Multi-threaded vector search over multiple segments can lead to inconsistent results #14180
Description
Description
Related to: #14167
But multi-threaded search over multiple segments in addition to multi-leaf collection (e.g. information sharing) can lead to consistent results at low k values.
It is possible to get more consistent results, and likely remove most inconsistencies by simply gathering more neighbors (k in the query, fanout in lucene util, or efSearch if you will...). However, while HNSW search is approximate, we should strive for consistency.
Version and environment details
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