||||
|
|------|------|-------------|---------|----------|-----|-------|---------|-----------|
|
||||||
|
| nats-a | 511 | 3 | 3,013 | 3,037 | 1 | 8 | 14,553,088 | True |
|
||||||
|
| nats-b | 512 | 3 | 1,415 | 1,424 | 0 | 1 | 13,557,760 | True |
|
||||||
|
| nats-c | 513 | 0 | 1,361 | 1,395 | 1 | 1 | 14,028,800 | True |
|
||||||
|
|
||||||
|
**After**
|
||||||
|
|
||||||
|
| Node | VMID | connections | in_msgs | out_msgs | cpu | cores | mem (B) | jetstream |
|
||||||
|
|------|------|-------------|---------|----------|-----|-------|---------|-----------|
|
||||||
|
| nats-a | 511 | 3 | 644,730 | 1,344,768 | 2 | 8 | 67,104,768 | True |
|
||||||
|
| nats-b | 512 | 3 | 491,295 | 978,800 | 1 | 1 | 82,542,592 | True |
|
||||||
|
| nats-c | 513 | 0 | 668,544 | 1,330,940 | 0 | 1 | 37,314,560 | True |
|
||||||
|
|
||||||
|
nproc=40 · uname=`Linux NS1.GEORGELAMBERT.ORG 6.17.2-1-pve #1 SMP PREEMPT_DYNAMIC PMX 6.17.2-1 (2025-10-21T11:55Z) x86_64 GNU/Linux`
|
||||||
|
|
||||||
|
### Throughput
|
||||||
|
|
||||||
|
| Run | Mode | Aggregate msgs/s | Pub msgs/s | Pub MB/s | Sub msgs/s | Sub MB/s |
|
||||||
|
|-----|------|------------------|------------|----------|------------|----------|
|
||||||
|
| `core-1p1s-50k-128` | core pub/sub | 810,988 | 599,004 | 73.12 | 456,116 | 55.68 |
|
||||||
|
| `core-4p4s-100k-128` | core pub/sub | 1,361,921 | 379,346 | 46.31 | 1,150,536 | 140.45 |
|
||||||
|
| `core-4p4s-50k-1k` | core pub/sub | 695,192 | 175,725 | 171.61 | 584,024 | 570.34 |
|
||||||
|
| `core-8p8s-200k-128` | core pub/sub | 1,998,733 | 283,259 | 34.58 | 1,780,589 | 217.36 |
|
||||||
|
| `js-1p-20k-128-r3` | jetstream r=3 file | — | 17,388 | 2.12 | — | — |
|
||||||
|
| `js-2p2s-20k-128-r3` | jetstream r=3 file | 19,876 | 9,959 | 1.22 | 9,942 | 1.21 |
|
||||||
|
| `js-4p-20k-1k-r3` | jetstream r=3 file | — | 18,114 | 17.69 | — | — |
|
||||||
|
| `js-4p-50k-128-r3` | jetstream r=3 file | — | 22,853 | 2.79 | — | — |
|
||||||
|
| `js-mem-1p-20k-128-r3` | jetstream r=3 file | — | 22,153 | 2.70 | — | — |
|
||||||
|
| `js-mem-4p-20k-1k-r3` | jetstream r=3 file | — | 28,685 | 28.01 | — | — |
|
||||||
|
| `js-mem-4p-50k-128-r3` | jetstream r=3 file | — | 36,355 | 4.44 | — | — |
|
||||||
|
|
||||||
|
### Round-trip delay
|
||||||
|
|
||||||
|
| Run | Kind | Count | Pubs | Size | min | avg | p50 | p90 | p99 | max |
|
||||||
|
|-----|------|-------|------|------|-----|-----|-----|-----|-----|-----|
|
||||||
|
| `lat-ping-1k-128` | ping (sequential RTT) | 1000 | 1 | 128 B | 0.250ms | 0.319ms | 0.299ms | 0.363ms | 0.684ms | 2.759ms |
|
||||||
|
| `lat-1p-5k-128` | flood (burst queueing) | 5000 | 1 | 128 B | 94.920ms | 132.026ms | 131.990ms | 156.086ms | 158.860ms | 158.965ms |
|
||||||
|
| `lat-4p-5k-1k` | flood (burst queueing) | 5000 | 4 | 1024 B | 113.281ms | 132.425ms | 131.457ms | 140.317ms | 144.683ms | 145.365ms |
|
||||||
|
| `lat-4p-10k-128` | flood (burst queueing) | 10000 | 4 | 128 B | 153.318ms | 204.329ms | 205.865ms | 234.151ms | 237.346ms | 237.477ms |
|
||||||
|
| `lat-8p-20k-128` | flood (burst queueing) | 20000 | 8 | 128 B | 233.727ms | 310.924ms | 311.170ms | 373.437ms | 400.764ms | 402.811ms |
|
||||||
|
|
||||||
|
### Core NATS
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*Core NATS throughput at four loads (NS1 host run)*
|
||||||
|
### Payload size (core)
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*Core NATS 128 B vs 1 KiB (NS1 host run)*
|
||||||
|
### JetStream r=3 file
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*JetStream durable publish rate (NS1 host run)*
|
||||||
|
### Core vs JetStream
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*Core vs JetStream publish rate, log scale (NS1 host run)*
|
||||||
|
### Delay
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*Ping vs flood delay percentiles, log scale (NS1 host run)*
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 4. Study methodology
|
||||||
|
|
||||||
|
### 4.1 Question
|
||||||
|
|
||||||
|
On the NS1 test stand, what message **throughput** and **delay** does the three-node `verae` JetStream cluster deliver at several loads, and which part of the stack is the limiter for product traffic (jobs, events, webhooks, archive)?
|
||||||
|
|
||||||
|
### 4.2 Hypotheses (stated before the run)
|
||||||
|
|
||||||
|
1. **H1 — Core vs JetStream.** Fire-and-forget core NATS is at least an order of magnitude faster than JetStream **file + replicas=3**, because durable publish waits for a majority disk replica.
|
||||||
|
2. **H2 — JetStream parallelism.** Adding publishers does **not** linearly increase JetStream write rate once the replica log is saturated.
|
||||||
|
3. **H3 — Quiet delay.** Sequential pub→sub round trip on `vmbr1` is well under 1 ms p99 when the consumer is waiting.
|
||||||
|
4. **H4 — Burst delay.** If publishers dump a batch before the subscriber drains, observed delay is **queueing time**, roughly linear in backlog, not in cluster hop count.
|
||||||
|
5. **H5 — Payload.** Moving 128 B → 1 KiB lowers message rate and raises byte rate on core NATS; JetStream in this size band stays replica/fsync bound.
|
||||||
|
|
||||||
|
### 4.3 Independent variables (what we changed)
|
||||||
|
|
||||||
|
| Factor | Levels |
|
||||||
|
|--------|--------|
|
||||||
|
| Transport | Core NATS pub/sub vs JetStream file replicas=3 |
|
||||||
|
| Publisher count | 1, 2, 4, 8 |
|
||||||
|
| Subscriber count | 0 (JS publish-only), 1, 2, 4, 8 |
|
||||||
|
| Message count | 1k, 5k, 10k, 20k, 50k, 100k, 200k (by ladder step) |
|
||||||
|
| Payload | 128 B, 1024 B |
|
||||||
|
| Delay mode | **ping** (publish, wait, repeat) vs **flood** (publish all, then drain) |
|
||||||
|
|
||||||
|
### 4.4 Dependent variables (what we recorded)
|
||||||
|
|
||||||
|
| Metric | Instrument | Unit |
|
||||||
|
|--------|------------|------|
|
||||||
|
| Publish rate | `nats bench` 0.1.6 Pub stats | msgs/s, MB/s |
|
||||||
|
| Subscribe rate | `nats bench` Sub stats | msgs/s, MB/s |
|
||||||
|
| Aggregate | `nats bench` NATS Pub/Sub stats | msgs/s (fan-out counts both sides) |
|
||||||
|
| Publisher spread | nats min/avg/max **msgs/s** | not delay |
|
||||||
|
| One-way-ish RTT | `latency.mjs` header timestamp | min, avg, p50, p90, p99, max |
|
||||||
|
| Host load | `/proc/loadavg` before and after | load average |
|
||||||
|
| Broker counters | `http://127.0.0.1:8222/varz` inside each nats LXC | connections, in/out msgs, cpu, mem |
|
||||||
|
|
||||||
|
**Important:** nats CLI 0.1.6 min/avg/max are **rate spread across publishers**, not microseconds of delay. Delay is only `latency.mjs`.
|
||||||
|
|
||||||
|
### 4.5 Controls and constants
|
||||||
|
|
||||||
|
- Cluster name `verae`, three routes, client `:4222`, cluster `:6222`, monitor loopback `:8222`.
|
||||||
|
- Client URL always the three-node list on `vmbr1` (never host `127.0.0.1:4222`, never `vmbr0`).
|
||||||
|
- Bench client is LXC **510**, not a nats-* server.
|
||||||
|
- JetStream bench stream name `benchstream`, **file** storage, **replicas=3**, deleted between JS loads (`nats stream rm --force`) so names do not collide.
|
||||||
|
- Product streams were **not** the bench target (no load test on `ZAPIER_*` / `VERAE_ARCHIVE`).
|
||||||
|
- No TLS, no nkeys, no account isolation (isolation is `vmbr1`).
|
||||||
|
- Same nats CLI version (0.1.6) and `nats@2` Node client as the first ladder.
|
||||||
|
|
||||||
|
### 4.6 Procedure
|
||||||
|
|
||||||
|
1. Confirm this script is executing on **NS1.GEORGELAMBERT.ORG**. Refuse otherwise.
|
||||||
|
2. Snapshot host load, memory, LXC configs, and each nats `varz`.
|
||||||
|
3. From NS1, `pct exec 510` the core ladder (1p1s, 4p4s, 8p8s at 128 B; 4p4s at 1 KiB).
|
||||||
|
4. Delete `benchstream`; JS ladder (1p, 4p, 4p×1 KiB, 2p2s pull) at replicas=3 file.
|
||||||
|
5. Copy `latency.mjs` into 510; ping then flood at several batch sizes.
|
||||||
|
6. Snapshot host/`varz` again.
|
||||||
|
7. Parse logs on **this host**; draw charts; write HTML and PDF on **this host**.
|
||||||
|
|
||||||
|
No publish, subscribe, chart, or PDF process runs on the operator laptop for this study.
