225751d34d
m11p1 — decoupled ack/ship path: staged writes (seqno+WAL+relay-push, microseconds) separate from group-commit fsync; ShipQueue batches+windows outbound segments; receiver coalesces inbound chunks before applying. Adds first tidaldb_cluster_* metrics. m11p2 — leader WAL is now THE replicated log: fsynced batches feed a bounded WalShipFeed and ship byte-identical to followers; WAL seqnos survive restarts (relay-reset hazard gone). Item metadata and embeddings journal kind-1/2 blob records on the same stream as signals; the m8p10 HTTP broadcast is deleted. StreamSegments catch-up is follower-pulled via server-streaming RPC, triggered on gap detection, follower boot, and leader heal nudge. Promote carries a stream baseline so peers skip pre-stream history. |
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| .. | ||
| guides | ||
| ops | ||
| planning | ||
| profiling | ||
| research | ||
| reviews | ||
| runbooks | ||
| specs | ||
| content-strategy.md | ||
| personal-briefing-beachhead.md | ||
| README.md | ||
| roadmap-to-cluster.md | ||
tidalDB Engineering Docs
The engineering documentation home. Top-level product docs (VISION, USE_CASES, SEQUENCE, ARCHITECTURE, API, QUICKSTART, CODING_GUIDELINES, thoughts) live at the repository root; everything below is the deeper engineering record.
This and the repo root are the two canonical doc homes. There is intentionally no per-crate doc mirror (no
tidal/docs/). Edit the canonical file, never a copy.
Component specs — specs/
The authoritative component specifications (status: Implemented, M0–M8).
| # | Spec | # | Spec |
|---|---|---|---|
| 00 | Architecture overview | 08 | Query engine |
| 01 | Storage engine | 09 | Ranking & scoring |
| 02 | Entity model | 10 | Feedback loop |
| 03 | Signal system | 11 | Schema |
| 04 | Relationships | 12 | Cold start |
| 05 | Cohorts | 13 | Concurrency |
| 06 | Text retrieval | 14 | Scale architecture |
| 07 | Vector retrieval |
Planning — planning/
- ROADMAP.md — milestones M0–M10, phase status, known gaps
- roadmap-to-cluster.md — gap analysis + phase plan (M11 candidate) from the experimental multi-process cluster to an enterprise-grade one, grounded in the 2026-06-10 live stress-test baselines
- PRODUCT_ROADMAP.md · architecture-review.md · roadmap-cohort-analysis.md · site-cohort-analysis.md
- Per-milestone phase/task archive:
planning/milestone-0,1,2,3,5,7,8,9,10,p/
Code reviews — reviews/
- M0–M10 code review — 2026-06-07 — seven-dimension re-review, 88 verified findings
- M0–M10 code review — 2026-06-08 — seven-dimension review, 142 findings (latest pass)
- M0–M10 seven-dimension review — additional pass (2 BLOCKERs: signal-checkpoint trim, 30-day window)
Guides — guides/
Task-oriented, build-an-app docs (complements the root QUICKSTART.md and API.md):
- Build a feed app — end-to-end TikTok/Reels-style "For You" feed, embedded and over HTTP
- Embedding integration — wiring a real embedding model (OpenAI / Cohere / local) into the write + query paths
- Server deployment — running the
tidal-serverHTTP service: config, auth, the served OpenAPI spec, Docker - Ranking-profile reference: ai-lookup/services/ranking-profiles.md — all 25 built-in profiles
Operations — ops/ and runbooks/
- Monitoring · Prometheus alerts · Grafana dashboard · Capacity planning · Recovery
- Runbooks: Kubernetes · Cluster (experimental)
Research — research/
ANN (1, 2) · Tantivy (1, 2) · Signal ledger (1, 2) · WAL · Type system · Tooling & diagnostics · Enterprise-readiness risks
Profiling — profiling/
Hotspot analysis · Scale baselines · Signal memory · Signal rollup eval · Social scale · Tantivy merge tuning · USearch tuning