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koopa-admin-log/benchmarks/amount-ladder/README.md
Hernâni Marques 84388ae6a9
ops: castopod/bonfire notes; amount-ladder bench
2026-07-10 11:33:09 +02:00

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Amount-ladder payment benchmark

Model

Side Machine Role
Drive (external) Local machine (this tree) taler-wallet-cli, orchestration, CSV/RESULTS
SUT (internal) koopa containers merchant / exchange / bank under load
Measure (internal) ssh hernani@koopa loadavg, ps in each container 
[ Local-machine wallet-cli ] --HTTPS--> taler.hacktivism.ch / exchange / bank
       |                              ^
       | ssh sample_load              | pasta :9010/:9011/:9012
       v                              |
[ hernani@koopa ] --podman exec--> process CPU/RSS snapshots

Prerequisites

  1. Stack healthy (check_*-health.sh all green; public /config + exchange /keys 200).
  2. Local wallet CLI (default path in script, override MONO=).
  3. Secrets in ../koopa-admin-secrets/koopa/host-root/:
    • taler-bank/bank-admin-password.txt
    • taler-bank/bank-bench-fat-password.txt (created if missing)
    • taler-merchant/merchant-goa-demo-cp4zqk-password.txt
  4. SSH: hernani@koopa BatchMode, podman without su.

Amount ladder (~20 payments: small / medium / large)

Band Amounts (GOA)
small 0.000001 0.00001 0.0001 0.001 0.01 0.05 0.1 0.5
medium 1 2 5 10 25 50 100
large 250 500 1000 2500 5000

Default list (20 steps):

GOA:0.000001 GOA:0.00001 GOA:0.0001 GOA:0.001 GOA:0.01 GOA:0.05 GOA:0.1 GOA:0.5
GOA:1 GOA:2 GOA:5 GOA:10 GOA:25 GOA:50 GOA:100
GOA:250 GOA:500 GOA:1000 GOA:2500 GOA:5000

Σ ladder ≈ GOA:9433 → default withdraw GOA:50000, admin credit GOA:200000.

Override: AMOUNTS='GOA:1 GOA:10' ./run.sh

Pay-template URI (important)

Do not put a trailing slash after the template id (wallet then 404s).

taler://pay-template/taler.hacktivism.ch/instances/goa-demo-cp4zqk/goa-free?amount=GOA:1
  • Template goa-free is free-amount with fixed summary "pay" → pass only amount= (no summary= or merchant 409).
  • HTTP GET probe:
    https://taler.hacktivism.ch/instances/goa-demo-cp4zqk/templates/goa-free → 200.

Run

cd koopa-admin-log/benchmarks/amount-ladder
./run.sh
# short:
AMOUNTS='GOA:0.05 GOA:1 GOA:10' WITHDRAW_AMT=GOA:100 ./run.sh

Outputs under ../../.tmp/amount-bench-<UTC>/:

File Content
payments.csv per-amount timings + status
RESULTS.md table summary
koopa-load-*.out inside process samples
run.log timeline

Columns (RESULTS)

  • handle: wall time of wallet handle-uri
  • run-until-done: wallet background after handle
  • total: sum
  • loadavg: koopa 1‑min load after payment
  • status: paid / error / insufficient / …

Related

  • Partial earlier run (wrong URI): 2026/2026-07-09--amount-ladder-partial-results.md
  • Instance notes: configs/taler-merchant/demo-instance-goa-demo-cp4zqk.md