|
||||||
|
|
||||||
|
### 4.7 Instrumentation path
|
||||||
|
|
||||||
|
```text
|
||||||
|
[NS1 host 70.88.205.138]
|
||||||
|
study-on-ns1.sh (bash + python3)
|
||||||
|
|
|
||||||
|
| sudo pct exec 510
|
||||||
|
v
|
||||||
|
[LXC 510 verae-px-worker 10.10.10.20]
|
||||||
|
nats bench / node latency.mjs
|
||||||
|
|
|
||||||
|
| NATS client protocol to
|
||||||
|
v
|
||||||
|
[LXC 511/512/513 10.10.10.21-23 :4222]
|
||||||
|
nats-server -js cluster routes :6222
|
||||||
|
```
|
||||||
|
|
||||||
|
The hypervisor issues the guest commands. The messages themselves never leave `vmbr1`.
|
||||||
|
|
||||||
|
### 4.8 Threats to validity
|
||||||
|
|
||||||
|
| Threat | Effect on numbers |
|
||||||
|
|--------|-------------------|
|
||||||
|
| **One physical host** | Three “replicas” share CPU, memory, and usually the same datastore. This measures process/LXC HA, not disk HA. |
|
||||||
|
| **Shared load** | NS1 also runs Caddy, Forgejo, keep, fleet, portal, and other CTs. Load average during a run is part of the result, not noise to ignore. |
|
||||||
|
| **Single bench client** | All publishers live in 510. Per-publisher rate spread is contention in that guest. |
|
||||||
|
| **Short runs** | Seconds of traffic. No compaction, no multi-hour page-cache eviction, no snapshot during load. |
|
||||||
|
| **No TLS/nkeys** | Production auth will cost CPU. Do not treat these rates as post-nkeys rates. |
|
||||||
|
| **Fan-out aggregate** | Core aggregate msgs/s counts pub+sub. Do not compare that column to JetStream unique writes. |
|
||||||
|
| **Flood ≠ RTT** | Mixing flood averages with ping p99 produces a fake “NATS is slow” story. |
|
||||||
|
| **Lab only** | Not a Zapier HTTPS bench and not live `api.veraetime.net`. |
|
||||||
|
|
||||||
|
### 4.9 Ethics / safety
|
||||||
|
|
||||||
|
Bench uses throwaway subjects (`bench.core.*`, `bench.js.*`, `bench.lat.*`) and a throwaway stream. It does not purge product streams. Zapier cloud has no NATS socket.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 5. Suggestions for fine-tuning
|
||||||
|
|
||||||
|
These follow from the method and from the first ladder on this stand (JetStream ~16k durable 128 B pubs/s; ping ~0.3 ms; flood hundreds of ms). Apply in order of leverage. Re-run **this NS1 study** after each change so the delta is measured the same way.
|
||||||
|
|
||||||
|
### 5.1 Treat JetStream as the product limiter
|
||||||
|
|
||||||
|
Product jobs/events/webhooks/archive are durable. Tuning core NATS to 2M msgs/s will not move a timestamp Zap. Put effort into **replica write path** and **consumer lag**, not core fan-out.
|
||||||
|
|
||||||
|
### 5.2 Split storage class by stream
|
||||||
|
|
||||||
|
| Stream | Suggested store | Why |
|
||||||
|
|--------|-----------------|-----|
|
||||||
|
| `ZAPIER_JOBS` | file, r=3 | Work queue; lose-a-job is bad |
|
||||||
|
| `ZAPIER_EVENTS` | file r=3, or memory r=3 if events are rebuildable from job status | Hot waiters; measure both |
|
||||||
|
| `ZAPIER_WEBHOOKS` | file, r=3, workqueue | HTTPS to Zapier is the slow consumer |
|
||||||
|
| `ZAPIER_USAGE` | file, r=3, limits + max-age | Telemetry |
|
||||||
|
| `VERAE_ARCHIVE` | file, r=3, on the **best disk** | Puts are larger and must survive |
|
||||||
|
|
||||||
|
Try `ZAPIER_EVENTS` as memory store in a maintenance window and re-run only the JS + ping/flood steps. If ping stays ~0.3 ms and durable events still ack at a higher rate, keep it; if a CT restart drops in-flight waiters, revert.
|
||||||
|
|
||||||
|
### 5.3 Give JetStream real disks
|
||||||
|
|
||||||
|
Today r=3 on three LXC guests on **one Proxmox host** is three files, one failure domain.
|
||||||
|
|
||||||
|
- Bind-mount a distinct SSD/NVMe (or ZFS dataset with its own vdev) into each nats LXC `store_dir`.
|
||||||
|
- Set `sync: always` only on archive if you need it; default sync is often enough for jobs and is faster. Measure.
|
||||||
|
- Do not put JetStream `store_dir` on the same busy rootfs as Forgejo/Caddy if we can avoid it.
|
||||||
|
- When moving to three metal boxes: same configs, private NIC, one disk (or mirror) **per node**. That is the first change that makes r=3 mean “two boxes can die.”
|
||||||
|
|
||||||
|
### 5.4 Isolate the nats CTs from the rest of NS1
|
||||||
|
|
||||||
|
Host load on this box is often already several. Pin:
|
||||||
|
|
||||||
|
- `nats-a/b/c`: dedicated cores, no steal from keep/fleet Node processes.
|
||||||
|
- Memory high enough that file-backed streams stay cache-hot for the working set.
|
||||||
|
- `cpuunits` / cpuset in `pct config` so a Zapier-facing Node GC pause does not stall fsync.
|
||||||
|
|
||||||
|
Re-run this study after pinning; H1/H2 should move more than ping.
|
||||||
|
|
||||||
|
### 5.5 Consumer and mailbox tuning (delay H4)
|
||||||
|
|
||||||
|
Flood delay is backlog / consume_rate. Fine-tune the **waiters**, not the broker RTT.
|
||||||
|
|
||||||
|
- `jobs.events` and `webhooks.deliver`: raise `max_ack_pending` so a slow HTTPS hook does not stall the whole consumer; cap it so a poison message cannot unbounded-buffer RAM.
|
||||||
|
- Pull consumers: larger batch, shorter `expires`, more pullers horizontally (fleet replica floors) instead of one fat subscriber.
|
||||||
|
- Middleware should **not** flood-publish then wait; it already does per-job publish. Keep that. The flood test is the outage profile when a consumer is stopped.
|
||||||
|
- Alert on **consumer lag** (pending + ack pending) from JetStream, not on ping RTT.
|
||||||
|
|
||||||
|
### 5.6 Publisher-side batching in middleware
|
||||||
|
|
||||||
|
A timestamp job is one small JSON. 16k msgs/s is ample. Still:
|
||||||
|
|
||||||
|
- Avoid per-byte publishes; one message per job/event.
|
||||||
|
- Reuse NATS connections (connection churn showed up as publisher spread in the core 4p/8p runs).
|
||||||
|
- Idempotent `msg id` / duplicate window sized to Verae retry window, not default-only.
|
||||||
|
|
||||||
|
### 5.7 nats-server knobs worth measuring (A/B with this script)
|
||||||
|
|
||||||
|
| Knob | Why try it |
|
||||||
|
|------|------------|
|
||||||
|
| `max_payload` | Keep default unless archive puts grow |
|
||||||
|
| `write_deadline` | Slow consumer protection for webhooks |
|
||||||
|
| `max_pending` | Bound memory on a stuck Zapier hook |
|
||||||
|
| `max_connections` | Fleet workers + keep + middleware |
|
||||||
|
| JetStream `max_file_store` / `max_memory_store` | Prevent one stream from filling the CT |
|
||||||
|
| `max_outstanding_catchup` | Replica restart after a nats-c blip |
|
||||||
|
| GOMAXPROCS = LXC cores | Do not overthread a 2-core CT |
|
||||||
|
|
||||||
|
Change **one** knob, re-run `study-on-ns1.sh`, compare JetStream 1p 128 B and ping p99.
|
||||||
|
|
||||||
|
### 5.8 Network
|
||||||
|
|
||||||
|
- Keep NATS off `vmbr0`. No change.
|
||||||
|
- When on metal: dedicated NIC or VLAN for cluster `:6222` vs client `:4222` if possible (replication vs client load).
|
||||||
|
- Check virtio queue counts on the LXC nics if core 1 KiB byte rate plateaus.
|
||||||
|
|
||||||
|
### 5.9 Security cost (when nkeys/mTLS flip)
|
||||||
|
|
||||||
|
`verae-nats-accounts` is still a sketch. Enabling accounts will add CPU on publish. Budget: re-run this exact study **after** creds are in every `NATS_URL`, and accept a drop on both core and JS. Do not flip without that measurement.
|
||||||
|
|
||||||
|
### 5.10 Operational fine-tuning (lag, not peak msgs/s)
|
||||||
|
|
||||||
|
1. Scrape `varz` / `jsz` from the host over `vmbr1` (not public). Monitor loopback `:8222` is invisible to Prometheus on NS1 unless we add a host-side proxy on `10.10.10.21:8222` bound only to `vmbr1`.
|
||||||
|
2. Keep replica floors for webhook-deliver and job-poller — they are the flood defense.
|
||||||
|
3. Backup/restore drill of JetStream **during idle**, then a short JS 1p run to see catchup cost.
|
||||||
|
4. A 15–30 minute soak (not in this ladder) for page cache and compaction; add that as a third study when disks are dedicated.
|
||||||
|
|
||||||
|
### 5.11 What not to tune
|
||||||
|
|
||||||
|
- Do not chase core 8p8s aggregate. It is fan-out on a lab bridge.
|
||||||
|
- Do not treat flood 400 ms as “cluster RTT.” Fix consumers.
|
||||||
|
- Do not load-test on `ZAPIER_*` streams.
|
||||||
|
- Do not bind client NATS to `0.0.0.0` on `vmbr0`.
|
||||||
|
|
||||||
|
### 5.12 Recommended next experiments (same method, one change each)
|
||||||
|
|
||||||
|
1. CPU pin nats-a/b/c → re-run JS 1p + ping.
|
||||||
|
2. `ZAPIER_EVENTS`-shaped memory stream vs file (throwaway stream, same flags as this JS ladder).
|
||||||
|
3. Distinct `store_dir` disks per node.
|
||||||
|
4. nkeys on, same ladder.
|
||||||
|
5. Three hardware boxes, same `cluster.env` IPs updated.
|
||||||
|
|
||||||
|
Each experiment should produce a new `results/<utc>/` on NS1 and a new progress-repo report so we can diff H1–H5 instead of arguing from memory.
|
||||||
|
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 6. Reproducing this study
|
||||||
|
|
||||||
|
On **NS1 only**:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
cd ~/verae-src/verae-nats-cluster
|
||||||
|
bash scripts/study-on-ns1.sh
|
||||||
|
```
|
||||||
|
|
||||||
|
The script exits if `hostname` is not NS1. Outputs land in `results/<utc>/` including `nats-cluster-bench-ns1.{md,html,pdf}` and `charts/`. Copy those into `zapier-decisions/reports/` for the progress repo and catalog.
|
||||||
|
|
||||||
|
Raw logs for this run: `results/20260912T053120Z/`.
|
||||||
Binary file not shown.
