45a11212d2
* fix(vamana): medoid entry point, concurrent build crash and prune quality - Add DiskANN-standard medoid (centroid-closest point) as the persisted entry point, computed at dump time, replacing the fixed node-0 start. - Fix data races on node_chunks_ / dist_chunks_ / node_chunk_bases_ during concurrent build: add mutexes with double-checked locking and pre-reserve capacity so the lock-free read fast path never hits reallocation. - Fix RobustPrune for metrics with signed internal distance (quantized int8 cosine): introduce IndexMetric::build_distance_offset() to shift distances into a non-negative range, restoring a geometrically meaningful occlude_factor and improving graph quality / low-ef recall. |
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| .. | ||
| algorithm | ||
| framework | ||
| interface | ||
| metric | ||
| quantizer | ||
| utility | ||
| CMakeLists.txt | ||