Capture archive metadata and blob references at one snapshot boundary
A document changes while backup runs and the manifest references an uncopied blob. Define one consistent capture boundary.
- Focused work estimate
- 4h + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Consistency · Transactions
Estimated field mix
- Storage systems50%
- Database engineering30%
- Distributed 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.
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Project context
Fictional archive Alder backs up synthetic document metadata and generated blobs into a dedicated local directory. No real organizational data or cloud accounts are required.
Setup prerequisites
- Create synthetic metadata and generated blob fixtures.
- Provide isolated source backup and restore directories.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Manifest reflects one metadata snapshot
- Required blobs remain pinned during capture
- Concurrent new versions belong to later backups
Implementation constraints
- Specify adapter transaction and pin lifetime.
Verification to include
- Update after snapshot
- Delete reference during capture
Deliverables
- Snapshot protocol and race cases
Rollout and recovery
Pause pruning until capture pins are reliable.
Value of the work
For the engineer: Practice consistent snapshots and recoverable restoration.
For the team: Inspect whether backup success can be substantiated by a usable restore.
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.