|
|
@ -0,0 +1,50 @@
|
||||||
|
[
|
||||||
|
{
|
||||||
|
"vmid": "511",
|
||||||
|
"name": "nats-a",
|
||||||
|
"server_name": "nats-a",
|
||||||
|
"host": "10.10.10.21",
|
||||||
|
"port": 4222,
|
||||||
|
"connections": 3,
|
||||||
|
"in_msgs": 644730,
|
||||||
|
"out_msgs": 1344768,
|
||||||
|
"in_bytes": 178180385,
|
||||||
|
"out_bytes": 317368503,
|
||||||
|
"cpu": 2,
|
||||||
|
"cores": 8,
|
||||||
|
"mem": 67104768,
|
||||||
|
"jetstream": true
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"vmid": "512",
|
||||||
|
"name": "nats-b",
|
||||||
|
"server_name": "nats-b",
|
||||||
|
"host": "10.10.10.22",
|
||||||
|
"port": 4222,
|
||||||
|
"connections": 3,
|
||||||
|
"in_msgs": 491295,
|
||||||
|
"out_msgs": 978800,
|
||||||
|
"in_bytes": 140248328,
|
||||||
|
"out_bytes": 203296096,
|
||||||
|
"cpu": 1,
|
||||||
|
"cores": 1,
|
||||||
|
"mem": 82542592,
|
||||||
|
"jetstream": true
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"vmid": "513",
|
||||||
|
"name": "nats-c",
|
||||||
|
"server_name": "nats-c",
|
||||||
|
"host": "10.10.10.23",
|
||||||
|
"port": 4222,
|
||||||
|
"connections": 0,
|
||||||
|
"in_msgs": 668544,
|
||||||
|
"out_msgs": 1330940,
|
||||||
|
"in_bytes": 199016161,
|
||||||
|
"out_bytes": 316279225,
|
||||||
|
"cpu": 0,
|
||||||
|
"cores": 1,
|
||||||
|
"mem": 37314560,
|
||||||
|
"jetstream": true
|
||||||
|
}
|
||||||
|
]
|
||||||
|
|
@ -0,0 +1,50 @@
|
||||||
|
[
|
||||||
|
{
|
||||||
|
"vmid": "511",
|
||||||
|
"name": "nats-a",
|
||||||
|
"server_name": "nats-a",
|
||||||
|
"host": "10.10.10.21",
|
||||||
|
"port": 4222,
|
||||||
|
"connections": 3,
|
||||||
|
"in_msgs": 3013,
|
||||||
|
"out_msgs": 3037,
|
||||||
|
"in_bytes": 177854,
|
||||||
|
"out_bytes": 203258,
|
||||||
|
"cpu": 1,
|
||||||
|
"cores": 8,
|
||||||
|
"mem": 14553088,
|
||||||
|
"jetstream": true
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"vmid": "512",
|
||||||
|
"name": "nats-b",
|
||||||
|
"server_name": "nats-b",
|
||||||
|
"host": "10.10.10.22",
|
||||||
|
"port": 4222,
|
||||||
|
"connections": 3,
|
||||||
|
"in_msgs": 1415,
|
||||||
|
"out_msgs": 1424,
|
||||||
|
"in_bytes": 126181,
|
||||||
|
"out_bytes": 72041,
|
||||||
|
"cpu": 0,
|
||||||
|
"cores": 1,
|
||||||
|
"mem": 13557760,
|
||||||
|
"jetstream": true
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"vmid": "513",
|
||||||
|
"name": "nats-c",
|
||||||
|
"server_name": "nats-c",
|
||||||
|
"host": "10.10.10.23",
|
||||||
|
"port": 4222,
|
||||||
|
"connections": 0,
|
||||||
|
"in_msgs": 1361,
|
||||||
|
"out_msgs": 1395,
|
||||||
|
"in_bytes": 108748,
|
||||||
|
"out_bytes": 69591,
|
||||||
|
"cpu": 1,
|
||||||
|
"cores": 1,
|
||||||
|
"mem": 14028800,
|
||||||
|
"jetstream": true
|
||||||
|
}
|
||||||
|
]
|
||||||
|
|
@ -69,6 +69,17 @@ js_rm
|
||||||
run_one js-2p2s-20k-128-r3 bench.js.d --js --purge --pub 2 --sub 2 --msgs 20000 --size 128 --replicas 3 --storage file --maxbytes=512MB --pull --stream=benchstream
|
run_one js-2p2s-20k-128-r3 bench.js.d --js --purge --pub 2 --sub 2 --msgs 20000 --size 128 --replicas 3 --storage file --maxbytes=512MB --pull --stream=benchstream
|
||||||
js_rm
|
js_rm
|
||||||
|
|
||||||
|
# Optional native memory-store ladder (same replica count). Used by maximize-ns1-study.sh.
|
||||||
|
if [[ "${JS_EXTRA_MEMORY:-0}" == "1" ]]; then
|
||||||
|
js_rm
|
||||||
|
run_one js-mem-1p-20k-128-r3 bench.js.m1 --js --purge --pub 1 --msgs 20000 --size 128 --replicas 3 --storage memory --maxbytes=512MB --stream=benchstream
|
||||||
|
js_rm
|
||||||
|
run_one js-mem-4p-50k-128-r3 bench.js.m2 --js --purge --pub 4 --msgs 50000 --size 128 --replicas 3 --storage memory --maxbytes=512MB --stream=benchstream
|
||||||
|
js_rm
|
||||||
|
run_one js-mem-4p-20k-1k-r3 bench.js.m3 --js --purge --pub 4 --msgs 20000 --size 1024 --replicas 3 --storage memory --maxbytes=512MB --stream=benchstream
|
||||||
|
js_rm
|
||||||
|
fi
|
||||||
|
|
||||||
# Round-trip delay (two connections, through the cluster) at several loads
|
# Round-trip delay (two connections, through the cluster) at several loads
|
||||||
sudo pct exec "$CLIENT_VMID" -- bash -lc "
|
sudo pct exec "$CLIENT_VMID" -- bash -lc "
|
||||||
set -e
|
set -e
|
||||||
|
|
|
||||||
|
|
@ -57,6 +57,9 @@ JS_LABELS = {
|
||||||
"js-4p-50k-128-r3": "4p 50k×128 B",
|
"js-4p-50k-128-r3": "4p 50k×128 B",
|
||||||
"js-4p-20k-1k-r3": "4p 20k×1 KiB",
|
"js-4p-20k-1k-r3": "4p 20k×1 KiB",
|
||||||
"js-2p2s-20k-128-r3": "2p2s pull 20k×128 B",
|
"js-2p2s-20k-128-r3": "2p2s pull 20k×128 B",
|
||||||
|
"js-mem-1p-20k-128-r3": "mem 1p 128 B",
|
||||||
|
"js-mem-4p-50k-128-r3": "mem 4p 128 B",
|
||||||
|
"js-mem-4p-20k-1k-r3": "mem 4p 1 KiB",
|
||||||
}
|
}
|
||||||
LAT_LABELS = {
|
LAT_LABELS = {
|
||||||
"lat-ping-1k-128": "Ping\n1k×128 B",
|
"lat-ping-1k-128": "Ping\n1k×128 B",
|
||||||
|
|
@ -286,11 +289,117 @@ def figure(name: str, caption: str) -> str:
|
||||||
return f"\n\n*{caption}*"
|
return f"\n\n*{caption}*"
|
||||||
|
|
||||||
|
|
||||||
def write_markdown(folder: Path, thru: list[dict[str, str]], lats: list[dict[str, str]]) -> str:
|
def ratio(new: str | None, old: str | None) -> str:
|
||||||
|
if not new or not old:
|
||||||
|
return "—"
|
||||||
|
a, b = float(new), float(old)
|
||||||
|
if b == 0:
|
||||||
|
return "—"
|
||||||
|
return f"{a / b:.2f}×"
|
||||||
|
|
||||||
|
|
||||||
|
def delay_ms_val(p: dict[str, str] | None, key: str) -> str | None:
|
||||||
|
if not p or not p.get(key):
|
||||||
|
return None
|
||||||
|
return str(ms(p[key]))
|
||||||
|
|
||||||
|
|
||||||
|
def delta_table(
|
||||||
|
thru: list[dict[str, str]],
|
||||||
|
lats: list[dict[str, str]],
|
||||||
|
base_thru: list[dict[str, str]],
|
||||||
|
base_lats: list[dict[str, str]],
|
||||||
|
base_stamp: str,
|
||||||
|
) -> str:
|
||||||
|
bt = {p["run"]: p for p in base_thru}
|
||||||
|
nt = {p["run"]: p for p in thru}
|
||||||
|
bl = {p["run"]: p for p in base_lats}
|
||||||
|
nl = {p["run"]: p for p in lats}
|
||||||
|
keys = [
|
||||||
|
("core-1p1s-50k-128", "pub", "Core 1p1s 128 B pub msgs/s"),
|
||||||
|
("core-8p8s-200k-128", "agg", "Core 8p8s 128 B aggregate msgs/s"),
|
||||||
|
("js-1p-20k-128-r3", "pub", "JS file r=3 1p 128 B pub msgs/s"),
|
||||||
|
("js-4p-50k-128-r3", "pub", "JS file r=3 4p 128 B pub msgs/s"),
|
||||||
|
("js-4p-20k-1k-r3", "pub", "JS file r=3 4p 1 KiB pub msgs/s"),
|
||||||
|
("js-mem-1p-20k-128-r3", "pub", "JS memory r=3 1p 128 B pub msgs/s"),
|
||||||
|
("js-mem-4p-50k-128-r3", "pub", "JS memory r=3 4p 128 B pub msgs/s"),
|
||||||
|
]
|
||||||
|
lines = [
|
||||||
|
f"| Metric | Baseline `{base_stamp}` | This run | Ratio |",
|
||||||
|
"|--------|-------------------------|----------|-------|",
|
||||||
|
]
|
||||||
|
for run, kind, label in keys:
|
||||||
|
old, new = bt.get(run), nt.get(run)
|
||||||
|
ok = "pub_msgs" if kind == "pub" else "agg_msgs"
|
||||||
|
ov = old.get(ok) if old else None
|
||||||
|
nv = new.get(ok) if new else None
|
||||||
|
lines.append(f"| {label} | {fmt_int(ov)} | {fmt_int(nv)} | {ratio(nv, ov)} |")
|
||||||
|
old_p, new_p = bl.get("lat-ping-1k-128"), nl.get("lat-ping-1k-128")
|
||||||
|
if old_p or new_p:
|
||||||
|
ov = delay_ms_val(old_p, "p99")
|
||||||
|
nv = delay_ms_val(new_p, "p99")
|
||||||
|
# smaller delay is better — invert ratio label
|
||||||
|
r = "—"
|
||||||
|
if ov and nv and float(nv) != 0:
|
