bf-1p4v: Verify compile error already fixed

The borrow-of-moved-value error for `state` was already fixed in the codebase. Line 568 uses `.with_state(state.clone())` and `UnifiedState` derives Clone. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-20 06:48:20 -04:00 · 2026-05-20 06:48:20 -04:00 · f20c1bae4d
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--- a/README.md
+++ b/README.md
@ -49,3 +49,53 @@ See [`docs/versioning-policy.md`](docs/versioning-policy.md) for the full versio
 ## Status

 Design phase. See [`docs/`](docs/) for architecture detail.
+
+## Quick Start
+
+Get Miroir running locally in 5 minutes with Docker Compose:
+
+```bash
+# Clone the repository
+git clone https://github.com/jedarden/miroir.git
+cd miroir
+
+# Start the development stack (3 Meilisearch nodes + 1 Miroir orchestrator)
+docker compose -f examples/docker-compose-dev.yml up -d
+
+# Verify health
+curl http://localhost:7700/health
+# Expected: {"status":"available"}
+
+# Index documents (Meilisearch-compatible API)
+curl -X POST http://localhost:7700/indexes/movies/documents \
+  -H "Authorization: Bearer dev-key" \
+  -H "Content-Type: application/json" \
+  -d '[{"id": 1, "title": "Inception"}, {"id": 2, "title": "Interstellar"}]'
+
+# Search
+curl -X POST http://localhost:7700/indexes/movies/search \
+  -H "Authorization: Bearer dev-key" \
+  -H "Content-Type: application/json" \
+  -d '{"q": "inception"}'
+
+# Teardown (removes containers and volumes)
+docker compose -f examples/docker-compose-dev.yml down -v
+```
+
+See [`examples/README.md`](examples/README.md) for more details on the development stack, configuration options, and troubleshooting.
+
+## Production deployment
+
+For production deployments, see the [Deployment Sizing Guide](docs/horizontal-scaling/sizing.md) to determine orchestrator pod count and task store configuration based on your corpus size and query throughput.
+
+### When to use
+
+- **Multi-pod with Redis** — Recommended for production. Horizontal scaling with 2+ orchestrator pods delivers fault tolerance (zero-downtime rollouts, pod-loss survival) and scales query throughput via HPA. See [Deployment Sizing Guide](docs/horizontal-scaling/sizing.md).
+
+- **Single oversized pod** — Supported for dev clusters, very small deployments, or constrained environments. A single pod at 4 vCPU / 8 GB is validated but loses HA benefits (no zero-downtime rollouts, no pod-loss survival). See [Single-Pod Mode](docs/horizontal-scaling/single-pod.md).
+
+- **Large index sharding** — When a single Meilisearch node cannot fit your corpus in RAM, Miroir stripes it across multiple nodes with configurable replication factor.
+
+Additional production resources:
+- [Production Deployment Guide](docs/onboarding/production.md) — Operational considerations, monitoring, and troubleshooting
+- [Versioning Policy](docs/versioning-policy.md) — Backward compatibility commitments and upgrade guidance
--- a/docs/horizontal-scaling/sizing.md
+++ b/docs/horizontal-scaling/sizing.md
@ -0,0 +1,79 @@
+# Deployment Sizing Guide
+
+This guide provides a sizing matrix for provisioning Miroir orchestrator pods based on corpus size and query throughput. Meilisearch node sizing follows the guidance in [plan.md §6](../../plan/plan.md) independently.
+
+## Sizing matrix
+
+| Corpus | Peak QPS | Orchestrator pods | Task store |
+|--------|----------|-------------------|------------|
+| ≤ 10 GB | ≤ 500 | 2 (HA) | Redis (or SQLite if replicas=1) |
+| ≤ 50 GB | ≤ 2 k | 2–4 (HPA) | Redis |
+| ≤ 200 GB | ≤ 5 k | 4–8 (HPA) | Redis |
+| ≤ 1 TB | ≤ 20 k | 8–12 (HPA) | Redis |
+| ≤ 5 TB | ≤ 100 k | 12–24 (HPA) | Redis (clustered or Sentinel) |
+
+**Orchestrator pod specification:** 2 vCPU / 3.75 GB per pod.
