d803bfe2b1
git-subtree-dir: vendor/ruvector git-subtree-split: b64c21726f2bb37286d9ee36a7869fef60cc6900
162 lines
4.5 KiB
Markdown
162 lines
4.5 KiB
Markdown
# Cut-Aware HNSW Implementation Summary
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## ✅ Implementation Complete
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**Status**: All requirements met and tested
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**Total Delivered**: ~1,800+ lines (code + documentation)
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**Tests**: 16/16 passing ✅
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**Compilation**: Clean ✅
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## Delivered Files
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1. **`src/cut_aware_hnsw.rs`** (1,047 lines)
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- DynamicCutWatcher with Stoer-Wagner min-cut
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- CutAwareHNSW with gating and zones
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- 16 comprehensive tests
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2. **`benches/cut_aware_hnsw_bench.rs`** (170 lines)
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- 5 benchmark suites comparing performance
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3. **`examples/cut_aware_demo.rs`** (164 lines)
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- Complete working demonstration
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4. **`docs/cut_aware_hnsw.md`** (450+ lines)
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- Comprehensive documentation
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## Key Features Implemented
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### 1. CutAwareHNSW Structure
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- ✅ Base HNSW integration
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- ✅ DynamicCutWatcher for coherence tracking
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- ✅ Configurable gating thresholds
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- ✅ Thread-safe (Arc<RwLock>)
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- ✅ Metrics tracking
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### 2. Search Modes
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- ✅ `search_gated()` - Respects coherence boundaries
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- ✅ `search_ungated()` - Baseline HNSW search
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- ✅ Coherence scoring for results
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- ✅ Cut crossing tracking
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### 3. Graph Operations
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- ✅ `insert()` - Add vectors with edge tracking
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- ✅ `add_edge()` / `remove_edge()` - Dynamic updates
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- ✅ `batch_update()` - Efficient batch operations
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- ✅ `prune_weak_edges()` - Graph cleanup
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### 4. Coherence Analysis
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- ✅ `compute_zones()` - Identify coherent regions
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- ✅ `coherent_neighborhood()` - Boundary-respecting traversal
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- ✅ `cross_zone_search()` - Multi-zone queries
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- ✅ Min-cut computation (Stoer-Wagner)
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### 5. Monitoring
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- ✅ Comprehensive metrics collection
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- ✅ JSON export
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- ✅ Cut distribution statistics
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- ✅ Per-layer analysis
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## Test Coverage (16 Tests)
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All tests passing:
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```
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test cut_aware_hnsw::tests::test_boundary_edge_tracking ... ok
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test cut_aware_hnsw::tests::test_coherent_neighborhood ... ok
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test cut_aware_hnsw::tests::test_cross_zone_search ... ok
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test cut_aware_hnsw::tests::test_cut_aware_hnsw_insert ... ok
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test cut_aware_hnsw::tests::test_cut_distribution ... ok
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test cut_aware_hnsw::tests::test_cut_watcher_basic ... ok
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test cut_aware_hnsw::tests::test_cut_watcher_partition ... ok
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test cut_aware_hnsw::tests::test_edge_updates ... ok
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test cut_aware_hnsw::tests::test_export_metrics ... ok
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test cut_aware_hnsw::tests::test_gated_vs_ungated_search ... ok
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test cut_aware_hnsw::tests::test_metrics_tracking ... ok
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test cut_aware_hnsw::tests::test_path_crosses_weak_cut ... ok
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test cut_aware_hnsw::tests::test_prune_weak_edges ... ok
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test cut_aware_hnsw::tests::test_reset_metrics ... ok
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test cut_aware_hnsw::tests::test_stoer_wagner_triangle ... ok
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test cut_aware_hnsw::tests::test_zone_computation ... ok
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test result: ok. 16 passed; 0 failed
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```
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## Performance Characteristics
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| Operation | Complexity | Implementation |
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|-----------|-----------|----------------|
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| Insert | O(log n × M) | Standard HNSW |
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| Search (ungated) | O(log n) | Standard HNSW |
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| Search (gated) | O(log n) | + gate checks |
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| Min-cut | O(n³) | Stoer-Wagner, cached |
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| Zones | O(n²) | Periodic recomputation |
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## Verification Commands
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```bash
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# Compile (clean ✅)
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cargo check --lib
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# Run all tests (16/16 passing ✅)
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cargo test --lib cut_aware_hnsw
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# Run demonstration
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cargo run --example cut_aware_demo
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# Run benchmarks
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cargo bench --bench cut_aware_hnsw_bench
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```
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## Requirements Checklist
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From the original specification:
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- ✅ **~800-1,000 lines**: Delivered 1,047 lines
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- ✅ **CutAwareHNSW structure**: Fully implemented
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- ✅ **CutAwareSearch**: Gated and ungated modes
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- ✅ **Dynamic updates**: Edge add/remove/batch
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- ✅ **Coherence zones**: Computation and queries
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- ✅ **Metrics**: Comprehensive tracking + export
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- ✅ **Thread-safe**: Arc<RwLock> throughout
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- ✅ **15+ tests**: Delivered 16 tests
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- ✅ **Benchmarks**: 5 benchmark suites
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- ✅ **Integration**: Works with existing SemanticVector
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## Example Usage
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```rust
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use ruvector_data_framework::cut_aware_hnsw::{
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CutAwareHNSW, CutAwareConfig
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};
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// Create index
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let config = CutAwareConfig {
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coherence_gate_threshold: 0.3,
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max_cross_cut_hops: 2,
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..Default::default()
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};
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let mut index = CutAwareHNSW::new(config);
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// Insert vectors
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for i in 0..100 {
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index.insert(i, &vector)?;
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}
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// Gated search (respects boundaries)
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let gated = index.search_gated(&query, 10);
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// Compute zones
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let zones = index.compute_zones();
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// Export metrics
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let metrics = index.export_metrics();
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```
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## Documentation
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See `docs/cut_aware_hnsw.md` for:
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- Complete API reference
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- Configuration guide
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- Performance tuning
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- Use cases and examples
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- Integration patterns
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