EXP-003PLANNED

Cross-Border Failure Simulation

Understand how a split-cloud financial workload behaves when connectivity between foreign compute and Nigerian infrastructure is degraded or unavailable.

AUTHOR: Hexcore Engineering Lab
UPDATED: 2026-10-04
EVIDENCE STATE: HYPOTHESISED / PLANNED

01 / Research question

How does a split-cloud transaction system fail, recover and reconcile during degraded or unavailable cross-border connectivity?

Hypothesis — not a finding

Unbounded retries and long connection timeouts will amplify partial network failure into application and queue exhaustion.

02 / Architecture

System topologyBaseline pending

Foreign compute

Transaction services

Clients + workers

Fault boundary

Network impairment

Delay · loss · outage

Nigerian infrastructure

Data services

Database + queue

Conceptual architecture · final environment to be documented

03 / Environment

Baseline topology: Derived from EXP-002
Fault injection: Controlled latency, packet loss and disconnection
Safety: Isolated test environment; synthetic data
Recovery: Runbook and reconciliation criteria to be defined

04 / Methodology

The planned reference transaction workload from EXP-002, with bounded arrival rates and traceable synthetic transaction IDs.

01Capture healthy baseline
02Introduce bounded latency
03Introduce packet loss and jitter
04Simulate total link failure
05Observe saturation and recovery
06Verify reconciliation and data integrity

05 / Measurements

M-01

Timeout behaviour

M-02

Retry amplification

M-03

Queue buildup

M-04

Connection exhaustion

M-05

Recovery time

M-06

Reconciliation

M-07

Service availability

06 / Results & observations

Results pending

This experiment has not yet been executed.

This space will contain measured results, observations and failure modes after repeated runs and methodological review. No benchmark values are available yet.

07 / Limitations

—Simulation cannot represent every carrier failure mode
—Dependencies and failover policy are not yet final
—No claims will be made before repeated runs

08 / Reproduction & artefacts

Test harnessPending

Raw measurementsPending

Analysis notebookPending

Commands, configuration, dataset generators and raw data will be linked here when they exist.

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