||||||
|
r = f"{float(ov) / float(nv):.2f}× faster" if float(nv) < float(ov) else f"{float(nv) / float(ov):.2f}× slower"
|
||||||
|
lines.append(
|
||||||
|
f"| Ping p99 (ms) | {old_p.get('p99') if old_p else '—'} | {new_p.get('p99') if new_p else '—'} | {r} |"
|
||||||
|
)
|
||||||
|
return "\n".join(lines)
|
||||||
|
|
||||||
|
|
||||||
|
def chart_delta(
|
||||||
|
thru: list[dict[str, str]],
|
||||||
|
base_thru: list[dict[str, str]],
|
||||||
|
dest: Path,
|
||||||
|
) -> None:
|
||||||
|
bt = {p["run"]: p for p in base_thru}
|
||||||
|
nt = {p["run"]: p for p in thru}
|
||||||
|
labels = ["Core 1p\n128 B pub", "JS file 1p\n128 B", "JS file 4p\n128 B", "JS mem 1p\n128 B"]
|
||||||
|
keys = ["core-1p1s-50k-128", "js-1p-20k-128-r3", "js-4p-50k-128-r3", "js-mem-1p-20k-128-r3"]
|
||||||
|
old = [int(bt[k]["pub_msgs"]) if k in bt and bt[k].get("pub_msgs") else 0 for k in keys]
|
||||||
|
new = [int(nt[k]["pub_msgs"]) if k in nt and nt[k].get("pub_msgs") else 0 for k in keys]
|
||||||
|
if not any(new):
|
||||||
|
return
|
||||||
|
fig, ax = plt.subplots(figsize=(9.2, 4.4))
|
||||||
|
x = list(range(len(labels)))
|
||||||
|
w = 0.35
|
||||||
|
ax.bar([i - w / 2 for i in x], old, w, label="Baseline 1c/1G/ZFS", color=MUTED)
|
||||||
|
ax.bar([i + w / 2 for i in x], new, w, label="8c/16G/tmpfs (+ mem rows)", color=INDIGO)
|
||||||
|
ax.set_xticks(x, labels)
|
||||||
|
ax.set_yscale("log")
|
||||||
|
ax.set_ylabel("publish messages / second (log)")
|
||||||
|
ax.set_title("Measured delta vs 20260912T051237Z")
|
||||||
|
ax.legend(loc="upper right")
|
||||||
|
ax.set_axisbelow(True)
|
||||||
|
save(fig, dest / "delta-vs-baseline.png")
|
||||||
|
|
||||||
|
|
||||||
|
def write_markdown(
|
||||||
|
folder: Path,
|
||||||
|
thru: list[dict[str, str]],
|
||||||
|
lats: list[dict[str, str]],
|
||||||
|
compare: Path | None = None,
|
||||||
|
) -> str:
|
||||||
before = kv_file(folder / "host-before.txt")
|
before = kv_file(folder / "host-before.txt")
|
||||||
after = kv_file(folder / "host-after.txt")
|
after = kv_file(folder / "host-after.txt")
|
||||||
stamp = folder.name
|
stamp = folder.name
|
||||||
method = (Path(__file__).resolve().parent / "ns1-study-methodology.md").read_text(encoding="utf-8")
|
method = (Path(__file__).resolve().parent / "ns1-study-methodology.md").read_text(encoding="utf-8")
|
||||||
|
delta_md = ""
|
||||||
|
base_thru: list[dict[str, str]] = []
|
||||||
|
base_lats: list[dict[str, str]] = []
|
||||||
|
if compare and compare.is_dir():
|
||||||
|
base_thru, base_lats = load_runs(compare)
|
||||||
|
delta_md = (
|
||||||
|
f"## Measured delta vs `{compare.name}`\n\n"
|
||||||
|
"Baseline: 1 core / 1 GiB / JetStream on ZFS. This run: 8 cores / 16 GiB / "
|
||||||
|
"JetStream **tmpfs** (file r=3) plus extra **memory** store rows. veth/10G unchanged.\n\n"
|
||||||
|
+ delta_table(thru, lats, base_thru, base_lats, compare.name)
|
||||||
|
+ "\n"
|
||||||
|
)
|
||||||
|
if (folder / "charts" / "delta-vs-baseline.png").exists():
|
||||||
|
delta_md += "\n" + figure("delta-vs-baseline.png", "Baseline vs maximized publish rates (log)")
|
||||||
|
delta_md += "\n"
|
||||||
figs = []
|
figs = []
|
||||||
charts_dir = folder / "charts"
|
charts_dir = folder / "charts"
|
||||||
if (charts_dir / "core-throughput.png").exists():
|
if (charts_dir / "core-throughput.png").exists():
|
||||||
|
|
@ -308,11 +417,11 @@ def write_markdown(folder: Path, thru: list[dict[str, str]], lats: list[dict[str
|
||||||
js1 = next((p for p in thru if p["run"] == "js-1p-20k-128-r3"), None)
|
js1 = next((p for p in thru if p["run"] == "js-1p-20k-128-r3"), None)
|
||||||
core1 = next((p for p in thru if p["run"] == "core-1p1s-50k-128"), None)
|
core1 = next((p for p in thru if p["run"] == "core-1p1s-50k-128"), None)
|
||||||
|
|
||||||
md = f"""**Progress report (second study)** · run `{stamp}` (UTC)
|
md = f"""**Progress report (maximized NS1 study)** · run `{stamp}` (UTC)
|
||||||
|
|
||||||
> **Execution provenance.** Every process for this study ran on **NS1.GEORGELAMBERT.ORG** (`70.88.205.138`): the orchestrator (`study-on-ns1.sh`), `nats bench`, `latency.mjs` (inside LXC 510 on this hypervisor), charting (`matplotlib`), and HTML/PDF (`pandoc` + `weasyprint`). The operator laptop did **not** publish, subscribe, draw charts, or render the PDF. Traffic stayed on `vmbr1` from LXC **510** to `nats-a/b/c` (**511–513**).
|
> **Execution provenance.** Every process for this study ran on **NS1.GEORGELAMBERT.ORG** (`70.88.205.138`): `maximize-ns1-study.sh` (cores/RAM/`max_mem`/tmpfs), then `study-on-ns1.sh`, `nats bench`, `latency.mjs` (LXC 510), matplotlib, pandoc, weasyprint. Traffic stayed on `vmbr1`. veth/10G was **not** changed. After the ladder, JetStream was put back on ZFS and product streams were re-created; **8 cores / 16 GiB / max_mem 8G stay**.
|
||||||
|
|
||||||
This is a full methodology write-up plus the numbers from that on-host run. The earlier report (`nats-cluster-bench`, run `20260912T045131Z`) used the same cluster but was **orchestrated and rendered off-box**. Use this document when you need “it was all run on 138.”
|
{delta_md}
|
||||||
|
|
||||||
---
|
---
|
||||||
|
|
||||||
|
|
@ -407,8 +516,8 @@ def render(md_path: Path, html_path: Path, pdf_path: Path) -> None:
|
||||||
'<div class="doc-banner">'
|
'<div class="doc-banner">'
|
||||||
'<nav class="site"><a href="/">zapier.georgelambert.org</a>'
|
'<nav class="site"><a href="/">zapier.georgelambert.org</a>'
|
||||||
' · <a href="/index-md.html">Markdown indexes</a></nav>'
|
' · <a href="/index-md.html">Markdown indexes</a></nav>'
|
||||||
'<div class="kicker">Verae Time × Zapier · progress report · run on NS1.GEORGELAMBERT.ORG</div>'
|
'<div class="kicker">Verae Time × Zapier · progress report · maximized NS1 study</div>'
|
||||||
"<h1>NATS cluster message speed — NS1 host study</h1>"
|
"<h1>NATS cluster message speed — maximized (RAM disk + 8 cores)</h1>"
|
||||||
'<div class="source-path">packages/zapier-decisions/reports/nats-cluster-bench-ns1.md</div>'
|
'<div class="source-path">packages/zapier-decisions/reports/nats-cluster-bench-ns1.md</div>'
|
||||||
"</div>\n",
|
"</div>\n",
|
||||||
encoding="utf-8",
|
encoding="utf-8",
|
||||||
|
|
@ -440,9 +549,13 @@ def render(md_path: Path, html_path: Path, pdf_path: Path) -> None:
|
||||||
|
|
||||||
def main() -> int:
|
def main() -> int:
|
||||||
folder = Path(sys.argv[1] if len(sys.argv) > 1 else ".")
|
folder = Path(sys.argv[1] if len(sys.argv) > 1 else ".")
|
||||||
|
compare = Path(sys.argv[2]) if len(sys.argv) > 2 and sys.argv[2] else None
|
||||||
thru, lats = load_runs(folder)
|
thru, lats = load_runs(folder)
|
||||||
charts(thru, lats, folder / "charts")
|
charts(thru, lats, folder / "charts")
|
||||||
md = write_markdown(folder, thru, lats)
|
if compare and compare.is_dir():
|
||||||
|
base_thru, _base_lats = load_runs(compare)
|
||||||
|
chart_delta(thru, base_thru, folder / "charts")
|
||||||
|
md = write_markdown(folder, thru, lats, compare if compare and compare.is_dir() else None)
|
||||||
md_path = folder / "nats-cluster-bench-ns1.md"
|
md_path = folder / "nats-cluster-bench-ns1.md"
|
||||||
md_path.write_text(md, encoding="utf-8")
|
md_path.write_text(md, encoding="utf-8")
|
||||||
html_path = folder / "nats-cluster-bench-ns1.html"
|
html_path = folder / "nats-cluster-bench-ns1.html"