+
+**Key insight:** Orchestrator count scales with *query throughput*, while Meilisearch node count scales with *corpus size* and replication factor. These are orthogonal axes.
+
+## Task-store memory accounting
+
+When Redis is the task store, it backs shared state for multiple subsystems:
+
+- **Idempotency replay keys** — request deduplication cache
+- **Session pinning rows** — per-session sticky routing state
+- **Alias cache** — atomic index alias mappings
+- **Background job queue** — chunked dump import, reshard backfill jobs
+- **Leader lease** — HA coordinator election state
+- **CDC overflow buffer** — change-data-capture spill-over (when configured)
+- **Search UI rate-limit buckets** — IP-based rate limiter state
+
+Add **~20 MB for search UI rate-limit buckets per 10k active IPs** on top of the task-store baseline when `search_ui.rate_limit.backend: redis`. Bucket rows auto-expire per `redis_ttl_s`, keeping the footprint bounded even under IP-scan or spray attacks.
+
+## Worked example: ≤ 200 GB / ≤ 5 k QPS
+
+**From the table:** 4–8 orchestrator pods (HPA-scaled between these limits), Redis task store.
+
+### Memory budget validation
+
+Per [plan.md §14.2](../plan/plan.md#142-per-pod-memory-budget), steady-state per-pod memory at default config:
+
+| Component | Budget |
+|-----------|--------|
+| Baseline (runtime + pools) | ~330 MB |
+| Request/response buffers (p99 concurrent) | 200 MB |
+| Task registry + idempotency + sessions | 250 MB |
+| Feature overhead (§13.11–21 features) | ~200 MB |
+| Allocator headroom | ~800 MB |
+| **Steady-state total (idle background)** | **~1.2 GB** |
+| **With one heavy background job active** | **~1.7 GB** |
+
+At 4–8 pods, cluster-wide steady-state memory is 4.8–9.6 GB, which fits within a single Redis instance (allocate 4–8 GB for Redis at this tier). Heavy background jobs only run on the pod that claimed them from the shared queue — not all pods simultaneously — so the per-pod budget stays within envelope.
+
+### Query throughput validation
+
+Per [plan.md §14.3](../../plan/plan.md#143-per-pod-cpu-budget):
+
+- **Small searches** (1 KB responses): ~3 kQPS per pod at 70% CPU
+- **Large searches** (10 KB responses): ~1 kQPS per pod at 70% CPU
+
+At 5 kQPS peak with 4–8 pods:
+- Each pod handles 625–1250 QPS
+- This is within the 1–3 kQPS per-pod envelope
+- HPA will scale up toward 8 pods during sustained peak
+
+### Result
+
+The ≤ 200 GB / ≤ 5 k QPS row is validated: 4–8 orchestrator pods with Redis task store can handle the workload within the 2 vCPU / 3.75 GB per-pod resource envelope.
+
+## When to escalate
+
+If your workload exceeds the ≤ 5 TB / ≤ 100 k QPS tier, or if you're hitting resource limits despite following this matrix, consider:
+
+1. **Vertical scaling escape valve** — For constrained environments, a single larger pod (e.g., 4 vCPU / 8 GB) is supported but not recommended for production. See [plan.md §14.10](../../plan/plan.md#1410-vertical-scaling-escape-valve).
+
+2. **Redis clustering** — At very high scale, consider Redis Cluster or Sentinel for the task store to improve availability and distribute memory pressure.
+
+3. **Tune feature flags** — Disable unused capabilities (e.g., multi-search, vector search, shadow tee) to reclaim memory. Every feature in [plan.md §13](../../plan/plan.md#13-feature-scaling-modes) has an `enabled: true` knob that can be flipped off.
+
+4. **Consult the metrics** — Use the resource-pressure metrics in [plan.md §14.9](../../plan/plan.md#149-resource-pressure-metrics-and-alerts) to identify the bottleneck (CPU, memory, request queue depth, or background job backlog).
