Assign edge-journal event identities independently from delivery attempts
Retried uploads mint new event IDs and duplicate accepted readings. Persist identity with the original record.
- Focused work estimate
- 1h 45m + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Idempotency · Identity
Estimated field mix
- Embedded and edge50%
- Distributed systems30%
- Storage systems20%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
Review it, then add it to your workspace.
The board opens an editable draft; nothing is saved until you confirm it. Sign-in and workspace permissions apply, and Demo boards remain ephemeral.
Project context
Fictional edge display gateway stores noncritical synthetic readings while disconnected. Implement a byte-array flash emulator with explicit erase/write behavior and injected power cuts; no physical storage device is required.
Setup prerequisites
- Specify emulator page size write rules and erase behavior.
- Generate synthetic records and deterministic power-cut schedules.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Retry preserves identity
- New records get distinct identity
- Restart retains stored identity
Implementation constraints
- IDs must not encode raw reading values.
Verification to include
- Retry same record
- Restart and compare identities
Deliverables
- Event identity contract and cases
Rollout and recovery
Pause replay if stored identity cannot be recovered.
Value of the work
For the engineer: Practice torn writes, wear-aware batching and acknowledged durability.
For the team: Inspect whether offline device records remain recoverable within stated constraints.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.