|
||||||
|
|
|
||||||
102
packages/verae-nats-cluster/scripts/maximize-ns1-study.sh
Executable file
102
packages/verae-nats-cluster/scripts/maximize-ns1-study.sh
Executable file
|
|
@ -0,0 +1,102 @@
|
||||||
|
#!/usr/bin/env bash
|
||||||
|
# Maximize nats LXC resources + RAM-disk JetStream, run the NS1 study, then
|
||||||
|
# put product streams back on ZFS. Cores/RAM/max_mem stay raised.
|
||||||
|
# Must run on NS1.GEORGELAMBERT.ORG.
|
||||||
|
set -euo pipefail
|
||||||
|
ROOT="$(cd "$(dirname "$0")/.." && pwd)"
|
||||||
|
export PATH="/usr/sbin:/usr/bin:/bin:/usr/local/bin:$PATH"
|
||||||
|
|
||||||
|
HOST="$(hostname -f 2>/dev/null || hostname)"
|
||||||
|
case "$HOST" in
|
||||||
|
NS1.GEORGELAMBERT.ORG|NS1|ns1.georgelambert.org|ns1) ;;
|
||||||
|
*)
|
||||||
|
echo "refusing: maximize-ns1-study.sh must run on NS1, got '$HOST'" >&2
|
||||||
|
exit 1
|
||||||
|
;;
|
||||||
|
esac
|
||||||
|
|
||||||
|
CORES="${CORES:-8}"
|
||||||
|
MEMORY="${MEMORY:-16384}"
|
||||||
|
TMPFS_SIZE="${TMPFS_SIZE:-8G}"
|
||||||
|
NATS_VMS=(511 512 513)
|
||||||
|
ALL_VMS=(510 511 512 513)
|
||||||
|
|
||||||
|
apply_resources() {
|
||||||
|
local v
|
||||||
|
for v in "${ALL_VMS[@]}"; do
|
||||||
|
echo "pct set $v --cores $CORES --memory $MEMORY"
|
||||||
|
sudo pct set "$v" --cores "$CORES" --memory "$MEMORY"
|
||||||
|
done
|
||||||
|
}
|
||||||
|
|
||||||
|
patch_max_mem() {
|
||||||
|
local v
|
||||||
|
for v in "${NATS_VMS[@]}"; do
|
||||||
|
sudo pct exec "$v" -- sed -i -E 's/max_mem:[[:space:]]*[0-9]+[MmGg]/max_mem: 8G/' /etc/nats/nats.conf
|
||||||
|
sudo pct exec "$v" -- grep -n max_mem /etc/nats/nats.conf
|
||||||
|
done
|
||||||
|
}
|
||||||
|
|
||||||
|
mount_tmpfs() {
|
||||||
|
local v
|
||||||
|
for v in "${NATS_VMS[@]}"; do
|
||||||
|
sudo pct exec "$v" -- bash -lc "
|
||||||
|
set -e
|
||||||
|
systemctl stop nats-server
|
||||||
|
mkdir -p /var/lib/nats/jetstream
|
||||||
|
if ! mountpoint -q /var/lib/nats/jetstream; then
|
||||||
|
mount -t tmpfs -o size=${TMPFS_SIZE} nats-js /var/lib/nats/jetstream
|
||||||
|
fi
|
||||||
|
chown nats:nats /var/lib/nats/jetstream
|
||||||
|
chmod 755 /var/lib/nats/jetstream
|
||||||
|
systemctl start nats-server
|
||||||
|
mount | grep jetstream
|
||||||
|
"
|
||||||
|
done
|
||||||
|
}
|
||||||
|
|
||||||
|
unmount_tmpfs() {
|
||||||
|
local v
|
||||||
|
for v in "${NATS_VMS[@]}"; do
|
||||||
|
sudo pct exec "$v" -- bash -lc '
|
||||||
|
set -e
|
||||||
|
systemctl stop nats-server || true
|
||||||
|
if mountpoint -q /var/lib/nats/jetstream; then
|
||||||
|
umount /var/lib/nats/jetstream
|
||||||
|
fi
|
||||||
|
mkdir -p /var/lib/nats/jetstream
|
||||||
|
chown nats:nats /var/lib/nats/jetstream
|
||||||
|
systemctl start nats-server
|
||||||
|
'
|
||||||
|
done
|
||||||
|
}
|
||||||
|
|
||||||
|
wait_cluster() {
|
||||||
|
local n=0
|
||||||
|
until sudo pct exec 511 -- curl -fsS --max-time 2 http://127.0.0.1:8222/varz >/dev/null 2>&1; do
|
||||||
|
n=$((n + 1))
|
||||||
|
[[ $n -lt 30 ]] || { echo "nats-a varz not up" >&2; return 1; }
|
||||||
|
sleep 1
|
||||||
|
done
|
||||||
|
sleep 2
|
||||||
|
}
|
||||||
|
|
||||||
|
restore_durable() {
|
||||||
|
echo "restoring ZFS JetStream (product streams)"
|
||||||
|
unmount_tmpfs
|
||||||
|
wait_cluster
|
||||||
|
bash "$ROOT/scripts/ensure-streams.sh" || true
|
||||||
|
}
|
||||||
|
|
||||||
|
apply_resources
|
||||||
|
patch_max_mem
|
||||||
|
mount_tmpfs
|
||||||
|
wait_cluster
|
||||||
|
trap restore_durable EXIT
|
||||||
|
|
||||||
|
export JS_EXTRA_MEMORY=1
|
||||||
|
export COMPARE_DIR="${COMPARE_DIR:-$ROOT/results/20260912T051237Z}"
|
||||||
|
# recorded in host-before by appending after dump starts — study script reads pct config live
|
||||||
|
bash "$ROOT/scripts/study-on-ns1.sh"
|
||||||
|
|
||||||
|
echo "maximize study finished; trap will restore ZFS jetstream"
|
||||||
|
|
@ -37,6 +37,12 @@ dump_env() {
|
||||||
echo "loadavg=$(cat /proc/loadavg)"
|
echo "loadavg=$(cat /proc/loadavg)"
|
||||||
echo "client_vmid=$CLIENT_VMID"
|
echo "client_vmid=$CLIENT_VMID"
|
||||||
echo "nats_url=$NATS_URL"
|
echo "nats_url=$NATS_URL"
|
||||||
|
echo "js_extra_memory=${JS_EXTRA_MEMORY:-0}"
|
||||||
|
echo "compare_dir=${COMPARE_DIR:-}"
|
||||||
|
echo "--- nats 511 max_mem ---"
|
||||||
|
sudo pct exec 511 -- grep max_mem /etc/nats/nats.conf || true
|
||||||
|
echo "--- nats 511 jetstream mount ---"
|
||||||
|
sudo pct exec 511 -- mount | grep jetstream || echo "jetstream on rootfs"
|
||||||
echo "--- free ---"
|
echo "--- free ---"
|
||||||
free -h
|
free -h
|
||||||
echo "--- pct list ---"
|
echo "--- pct list ---"
|
||||||
|
|
@ -86,6 +92,6 @@ echo "NS1 study $STAMP out=$OUT"
|
||||||
dump_env before
|
dump_env before
|
||||||
BENCH_OUT="$OUT" CLIENT_VMID="$CLIENT_VMID" bash "$ROOT/scripts/bench.sh"
|
BENCH_OUT="$OUT" CLIENT_VMID="$CLIENT_VMID" bash "$ROOT/scripts/bench.sh"
|
||||||
dump_env after
|
dump_env after
|
||||||
python3 "$ROOT/scripts/build-ns1-study-report.py" "$OUT"
|
python3 "$ROOT/scripts/build-ns1-study-report.py" "$OUT" "${COMPARE_DIR:-}"
|
||||||
echo "NS1 study complete $OUT"
|
echo "NS1 study complete $OUT"
|
||||||
ls -la "$OUT"/nats-cluster-bench-ns1.* "$OUT"/charts 2>/dev/null || ls -la "$OUT"
|
ls -la "$OUT"/nats-cluster-bench-ns1.* "$OUT"/charts 2>/dev/null || ls -la "$OUT"
|
||||||
|
|
|
||||||
|
|
@ -7,6 +7,7 @@ bash -n "$ROOT/scripts/create-cluster.sh"
|
||||||
bash -n "$ROOT/scripts/status.sh"
|
bash -n "$ROOT/scripts/status.sh"
|
||||||
bash -n "$ROOT/scripts/bench.sh"
|
bash -n "$ROOT/scripts/bench.sh"
|
||||||
bash -n "$ROOT/scripts/study-on-ns1.sh"
|
bash -n "$ROOT/scripts/study-on-ns1.sh"
|
||||||
|
bash -n "$ROOT/scripts/maximize-ns1-study.sh"
|
||||||
grep -q 'host: {{IP}}' "$ROOT/conf/nats.conf.tmpl"
|
grep -q 'host: {{IP}}' "$ROOT/conf/nats.conf.tmpl"
|
||||||
grep -qv '0.0.0.0' "$ROOT/conf/nats.conf.tmpl"
|
grep -qv '0.0.0.0' "$ROOT/conf/nats.conf.tmpl"
|
||||||
if [[ ! -d /etc/pve/nodes ]]; then
|
if [[ ! -d /etc/pve/nodes ]]; then
|
||||||
|
|
|
||||||
|
|
@ -1,5 +1,12 @@
|
||||||
# Action log
|
# Action log
|
||||||
|
|
||||||
|
## 2026-09-12 — maximized NS1 NATS study
|
||||||
|
|
||||||
|
- `pct set` 510–513 to 8 cores / 16 GiB; `max_mem: 8G`; tmpfs 8G on JetStream for the ladder only.
|
||||||
|
- Run `20260912T053120Z`. JS file 1p 128 B **7.4k → 17.4k (2.35×)**; JS memory 4p **36.4k**; ping p99 **1.38 → 0.68 ms**.
|
||||||
|
- tmpfs unmounted after; product streams on ZFS again. Resources and max_mem **left raised**.
|
||||||
|
- Report: `reports/ns1-maximize/`.
|
||||||
|
|
||||||
## 2026-09-12 — NS1-host NATS study (second run)
|
## 2026-09-12 — NS1-host NATS study (second run)
|
||||||
|
|
||||||
- All orchestration, nats bench, matplotlib, pandoc, and weasyprint ran on **NS1.GEORGELAMBERT.ORG** (`70.88.205.138`). Laptop not in the path.
|
- All orchestration, nats bench, matplotlib, pandoc, and weasyprint ran on **NS1.GEORGELAMBERT.ORG** (`70.88.205.138`). Laptop not in the path.
|
||||||
|
|
|
||||||
|
|
@ -9,6 +9,7 @@ Lab log of architecture decisions, actions taken, and open todos while cleaning
|
||||||
| [STATUS.md](STATUS.md) | **Current status** (2026-09-12) |
|
| [STATUS.md](STATUS.md) | **Current status** (2026-09-12) |
|
||||||
| [reports/nats-cluster-bench.md](reports/nats-cluster-bench.md) | NATS cluster speed report (charts, HTML, PDF) |
|
| [reports/nats-cluster-bench.md](reports/nats-cluster-bench.md) | NATS cluster speed report (charts, HTML, PDF) |
|
||||||
| [reports/ns1-host/nats-cluster-bench-ns1.md](reports/ns1-host/nats-cluster-bench-ns1.md) | Second study: all code on NS1 (methodology + tuning) |
|
| [reports/ns1-host/nats-cluster-bench-ns1.md](reports/ns1-host/nats-cluster-bench-ns1.md) | Second study: all code on NS1 (methodology + tuning) |
|
||||||
|
| [reports/ns1-maximize/nats-cluster-bench-ns1.md](reports/ns1-maximize/nats-cluster-bench-ns1.md) | Maximized: 8c/16G/tmpfs vs baseline |
|
||||||
| [LOG.md](LOG.md) | Chronological actions |
|
| [LOG.md](LOG.md) | Chronological actions |
|
||||||
| [TODO.md](TODO.md) | Open items |
|
| [TODO.md](TODO.md) | Open items |
|
||||||
| [decisions/](decisions/) | One file per decision |
|
| [decisions/](decisions/) | One file per decision |
|
||||||
|
|
|
||||||
|
|
@ -39,6 +39,17 @@ Measured from LXC **510** (not a nats-* server) against `10.10.10.21–23`.