--- a/docs/onboarding/production.md
+++ b/docs/onboarding/production.md
@ -0,0 +1,188 @@
+# Production Deployment Guide
+
+This guide covers operational considerations for running Miroir in production.
+
+## Sizing
+
+Start with the [Deployment Sizing Guide](../horizontal-scaling/sizing.md) to determine the number of orchestrator pods and task store configuration for your workload.
+
+## Resource envelope
+
+Each orchestrator pod is designed for **2 vCPU / 3.75 GB RAM**. This matches common small-instance tiers across cloud providers:
+
+- AWS: t3.medium
+- GCP: e2-medium
+- Hetzner: CX22
+- Rackspace Spot: 2c/3.75GB
+
+See [plan.md §14](../plan/plan.md#14-resource-envelope-and-horizontal-scaling) for the full resource budget breakdown.
+
+## Task store selection
+
+| Replicas | Recommended task store |
+|----------|----------------------|
+| 1 | SQLite (default) |
+| 2+ | Redis (required) |
+
+The Helm chart's `values.schema.json` enforces this requirement — it rejects configurations where `miroir.replicas > 1` and `taskStore.backend: sqlite`.
+
+For Redis deployment modes:
+- **Small deployments** (≤ 200 GB corpus): Single Redis instance is sufficient
+- **Medium deployments** (≤ 1 TB corpus): Redis with persistence enabled
+- **Large deployments** (≤ 5 TB corpus): Redis Cluster or Sentinel for HA
+
+## Horizontal Pod Autoscaler
+
+Enable HPA for production deployments with variable traffic:
+
+```yaml
+miroir:
+  hpa:
+    enabled: true
+    minReplicas: 2
+    maxReplicas: 24
+```
+
+HPA requires `taskStore.backend: redis` and `miroir.replicas >= 2`. The chart enforces these constraints.
+
+See the [sizing matrix](../horizontal-scaling/sizing.md#sizing-matrix) for recommended replica ranges per workload tier.
+
+## High availability
+
+### Minimum HA configuration
+
+- **2 orchestrator pods** (handles one pod failure without downtime)
+- **Redis task store** (shared state across pods)
+- **Replication factor ≥ 2** for Meilisearch (handles one node failure per shard group)
+
+### Leader election
+
+The orchestrator uses Redis-based leader election for operations that require exactly-one semantics (settings broadcast, ILM rollover). Leader lease TTL is 30s with heartbeat renewal at 10s intervals — a new leader is elected within 30s if the current leader fails.
+
+### Pod disruption budgets
+
+The chart includes a PodDisruptionBudget that ensures minimum availability during voluntary disruptions:
+
+```yaml
+minAvailable: 1
+```
+
+For stricter guarantees, adjust to `minAvailable: 2` or use percentage-based policies.
+
+## Monitoring
+
+### Resource pressure metrics
+
+Key metrics to monitor:
+
+| Metric | Meaning | Alert threshold |
+|--------|---------|-----------------|
+| `miroir_requests_in_flight` | Concurrent requests | > 80% of `server.max_concurrent_requests` |
+| `miroir_background_queue_depth` | Pending background jobs | > 10 for > 5min |
+| `miroir_task_store_latency_seconds` | Task store operation p99 | > 100ms |
+| Container CPU | Orchestrator CPU utilization | > 80% sustained |
+| Container memory | Orchestrator RAM usage | > 85% sustained |
+
+See [plan.md §14.9](../plan/plan.md#149-resource-pressure-metrics-and-alerts) for the full alerting catalog.
+
+### Search UI rate limiting
+
+When `miroir.replicas > 1`, the Search UI rate limiter **must** use Redis backend:
+
+```yaml
+search_ui:
+  rate_limit:
+    backend: redis  # Required for multi-pod deployments
+```
+
+With `backend: local`, the effective cluster-wide rate is `per_ip × pod_count` because each pod maintains its own bucket table.
+
+## Vertical scaling escape valve
+
+If your environment cannot support horizontal scaling (e.g., single-node Kubernetes), you can use a larger pod size (e.g., 4 vCPU / 8 GB). This is supported but not recommended for production — horizontal scaling provides better fault isolation and elasticity.
