c522acec8b
J said "let's go" → "next" (option 3): actual flip via Bun mcp-server. Done. Real Bun-frontend traffic now reaches the Go substrate via /_go/* on Bun :3700, routed to the persistent Go gateway at :4110. Companion change in /home/profit/lakehouse (Rust legacy): mcp-server/index.ts: new /_go/* pass-through, opt-in via GO_LAKEHOUSE_URL env var. Off-by-default (returns 503 on /_go/* with rationale). Existing /api/* (Rust gateway) path unchanged. Committed locally on the demo/post-pr11 branch. System config: /etc/systemd/system/lakehouse-agent.service.d/go-cutover.conf adds Environment=GO_LAKEHOUSE_URL=http://127.0.0.1:4110 to the systemd-managed Bun service. Reversible via systemctl revert lakehouse-agent. Live verification (operator curl through Bun frontend): - /_go/health: gateway responds {"status":"ok","service":"gateway"} - /_go/v1/embed: nomic-embed-text-v2-moe vectors, dim=768 - /_go/v1/matrix/search vs persistent 200-worker corpus: rank=0 id=w-43 Brian Ramirez (Forklift Operator, Springfield IL) rank=1 id=w-102 Laura Long (Forklift Operator, Cleveland OH) rank=2 id=w-101 Terrence Gray (Forklift Operator, Champaign IL) 3/3 role match, top-1 in IL exactly - /api/health: lakehouse ok (Rust path unchanged — control verified) What this is NOT: - Not an nginx flip — devop.live/lakehouse/* still goes through /api/* → Rust :3100. /_go/* is parallel slice for opt-in. - Not a tool-level cutover — each /_go/<path> is a manual choice; no automatic mapping of Rust paths to Go equivalents. - Not a transformation layer — caller sends Go-shaped requests (e.g. /_go/v1/embed expects {texts, model}, not {text}). Three cutover unit properties verified: - ADDITIVE: zero modification to any existing Bun tool - REVERSIBLE: unset GO_LAKEHOUSE_URL → /_go/* → 503 - ISOLATED: Rust gateway state unaffected (different port, different binary, different MinIO bucket) This is the cutover slice operators can use to validate Go-side handlers under realistic frontend conditions before any production-traffic flip. Next step (deferred): pick a specific mcp-server tool to optionally route through Go with response- shape adapter — that's a product-visible flip rather than this infrastructure-visible slice. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
5.7 KiB
5.7 KiB
G5 cutover prep — verified-parity log
What works on Go gateway, what's been side-by-side compared to Rust, what's safe to flip. Append a row when a new endpoint clears parity.
| Endpoint | Date | Rust path | Go path | Verdict | Notes |
|---|---|---|---|---|---|
embed (forced v1) |
2026-04-30 | /ai/embed |
/v1/embed |
✅ PASS 5/5 cos=1.000 | bit-identical with model=nomic-embed-text forced both sides |
embed (forced v2-moe) |
2026-04-30 | /ai/embed |
/v1/embed |
✅ PASS 5/5 cos=1.000 | bit-identical with model=nomic-embed-text-v2-moe forced both sides — both Ollamas have the model |
audit_baselines.jsonl |
2026-05-01 | data/_kb/audit_baselines.jsonl |
internal/distillation LoadLastBaseline / AppendBaseline / BuildAuditDriftTable |
✅ PASS round-trip | Live Rust file (7 entries) parses + round-trips byte-equal; lineage drift table fires correctly on zero-baseline metrics. See audit_baselines_roundtrip.md. |
audit-FULL (phases 0/3/4) |
2026-05-01 | scripts/distillation/audit_full.ts |
cmd/audit_full + internal/distillation RunAuditFull |
✅ PASS metric-equal | Go-side run against live Rust root: all 8 ported metrics (p3_, p4_) byte-equal to the last Rust-emitted audit_baselines.jsonl entry. 6/6 required checks pass. 4 phases (1, 2, 5, 6, 7) deferred — depend on broader Rust-side pieces (materializer / replay / run-summaries) not yet ported. See audit_full_go_vs_rust.md. |
audit-FULL (phases 0/1/2/3/4/5/7 — observer mode) |
2026-05-01 | scripts/distillation/audit_full.ts |
cmd/audit_full + internal/distillation RunAuditFull |