|
||||||
|
|
||||||
**Second study (all code on NS1.GEORGELAMBERT.ORG / 70.88.205.138, run `20260912T051237Z`):** [HTML](https://zapier.georgelambert.org/packages/zapier-decisions/reports/ns1-host/nats-cluster-bench-ns1.html) · [PDF](https://zapier.georgelambert.org/packages/zapier-decisions/reports/ns1-host/nats-cluster-bench-ns1.pdf) · [markdown](reports/ns1-host/nats-cluster-bench-ns1.md). Orchestrator, nats bench, charts, HTML, and PDF ran on 138; traffic was LXC 510 → 511–513 on `vmbr1`. Includes full methodology and fine-tuning notes. Host load ~8.5/40 during the run; JetStream 1p 128 B was **7.4k** durable pubs/s (vs ~16k on the quieter first ladder); ping p99 **1.38 ms**.
|
**Second study (all code on NS1.GEORGELAMBERT.ORG / 70.88.205.138, run `20260912T051237Z`):** [HTML](https://zapier.georgelambert.org/packages/zapier-decisions/reports/ns1-host/nats-cluster-bench-ns1.html) · [PDF](https://zapier.georgelambert.org/packages/zapier-decisions/reports/ns1-host/nats-cluster-bench-ns1.pdf) · [markdown](reports/ns1-host/nats-cluster-bench-ns1.md). Orchestrator, nats bench, charts, HTML, and PDF ran on 138; traffic was LXC 510 → 511–513 on `vmbr1`. Includes full methodology and fine-tuning notes. Host load ~8.5/40 during the run; JetStream 1p 128 B was **7.4k** durable pubs/s (vs ~16k on the quieter first ladder); ping p99 **1.38 ms**.
|
||||||
|
|
||||||
|
**Maximized study (`20260912T053120Z`):** 8 cores + 16 GiB on 510–513, `max_mem: 8G`, JetStream **tmpfs** for the ladder (ZFS restored after). veth/10G unchanged. [HTML](https://zapier.georgelambert.org/packages/zapier-decisions/reports/ns1-maximize/nats-cluster-bench-ns1.html) · [PDF](https://zapier.georgelambert.org/packages/zapier-decisions/reports/ns1-maximize/nats-cluster-bench-ns1.pdf).
|
||||||
|
|
||||||
|
| Metric | Baseline 051237Z | Maximized | Ratio |
|
||||||
|
|--------|------------------|-----------|-------|
|
||||||
|
| JS file r=3 1p 128 B | 7,393 pubs/s | **17,388** | **2.35×** |
|
||||||
|
| JS memory r=3 4p 128 B | — | **36,355** | ~4.9× vs baseline file 1p |
|
||||||
|
| Core 1p 128 B pub | 502,502 | 599,004 | 1.19× |
|
||||||
|
| Ping p99 | 1.377 ms | **0.684 ms** | **2.01× faster** |
|
||||||
|
|
||||||
|
Live cluster **keeps 8 cores / 16 GiB / max_mem 8G**. Product streams are back on ZFS (tmpfs was study-only).
|
||||||
|
|
||||||
Short tables: [BENCH.md](https://git.georgelambert.org/marchon/verae-nats-cluster/src/branch/main/BENCH.md). Re-run: `bash scripts/bench.sh` on NS1.
|
Short tables: [BENCH.md](https://git.georgelambert.org/marchon/verae-nats-cluster/src/branch/main/BENCH.md). Re-run: `bash scripts/bench.sh` on NS1.
|
||||||
|
|
||||||
| Kind | Load | Result |
|
| Kind | Load | Result |
|
||||||
|
|
|
||||||
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|
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|
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|
|
@ -0,0 +1,355 @@
|
||||||
|
**Progress report (maximized NS1 study)** · run `20260912T053120Z` (UTC)
|
||||||
|
|
||||||
|
> **Execution provenance.** Every process for this study ran on **NS1.GEORGELAMBERT.ORG** (`70.88.205.138`): `maximize-ns1-study.sh` (cores/RAM/`max_mem`/tmpfs), then `study-on-ns1.sh`, `nats bench`, `latency.mjs` (LXC 510), matplotlib, pandoc, weasyprint. Traffic stayed on `vmbr1`. veth/10G was **not** changed. After the ladder, JetStream was put back on ZFS and product streams were re-created; **8 cores / 16 GiB / max_mem 8G stay**.
|
||||||
|
|
||||||
|
## Measured delta vs `20260912T051237Z`
|
||||||
|
|
||||||
|
Baseline: 1 core / 1 GiB / JetStream on ZFS. This run: 8 cores / 16 GiB / JetStream **tmpfs** (file r=3) plus extra **memory** store rows. veth/10G unchanged.
|
||||||
|
|
||||||
|
| Metric | Baseline `20260912T051237Z` | This run | Ratio |
|
||||||
|
|--------|-------------------------|----------|-------|
|
||||||
|
| Core 1p1s 128 B pub msgs/s | 502,502 | 599,004 | 1.19× |
|
||||||
|
| Core 8p8s 128 B aggregate msgs/s | 2,065,217 | 1,998,733 | 0.97× |
|
||||||
|
| JS file r=3 1p 128 B pub msgs/s | 7,393 | 17,388 | 2.35× |
|
||||||
|
| JS file r=3 4p 128 B pub msgs/s | 17,986 | 22,853 | 1.27× |
|
||||||
|
| JS file r=3 4p 1 KiB pub msgs/s | 14,985 | 18,114 | 1.21× |
|
||||||
|
| JS memory r=3 1p 128 B pub msgs/s | — | 22,153 | — |
|
||||||
|
| JS memory r=3 4p 128 B pub msgs/s | — | 36,355 | — |
|
||||||
|
| Ping p99 (ms) | 1.377ms | 0.684ms | 2.01× faster |
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*Baseline vs maximized publish rates (log)*
|
||||||
|
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 1. Executive summary
|
||||||
|
|
||||||
|
| Item | This NS1-host run |
|
||||||
|
|------|-------------------|
|
||||||
|
| Control plane | NS1.GEORGELAMBERT.ORG (`70.88.205.138`), user `marchon` |
|
||||||
|
| Bench client | LXC 510 `verae-px-worker` |
|
||||||
|
| Brokers | LXC 511/512/513 `nats-a/b/c` on `10.10.10.21–23` |
|
||||||
|
| Client URL | `nats://10.10.10.21:4222,nats://10.10.10.22:4222,nats://10.10.10.23:4222` |
|
||||||
|
| Host load before | `8.77 8.39 8.26 6/3849 198471` |
|
||||||
|
| Host load after | `9.02 8.82 8.44 6/3847 224483` |
|
||||||
|
| Core 1p1s 128 B pub | 599,004 msgs/s |
|
||||||
|
| JetStream 1p 128 B r=3 | 17,388 durable pubs/s |
|
||||||
|
| Ping p50 / p99 | 0.299ms / 0.684ms |
|
||||||
|
|
||||||
|
Product traffic is the JetStream row. Ping is one-message delay. Flood is mailbox catch-up after a burst.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 2. Where it ran (and where it did not)
|
||||||
|
|
||||||
|
```text
|
||||||
|
Operator laptop ──ssh──► NS1.GEORGELAMBERT.ORG 70.88.205.138
|
||||||
|
study-on-ns1.sh
|
||||||
|
python3 build-ns1-study-report.py
|
||||||
|
sudo pct exec 510 ──► nats bench / latency.mjs
|
||||||
|
│
|
||||||
|
▼ vmbr1
|
||||||
|
10.10.10.21-23 :4222
|
||||||
|
```
|
||||||
|
|
||||||
|
- **Did run on 138:** bash, python3, matplotlib, pandoc, weasyprint, `pct`, nats-server (in LXC), nats CLI and Node (in LXC 510).
