Define a compatible pair
Synthetic app recovery needs DB and media-index snapshots with the same generation ID. Available DB G8 at 11:00, DB G9 at 12:00 and media-index G8 at 11:00. No G9 index or conversion is supplied. These IDs define compatibility only for this exercise.
| Component | Generation | Snapshot time |
|---|---|---|
| DB | G8 | 11:00 |
| DB | G9 | 12:00 |
| Media index | G8 | 11:00 |
Match generation identifiers
- Group files by generation
- Require every component in a group
- Select an eligible complete group
File presence alone cannot replace the supplied compatibility rule.
Which pair is supported?
Show the worked answer
DB G8 with media-index G8. DB G9 is newer but has no matching index; the complete candidate remains 11:00.
Keep freshness separate from compatibility
| Case | Decision | Reason |
|---|---|---|
| DB G8 +index G8 | Eligible | Same generation |
| DB G9 +index G8 | Reject | Generation mismatch |
Keep the chosen pair together in the recovery worksheet. Restoring either file on its own has not demonstrated a usable combined result.