Which vector index type in Cosmos DB NoSQL is designed for high recall on very large vector collections?
- A flat
- B quantizedFlat
- C diskANN (correct answer)
- D range
Shortcut: DiskANN is a graph-based index optimised for large-scale approximate nearest-neighbour search with high recall and low latency. flat is exact but scans everything; quantizedFlat compresses for smaller sets.