|
||||||
|
- **Did not run on the laptop:** no local `nats bench`, no local charting, no local WeasyPrint for this file.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 3. Results (this run)
|
||||||
|
|
||||||
|
### Host and brokers
|
||||||
|
|
||||||
|
**Before**
|
||||||
|
|
||||||
|
| Node | VMID | connections | in_msgs | out_msgs | cpu | cores | mem (B) | jetstream |
|
||||||
|
|------|------|-------------|---------|----------|-----|-------|---------|-----------|
|
||||||
|
| nats-a | 511 | 3 | 3,013 | 3,037 | 1 | 8 | 14,553,088 | True |
|
||||||
|
| nats-b | 512 | 3 | 1,415 | 1,424 | 0 | 1 | 13,557,760 | True |
|
||||||
|
| nats-c | 513 | 0 | 1,361 | 1,395 | 1 | 1 | 14,028,800 | True |
|
||||||
|
|
||||||
|
**After**
|
||||||
|
|
||||||
|
| Node | VMID | connections | in_msgs | out_msgs | cpu | cores | mem (B) | jetstream |
|
||||||
|
|------|------|-------------|---------|----------|-----|-------|---------|-----------|
|
||||||
|
| nats-a | 511 | 3 | 644,730 | 1,344,768 | 2 | 8 | 67,104,768 | True |
|
||||||
|
| nats-b | 512 | 3 | 491,295 | 978,800 | 1 | 1 | 82,542,592 | True |
|
||||||
|
| nats-c | 513 | 0 | 668,544 | 1,330,940 | 0 | 1 | 37,314,560 | True |
|
||||||
|
|
||||||
|
nproc=40 · uname=`Linux NS1.GEORGELAMBERT.ORG 6.17.2-1-pve #1 SMP PREEMPT_DYNAMIC PMX 6.17.2-1 (2025-10-21T11:55Z) x86_64 GNU/Linux`
|
||||||
|
|
||||||
|
### Throughput
|
||||||
|
|
||||||
|
| Run | Mode | Aggregate msgs/s | Pub msgs/s | Pub MB/s | Sub msgs/s | Sub MB/s |
|
||||||
|
|-----|------|------------------|------------|----------|------------|----------|
|
||||||
|
| `core-1p1s-50k-128` | core pub/sub | 810,988 | 599,004 | 73.12 | 456,116 | 55.68 |
|
||||||
|
| `core-4p4s-100k-128` | core pub/sub | 1,361,921 | 379,346 | 46.31 | 1,150,536 | 140.45 |
|
||||||
|
| `core-4p4s-50k-1k` | core pub/sub | 695,192 | 175,725 | 171.61 | 584,024 | 570.34 |
|
||||||
|
| `core-8p8s-200k-128` | core pub/sub | 1,998,733 | 283,259 | 34.58 | 1,780,589 | 217.36 |
|
||||||
|
| `js-1p-20k-128-r3` | jetstream r=3 file | — | 17,388 | 2.12 | — | — |
|
||||||
|
| `js-2p2s-20k-128-r3` | jetstream r=3 file | 19,876 | 9,959 | 1.22 | 9,942 | 1.21 |
|
||||||
|
| `js-4p-20k-1k-r3` | jetstream r=3 file | — | 18,114 | 17.69 | — | — |
|
||||||
|
| `js-4p-50k-128-r3` | jetstream r=3 file | — | 22,853 | 2.79 | — | — |
|
||||||
|
| `js-mem-1p-20k-128-r3` | jetstream r=3 file | — | 22,153 | 2.70 | — | — |
|
||||||
|
| `js-mem-4p-20k-1k-r3` | jetstream r=3 file | — | 28,685 | 28.01 | — | — |
|
||||||
|
| `js-mem-4p-50k-128-r3` | jetstream r=3 file | — | 36,355 | 4.44 | — | — |
|
||||||
|
|
||||||
|
### Round-trip delay
|
||||||
|
|
||||||
|
| Run | Kind | Count | Pubs | Size | min | avg | p50 | p90 | p99 | max |
|
||||||
|
|-----|------|-------|------|------|-----|-----|-----|-----|-----|-----|
|
||||||
|
| `lat-ping-1k-128` | ping (sequential RTT) | 1000 | 1 | 128 B | 0.250ms | 0.319ms | 0.299ms | 0.363ms | 0.684ms | 2.759ms |
|
||||||
|
| `lat-1p-5k-128` | flood (burst queueing) | 5000 | 1 | 128 B | 94.920ms | 132.026ms | 131.990ms | 156.086ms | 158.860ms | 158.965ms |
|
||||||
|
| `lat-4p-5k-1k` | flood (burst queueing) | 5000 | 4 | 1024 B | 113.281ms | 132.425ms | 131.457ms | 140.317ms | 144.683ms | 145.365ms |
|
||||||
|
| `lat-4p-10k-128` | flood (burst queueing) | 10000 | 4 | 128 B | 153.318ms | 204.329ms | 205.865ms | 234.151ms | 237.346ms | 237.477ms |
|
||||||
|
| `lat-8p-20k-128` | flood (burst queueing) | 20000 | 8 | 128 B | 233.727ms | 310.924ms | 311.170ms | 373.437ms | 400.764ms | 402.811ms |
|
||||||
|
|
||||||
|
### Core NATS
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*Core NATS throughput at four loads (NS1 host run)*
|
||||||
|
### Payload size (core)
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*Core NATS 128 B vs 1 KiB (NS1 host run)*
|
||||||
|
### JetStream r=3 file
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*JetStream durable publish rate (NS1 host run)*
|
||||||
|
### Core vs JetStream
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*Core vs JetStream publish rate, log scale (NS1 host run)*
|
||||||
|
### Delay
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
*Ping vs flood delay percentiles, log scale (NS1 host run)*
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 4. Study methodology
|
||||||
|
|
||||||
|
### 4.1 Question
|
||||||
|
|
||||||
|
On the NS1 test stand, what message **throughput** and **delay** does the three-node `verae` JetStream cluster deliver at several loads, and which part of the stack is the limiter for product traffic (jobs, events, webhooks, archive)?
|
||||||
|
|
||||||
|
### 4.2 Hypotheses (stated before the run)
|
||||||
|
|
||||||
|
1. **H1 — Core vs JetStream.** Fire-and-forget core NATS is at least an order of magnitude faster than JetStream **file + replicas=3**, because durable publish waits for a majority disk replica.
|
||||||
|
2. **H2 — JetStream parallelism.** Adding publishers does **not** linearly increase JetStream write rate once the replica log is saturated.
|
||||||
|
3. **H3 — Quiet delay.** Sequential pub→sub round trip on `vmbr1` is well under 1 ms p99 when the consumer is waiting.
|
||||||
|
4. **H4 — Burst delay.** If publishers dump a batch before the subscriber drains, observed delay is **queueing time**, roughly linear in backlog, not in cluster hop count.
|
||||||
|
5. **H5 — Payload.** Moving 128 B → 1 KiB lowers message rate and raises byte rate on core NATS; JetStream in this size band stays replica/fsync bound.
|
||||||
|
|
||||||
|
### 4.3 Independent variables (what we changed)
|
||||||
|
|
||||||
|
| Factor | Levels |
|
||||||
|
|--------|--------|
|
||||||
|
| Transport | Core NATS pub/sub vs JetStream file replicas=3 |
|
||||||
|
| Publisher count | 1, 2, 4, 8 |
|
||||||
|
| Subscriber count | 0 (JS publish-only), 1, 2, 4, 8 |
|
||||||
|
| Message count | 1k, 5k, 10k, 20k, 50k, 100k, 200k (by ladder step) |
|
||||||
|
| Payload | 128 B, 1024 B |
|
||||||
|
| Delay mode | **ping** (publish, wait, repeat) vs **flood** (publish all, then drain) |
|
||||||
|
|
||||||
|
### 4.4 Dependent variables (what we recorded)
|
||||||
|
|
||||||
|
| Metric | Instrument | Unit |
|
||||||
|
|--------|------------|------|
|
||||||
|
| Publish rate | `nats bench` 0.1.6 Pub stats | msgs/s, MB/s |
|
||||||
|
| Subscribe rate | `nats bench` Sub stats | msgs/s, MB/s |
|
||||||
|
| Aggregate | `nats bench` NATS Pub/Sub stats | msgs/s (fan-out counts both sides) |
|
||||||
|
| Publisher spread | nats min/avg/max **msgs/s** | not delay |
|
||||||
|
| One-way-ish RTT | `latency.mjs` header timestamp | min, avg, p50, p90, p99, max |
|
||||||
|
| Host load | `/proc/loadavg` before and after | load average |
|
||||||
|
| Broker counters | `http://127.0.0.1:8222/varz` inside each nats LXC | connections, in/out msgs, cpu, mem |
|
||||||
|
|
||||||
|
**Important:** nats CLI 0.1.6 min/avg/max are **rate spread across publishers**, not microseconds of delay. Delay is only `latency.mjs`.
|
||||||
|
|
||||||
|
### 4.5 Controls and constants
|
||||||
|
|
||||||
|
- Cluster name `verae`, three routes, client `:4222`, cluster `:6222`, monitor loopback `:8222`.
|
||||||
|
- Client URL always the three-node list on `vmbr1` (never host `127.0.0.1:4222`, never `vmbr0`).
|
||||||
|
- Bench client is LXC **510**, not a nats-* server.
|
||||||
|
- JetStream bench stream name `benchstream`, **file** storage, **replicas=3**, deleted between JS loads (`nats stream rm --force`) so names do not collide.
|
||||||
|
- Product streams were **not** the bench target (no load test on `ZAPIER_*` / `VERAE_ARCHIVE`).
|
||||||
|
- No TLS, no nkeys, no account isolation (isolation is `vmbr1`).
|
||||||
|
- Same nats CLI version (0.1.6) and `nats@2` Node client as the first ladder.
|
||||||
|
|
||||||
|
### 4.6 Procedure
|
||||||
|
|
||||||
|
1. Confirm this script is executing on **NS1.GEORGELAMBERT.ORG**. Refuse otherwise.
|
||||||
|
2. Snapshot host load, memory, LXC configs, and each nats `varz`.
|
||||||
|
3. From NS1, `pct exec 510` the core ladder (1p1s, 4p4s, 8p8s at 128 B; 4p4s at 1 KiB).
|
||||||
|
4. Delete `benchstream`; JS ladder (1p, 4p, 4p×1 KiB, 2p2s pull) at replicas=3 file.
|
||||||
|
5. Copy `latency.mjs` into 510; ping then flood at several batch sizes.
|
||||||
|
6. Snapshot host/`varz` again.
|
||||||
|
7. Parse logs on **this host**; draw charts; write HTML and PDF on **this host**.
|
||||||
|
|
||||||
|
No publish, subscribe, chart, or PDF process runs on the operator laptop for this study.
|
||||||
|
|
||||||
|
### 4.7 Instrumentation path
|
||||||
|
|
||||||
|
```text
|
||||||
|
[NS1 host 70.88.205.138]
|
||||||
|
study-on-ns1.sh (bash + python3)
|
||||||
|
|
|
||||||
|
| sudo pct exec 510
|
||||||
|
v
|
||||||
|
[LXC 510 verae-px-worker 10.10.10.20]
|
||||||
|
nats bench / node latency.mjs
|
||||||
|
|
|
||||||
|
| NATS client protocol to
|
||||||
|
v
|
||||||
|
[LXC 511/512/513 10.10.10.21-23 :4222]
|
||||||
|
nats-server -js cluster routes :6222
|
||||||
|
```
|
||||||
|
|
||||||
|
The hypervisor issues the guest commands. The messages themselves never leave `vmbr1`.
|
||||||
|
|
||||||
|
### 4.8 Threats to validity
|
||||||
|
|
||||||
|
| Threat | Effect on numbers |
|
||||||
|
|--------|-------------------|
|
||||||
|
| **One physical host** | Three “replicas” share CPU, memory, and usually the same datastore. This measures process/LXC HA, not disk HA. |
|
||||||
|
| **Shared load** | NS1 also runs Caddy, Forgejo, keep, fleet, portal, and other CTs. Load average during a run is part of the result, not noise to ignore. |
|
||||||
|
| **Single bench client** | All publishers live in 510. Per-publisher rate spread is contention in that guest. |
|
||||||
|
| **Short runs** | Seconds of traffic. No compaction, no multi-hour page-cache eviction, no snapshot during load. |
|
||||||
|
| **No TLS/nkeys** | Production auth will cost CPU. Do not treat these rates as post-nkeys rates. |
|
||||||
|
| **Fan-out aggregate** | Core aggregate msgs/s counts pub+sub. Do not compare that column to JetStream unique writes. |
|
||||||
|
| **Flood ≠ RTT** | Mixing flood averages with ping p99 produces a fake “NATS is slow” story. |
|
||||||
|
| **Lab only** | Not a Zapier HTTPS bench and not live `api.veraetime.net`. |
|
||||||
|
|
||||||
|
### 4.9 Ethics / safety
|
||||||
|
|
||||||
|
Bench uses throwaway subjects (`bench.core.*`, `bench.js.*`, `bench.lat.*`) and a throwaway stream. It does not purge product streams. Zapier cloud has no NATS socket.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 5. Suggestions for fine-tuning
|
||||||
|
|
||||||
|
These follow from the method and from the first ladder on this stand (JetStream ~16k durable 128 B pubs/s; ping ~0.3 ms; flood hundreds of ms). Apply in order of leverage. Re-run **this NS1 study** after each change so the delta is measured the same way.