✅ PASS 12/12 | Skips reduced from 4 → 1: phase 1 invokes go test, phases 2/5/7 read existing artifacts as observers (no live materializer/replay invocation). Only phase 6 (TS-only acceptance harness) remains skipped. p2_evidence_rows=1055 matches Rust summary.json collect.records_out=1055 byte-equal. Updated audit_full_go_vs_rust.md. |
audit_baselines.jsonl write side |
2026-05-01 | data/_kb/audit_baselines.jsonl (Rust-emitted, 7 entries) |
Go-emitted entry #8 via cmd/audit_full -append-baseline |
✅ Mixed-runtime log | First Go-side entry written to the shared longitudinal log: git_commit=ee2a40c5... (golangLAKEHOUSE SHA, distinguishable from prior Rust SHAs like ca7375ea). All 10 metric fields match Rust shape exactly — drift comparator fires correctly across the runtime boundary. |
| Full Go stack (persistent) | 2026-05-01 | per-binary on :31xx | 11 daemons (storaged/catalogd/ingestd/queryd/embedd/vectord/pathwayd/observerd/matrixd/gateway/chatd) | ✅ All 11 healthy | First time the Go stack runs as long-running daemons rather than per-harness transient processes. Brought up via scripts/cutover/start_go_stack.sh; gateway proxies /v1/embed correctly through to embedd; all 5 chatd providers loaded. Live alongside the Rust gateway on :3100 (no port conflict). |
| G5 cutover slice live | 2026-05-01 | (none — pure cutover) | Bun /_go/* → Go gateway :4110 |
✅ End-to-end | First real Bun-frontend traffic to Go substrate. Rust legacy mcp-server/index.ts gains opt-in /_go/* pass-through driven by GO_LAKEHOUSE_URL env (systemd drop-in at /etc/systemd/system/lakehouse-agent.service.d/go-cutover.conf). /_go/v1/embed returns nomic-embed-text-v2-moe vectors; /_go/v1/matrix/search returns 3/3 Forklift Operators against persistent stack's 200-worker corpus. Reversible (unset env or revert systemd unit). See g5_first_slice_live.md. |
Wire-format drift catalog
The Go gateway is not a literal nginx-swap drop-in for the Rust gateway. Anything that flips needs a wire-shape adapter. Catalog the drift here as it's discovered, so the eventual flip script knows exactly what to remap.
embed
| Field | Rust | Go |
|---|---|---|
| URL prefix | /ai/embed |
/v1/embed |
| Response: vectors field | embeddings |
vectors |
| Response: dim field | dimensions |
dimension |
| Response: model field | model |
model ✓ same |
| Request shape | {texts, model?} |
{texts, model?} ✓ same |
| L2 normalization | unit vectors (‖v‖ ≈ 1.0) | raw Ollama output (‖v‖ ≈ 20-23) |
The L2 normalization difference is real but currently harmless: vectors
point in identical directions (cos=1.000) but Go has raw magnitudes. Verified
2026-04-30 that Go vectord defaults to DistanceCosine (see
internal/vectord/index.go); cosine is magnitude-invariant, so retrieval
rankings are unaffected. The risk only fires if a future caller (a) switches
the index distance to euclidean, (b) compares raw vectors between Go and Rust
directly, or (c) does dot-product expecting unit vectors. Adding a
normalization step in internal/embed/embed.go would make the cutover safer
and is cheap — but not blocking.
Repro
./scripts/cutover/embed_parity.sh # default v1
MODEL=nomic-embed-text-v2-moe ./scripts/cutover/embed_parity.sh # measure embedder
Each run drops a per-date verdict at reports/cutover/embed_parity_<DATE>.md.
What's not yet probed
/v1/sql↔ Rust/query— query shape parity/v1/vectors/search↔ Rust/vectors/search— recall@k parity/v1/matrix/retrieve↔ Rust/vectors/hybrid— semantic retrieve parity (highest-leverage)/v1/storage/*↔ Rust/storage/*— direct S3 abstraction parity/v1/chat— both sides expose this, but providers + token shape differ; Phase 4 already declared chatd parity-tested
The matrix-retrieve probe is the next-highest leverage because it's the actual user-facing retrieval path. Embed parity gives it a clean foundation: vectors come out the same, so any retrieve disagreement is HNSW / corpus / scoring drift, not embedder drift.