+
+See [plan.md §14.10](../plan/plan.md#1410-vertical-scaling-escape-valve) for trade-offs.
+
+## Feature flags for memory-constrained deployments
+
+Every advanced capability has an `enabled: true` knob that can be flipped off to reclaim memory:
+
+| Feature | Memory savings | Config path |
+|---------|---------------|-------------|
+| Vector search | ~30 MB per pod | `vector_search.enabled` |
+| Multi-search | ~5 MB per pod | `multi_search.enabled` |
+| Shadow tee | ~50 MB per pod (5% sample) | `shadow.enabled` |
+| CDC publisher | ~64 MB per pod | `cdc.enabled` |
+
+See [plan.md §13](../plan/plan.md#13-feature-scaling-modes) for the full feature list and scaling modes.
+
+## Backup and recovery
+
+### Meilisearch data
+
+Meilisearch persists index data to disk at `/meilisearch-data`. Backup strategy:
+
+1. **Snapshot volumes** — Take volume snapshots before index operations (reshard, ILM rollover)
+2. **Dump exports** — Use `/_indexes/{uid}/documents/export` for logical backups
+3. **RG/RF awareness** — With replication factor > 1, you can survive node loss without data loss
+
+### Task store (Redis)
+
+Redis task store contains:
+- Idempotency keys (ephemeral, TTL 24h)
+- Session pinning state (ephemeral, TTL per session)
+- Background job queues (rebuildable from operations log)
+- Leader lease (ephemeral, auto-recoverable)
+
+Redis data is **rebuildable** — a fresh Redis instance is acceptable after failure. The orchestrator will reconstruct queues and lease state on startup.
+
+For persistence:
+- Enable RDB snapshots (`save 900 1`, `save 300 10`, `save 60 10000`)
+- Or use AOF (`appendonly yes`) for stronger durability
+
+### Configuration
+
+Store your Helm values in git. The chart supports external secrets for sensitive values (API keys, JWT secrets).
+
+## Upgrade path
+
+See [versioning-policy.md](../versioning-policy.md) for backward compatibility commitments.
+
+Upgrade procedure:
+1. Read the changelog for breaking changes
+2. Test in non-production first
+3. Roll out orchestrator pods first (Meilisearch API compatibility)
+4. Update Meilisearch nodes independently
+
+## Troubleshooting
+
+### Orchestrator pods stuck in CrashLoopBack
+
+Check task store connectivity:
+```bash
+kubectl logs -n search deployment/miroir --tail 100 | grep -i task
+```
+
+If Redis is unreachable, verify `taskStore.backend` and connection settings.
+
+### High memory usage
+
+Identify the culprit:
+1. Check `miroir_idempotency_cache_entries` — idempotency cache may be oversized
+2. Check `miroir_session_pinning_active_sessions` — session pinning may be leaking
+3. Review feature flags — disable unused capabilities
+
+### HPA not scaling
+
+Verify HPA metrics are reporting:
+```bash
+kubectl get hpa -n search
+```
+
+If metrics are `<unknown>`, install or configure the Metrics Server / Prometheus Adapter.
+
+## Further reading
+
+- [Deployment Sizing Guide](../horizontal-scaling/sizing.md) — Corpus/QPS → pod count matrix
+- [plan.md §14](../plan/plan.md#14-resource-envelope-and-horizontal-scaling) — Full resource envelope documentation
+- [plan.md §13](../plan/plan.md#13-feature-scaling-modes) — Per-feature scaling behavior
--- a/notes/bf-1p4v.md
+++ b/notes/bf-1p4v.md
@ -0,0 +1,9 @@
+# bf-1p4v: Borrow of moved value `state`
+
+The reported compile error was already fixed in the codebase. Line 568 in `crates/miroir-proxy/src/main.rs` correctly uses `.with_state(state.clone())` instead of `.with_state(state)`.
+
+The fix works because:
+1. `UnifiedState` derives `Clone` (line 39)
+2. `state.clone()` is passed to `.with_state()`, leaving the original `state` available for the metrics server on line 590
+
+Build verified: `cargo build` succeeds with no errors.