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OD-1: projection engine — SQLite or RocksDB inside the Mnestic generation #34

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opened 2026-09-02 07:55:44 +00:00 by larandar · 2 comments
larandar commented 2026-09-02 07:55:44 +00:00
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Question

Which storage engine lives inside .hydramem/projections/mnestic/<generation>/?

Where this already lives

docs/handoff.md §Open decisions 1 ("Benchmark peak RSS, rebuild time, reader concurrency, and artifact size before ruling"); ADR-0001 §Open decisions (projection engine storage).

Decision procedure

Rule on the result table posted by probe #5. Ruling lands as a new ADR append citing the corpus revision.

Unblocks

#3's engine module; #28 production wiring.

## Question Which storage engine lives inside `.hydramem/projections/mnestic/<generation>/`? ## Where this already lives `docs/handoff.md` §Open decisions 1 ("Benchmark peak RSS, rebuild time, reader concurrency, and artifact size before ruling"); ADR-0001 §Open decisions (projection engine storage). ## Decision procedure Rule on the result table posted by probe #5. Ruling lands as a new ADR append citing the corpus revision. ## Unblocks #3's engine module; #28 production wiring.
larandar commented 2026-09-02 08:00:32 +00:00
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Grooming state: Open — owner ruling required.
Evidence: Probe #5 declares the result format (engine × RSS / rebuild / concurrency / artifact size over the fixture corpus). Related mentions: docs/handoff.md §Open decisions 1; ADR-0001 §Open decisions (projection engine storage). No other tracker records exist ahead of this port.
Larandar: Decision required.

<!-- larandar:groom:v1 --> **Grooming state:** Open — owner ruling required. **Evidence:** Probe #5 declares the result format (engine × RSS / rebuild / concurrency / artifact size over the fixture corpus). Related mentions: `docs/handoff.md` §Open decisions 1; ADR-0001 §Open decisions (projection engine storage). No other tracker records exist ahead of this port. **Larandar:** Decision required.
larandar commented 2026-09-02 08:47:03 +00:00
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Question: Which storage engine lives inside the Mnestic generation: SQLite or RocksDB?
Decision procedure: Evaluate probe #5 on peak RSS, rebuild time, reader concurrency, and artifact size over the fixture corpus; record the ruling in an ADR append with the corpus revision.
Consumers: #3 engine module and Session #28 production wiring.
Sources: CurryComb#34 body; docs/handoff.md Open decisions 1; ADR-0001 Open decisions; audit 2026-09-19/20 G43.
State: The issue body remains the full record; this comment is the current projection, not a promise of future replacement.

<!-- currycomb:refinement:v1 repo=Ting/CurryComb issue=34 --> **Question:** Which storage engine lives inside the Mnestic generation: SQLite or RocksDB? **Decision procedure:** Evaluate probe #5 on peak RSS, rebuild time, reader concurrency, and artifact size over the fixture corpus; record the ruling in an ADR append with the corpus revision. **Consumers:** #3 engine module and Session #28 production wiring. **Sources:** CurryComb#34 body; docs/handoff.md Open decisions 1; ADR-0001 Open decisions; audit 2026-09-19/20 G43. **State:** The issue body remains the full record; this comment is the current projection, not a promise of future replacement.
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Blocks
#28 Slice 2 — persistent facts in HydraMem
Ting/CurryComb
#41 Rule: the seven open design decisions
Ting/CurryComb
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#5 Probe: projection-engine benchmark (RSS, rebuild, concurrency, artifact size)
Ting/CurryComb
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Ting/CurryComb#34
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