David Snelling
3236a01bef
A4 of the service-class pair (SELF-ENGINE-LIFECYCLE-SPRINT, David-directed: 'why do we need manual flushes at all?'). The production disease: 829 caller-scheduled per-write flushes convoying into 45-66s write walls — cadence hand-rolled a layer above the only layer that can see dirty-node counts and IO pressure. - BrainyConfig.persistence: policy 'auto' (DEFAULT) | 'manual', with flushEveryWrites (512) / flushIntervalMs (30s) / flushOnIdleMs (2s) triggers. Auto = the engine kicks ONE single-flight BACKGROUND flush at a threshold or when the store goes quiet; write acks NEVER await it (a hung flush cannot block a write — pinned); a failed background flush is LOUD and re-arms the trigger. 'manual' restores caller-owned cadence. - Triggers wired at both write chokepoints (single-op post-commit + transact post-commit); idle timer unref'd; close() tears the timer down and drains the flight before its own final flush. - RECOVERY SEMANTICS documented on the config: canonical records are durable per-write regardless of policy — a crash between background flushes loses derived state only, which converges at next open (epoch machinery + the new incremental aggregation catch-up), bounded by the un-flushed window. Never data loss. Pins: write-count trigger fires one background flush with zero caller calls · idle trigger · manual never self-flushes · THE ACK LAW (writes acknowledge under a never-resolving flush). Gates: unit 1917/1917 · integration 760 · conformance 27/27 — green WITH auto as the default. |
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| .. | ||
| aggregation | ||
| brainy | ||
| db | ||
| graph | ||
| hnsw | ||
| import | ||
| indexes/columnStore | ||
| neural | ||
| performance | ||
| storage | ||
| transaction | ||
| types | ||
| universal | ||
| utils | ||
| vfs | ||
| boundary-no-native.test.ts | ||
| brainy-core.unit.test.ts | ||
| brainy-get-optimization.test.ts | ||
| cold-open-rebuild-gate.test.ts | ||
| create-entities-default.test.ts | ||
| fieldTypeInference.test.ts | ||
| get-index-status-readiness.test.ts | ||
| metadata-cold-read-guard.test.ts | ||
| migration-lock.test.ts | ||
| plugin-autodetect.test.ts | ||
| plugin-version-coupling.test.ts | ||
| plugin.test.ts | ||
| process-exit-sweep.test.ts | ||
| shutdown-hooks-lifecycle.test.ts | ||
| test-suite-coverage-guard.test.ts | ||
| type-filtering.unit.test.ts | ||
| validate-invariants-delegation.test.ts | ||
| vector-cold-read-guard.test.ts | ||
| vfs-multi-instance-diagnostic.test.ts | ||
| vfs-restart-fix.test.ts | ||
| where-operator-validation.test.ts | ||