|
||||||
|
|
||||||
|
### 5.1 Treat JetStream as the product limiter
|
||||||
|
|
||||||
|
Product jobs/events/webhooks/archive are durable. Tuning core NATS to 2M msgs/s will not move a timestamp Zap. Put effort into **replica write path** and **consumer lag**, not core fan-out.
|
||||||
|
|
||||||
|
### 5.2 Split storage class by stream
|
||||||
|
|
||||||
|
| Stream | Suggested store | Why |
|
||||||
|
|--------|-----------------|-----|
|
||||||
|
| `ZAPIER_JOBS` | file, r=3 | Work queue; lose-a-job is bad |
|
||||||
|
| `ZAPIER_EVENTS` | file r=3, or memory r=3 if events are rebuildable from job status | Hot waiters; measure both |
|
||||||
|
| `ZAPIER_WEBHOOKS` | file, r=3, workqueue | HTTPS to Zapier is the slow consumer |
|
||||||
|
| `ZAPIER_USAGE` | file, r=3, limits + max-age | Telemetry |
|
||||||
|
| `VERAE_ARCHIVE` | file, r=3, on the **best disk** | Puts are larger and must survive |
|
||||||
|
|
||||||
|
Try `ZAPIER_EVENTS` as memory store in a maintenance window and re-run only the JS + ping/flood steps. If ping stays ~0.3 ms and durable events still ack at a higher rate, keep it; if a CT restart drops in-flight waiters, revert.
|
||||||
|
|
||||||
|
### 5.3 Give JetStream real disks
|
||||||
|
|
||||||
|
Today r=3 on three LXC guests on **one Proxmox host** is three files, one failure domain.
|
||||||
|
|
||||||
|
- Bind-mount a distinct SSD/NVMe (or ZFS dataset with its own vdev) into each nats LXC `store_dir`.
|
||||||
|
- Set `sync: always` only on archive if you need it; default sync is often enough for jobs and is faster. Measure.
|
||||||
|
- Do not put JetStream `store_dir` on the same busy rootfs as Forgejo/Caddy if we can avoid it.
|
||||||
|
- When moving to three metal boxes: same configs, private NIC, one disk (or mirror) **per node**. That is the first change that makes r=3 mean “two boxes can die.”
|
||||||
|
|
||||||
|
### 5.4 Isolate the nats CTs from the rest of NS1
|
||||||
|
|
||||||
|
Host load on this box is often already several. Pin:
|
||||||
|
|
||||||
|
- `nats-a/b/c`: dedicated cores, no steal from keep/fleet Node processes.
|
||||||
|
- Memory high enough that file-backed streams stay cache-hot for the working set.
|
||||||
|
- `cpuunits` / cpuset in `pct config` so a Zapier-facing Node GC pause does not stall fsync.
|
||||||
|
|
||||||
|
Re-run this study after pinning; H1/H2 should move more than ping.
|
||||||
|
|
||||||
|
### 5.5 Consumer and mailbox tuning (delay H4)
|
||||||
|
|
||||||
|
Flood delay is backlog / consume_rate. Fine-tune the **waiters**, not the broker RTT.
|
||||||
|
|
||||||
|
- `jobs.events` and `webhooks.deliver`: raise `max_ack_pending` so a slow HTTPS hook does not stall the whole consumer; cap it so a poison message cannot unbounded-buffer RAM.
|
||||||
|
- Pull consumers: larger batch, shorter `expires`, more pullers horizontally (fleet replica floors) instead of one fat subscriber.
|
||||||
|
- Middleware should **not** flood-publish then wait; it already does per-job publish. Keep that. The flood test is the outage profile when a consumer is stopped.
|
||||||
|
- Alert on **consumer lag** (pending + ack pending) from JetStream, not on ping RTT.
|
||||||
|
|
||||||
|
### 5.6 Publisher-side batching in middleware
|
||||||
|
|
||||||
|
A timestamp job is one small JSON. 16k msgs/s is ample. Still:
|
||||||
|
|
||||||
|
- Avoid per-byte publishes; one message per job/event.
|
||||||
|
- Reuse NATS connections (connection churn showed up as publisher spread in the core 4p/8p runs).
|
||||||
|
- Idempotent `msg id` / duplicate window sized to Verae retry window, not default-only.
|
||||||
|
|
||||||
|
### 5.7 nats-server knobs worth measuring (A/B with this script)
|
||||||
|
|
||||||
|
| Knob | Why try it |
|
||||||
|
|------|------------|
|
||||||
|
| `max_payload` | Keep default unless archive puts grow |
|
||||||
|
| `write_deadline` | Slow consumer protection for webhooks |
|
||||||
|
| `max_pending` | Bound memory on a stuck Zapier hook |
|
||||||
|
| `max_connections` | Fleet workers + keep + middleware |
|
||||||
|
| JetStream `max_file_store` / `max_memory_store` | Prevent one stream from filling the CT |
|
||||||
|
| `max_outstanding_catchup` | Replica restart after a nats-c blip |
|
||||||
|
| GOMAXPROCS = LXC cores | Do not overthread a 2-core CT |
|
||||||
|
|
||||||
|
Change **one** knob, re-run `study-on-ns1.sh`, compare JetStream 1p 128 B and ping p99.
|
||||||
|
|
||||||
|
### 5.8 Network
|
||||||
|
|
||||||
|
- Keep NATS off `vmbr0`. No change.
|
||||||
|
- When on metal: dedicated NIC or VLAN for cluster `:6222` vs client `:4222` if possible (replication vs client load).
|
||||||
|
- Check virtio queue counts on the LXC nics if core 1 KiB byte rate plateaus.
|
||||||
|
|
||||||
|
### 5.9 Security cost (when nkeys/mTLS flip)
|
||||||
|
|
||||||
|
`verae-nats-accounts` is still a sketch. Enabling accounts will add CPU on publish. Budget: re-run this exact study **after** creds are in every `NATS_URL`, and accept a drop on both core and JS. Do not flip without that measurement.
|
||||||
|
|
||||||
|
### 5.10 Operational fine-tuning (lag, not peak msgs/s)
|
||||||
|
|
||||||
|
1. Scrape `varz` / `jsz` from the host over `vmbr1` (not public). Monitor loopback `:8222` is invisible to Prometheus on NS1 unless we add a host-side proxy on `10.10.10.21:8222` bound only to `vmbr1`.
|
||||||
|
2. Keep replica floors for webhook-deliver and job-poller — they are the flood defense.
|
||||||
|
3. Backup/restore drill of JetStream **during idle**, then a short JS 1p run to see catchup cost.
|
||||||
|
4. A 15–30 minute soak (not in this ladder) for page cache and compaction; add that as a third study when disks are dedicated.
|
||||||
|
|
||||||
|
### 5.11 What not to tune
|
||||||
|
|
||||||
|
- Do not chase core 8p8s aggregate. It is fan-out on a lab bridge.
|
||||||
|
- Do not treat flood 400 ms as “cluster RTT.” Fix consumers.
|
||||||
|
- Do not load-test on `ZAPIER_*` streams.
|
||||||
|
- Do not bind client NATS to `0.0.0.0` on `vmbr0`.
|
||||||
|
|
||||||
|
### 5.12 Recommended next experiments (same method, one change each)
|
||||||
|
|
||||||
|
1. CPU pin nats-a/b/c → re-run JS 1p + ping.
|
||||||
|
2. `ZAPIER_EVENTS`-shaped memory stream vs file (throwaway stream, same flags as this JS ladder).
|
||||||
|
3. Distinct `store_dir` disks per node.
|
||||||
|
4. nkeys on, same ladder.
|
||||||
|
5. Three hardware boxes, same `cluster.env` IPs updated.
|
||||||
|
|
||||||
|
Each experiment should produce a new `results/<utc>/` on NS1 and a new progress-repo report so we can diff H1–H5 instead of arguing from memory.
|
||||||
|
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## 6. Reproducing this study
|
||||||
|
|
||||||
|
On **NS1 only**:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
cd ~/verae-src/verae-nats-cluster
|
||||||
|
bash scripts/study-on-ns1.sh
|
||||||
|
```
|
||||||
|
|
||||||
|
The script exits if `hostname` is not NS1. Outputs land in `results/<utc>/` including `nats-cluster-bench-ns1.{md,html,pdf}` and `charts/`. Copy those into `zapier-decisions/reports/` for the progress repo and catalog.
|
||||||
|
|
||||||
|
Raw logs for this run: `results/20260912T053120Z/`.
|
||||||
Binary file not shown.
|
|
@ -866,6 +866,10 @@ def main() -> None:
|
||||||
"packages/zapier-decisions/reports/ns1-host/nats-cluster-bench-ns1.pdf",
|
"packages/zapier-decisions/reports/ns1-host/nats-cluster-bench-ns1.pdf",
|
||||||
"NATS cluster study run entirely on NS1 (methodology + tuning)",
|
"NATS cluster study run entirely on NS1 (methodology + tuning)",
|
||||||
),
|
),
|
||||||
|
(
|
||||||
|
"packages/zapier-decisions/reports/ns1-maximize/nats-cluster-bench-ns1.pdf",
|
||||||
|
"Maximized NS1 study: 8 cores, 16 GiB, tmpfs JetStream (delta)",
|
||||||
|
),
|
||||||
("packages/verae-nats-cluster/BENCH.pdf", "NATS cluster throughput tables (2026-09-12)"),
|
("packages/verae-nats-cluster/BENCH.pdf", "NATS cluster throughput tables (2026-09-12)"),
|
||||||
("overview/README.pdf", "System overview"),
|
("overview/README.pdf", "System overview"),
|
||||||
("overview/INDEX.pdf", "Documentation index"),
|
("overview/INDEX.pdf", "Documentation index"),
|
||||||
|
|
@ -887,6 +891,10 @@ def main() -> None:
|
||||||
"packages/zapier-decisions/reports/ns1-host/nats-cluster-bench-ns1.html",
|
"packages/zapier-decisions/reports/ns1-host/nats-cluster-bench-ns1.html",
|
||||||
"NATS cluster study run entirely on NS1",
|
"NATS cluster study run entirely on NS1",
|
||||||
),
|
),
|
||||||
|
(
|
||||||
|
"packages/zapier-decisions/reports/ns1-maximize/nats-cluster-bench-ns1.html",
|
||||||
|
"Maximized NS1 study (8c/16G/tmpfs)",
|
||||||
|
),
|
||||||
("packages/verae-nats-cluster/BENCH.html", "NATS cluster throughput tables"),
|
("packages/verae-nats-cluster/BENCH.html", "NATS cluster throughput tables"),
|
||||||
("docs-master/MESSAGE-FLOWS.html", "Numbered message flows"),
|
("docs-master/MESSAGE-FLOWS.html", "Numbered message flows"),
|
||||||
("docs-master/modules-and-nats.html", "NATS address table"),
|
("docs-master/modules-and-nats.html", "NATS address table"),
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue