Qdrant local mode does not normalize vectors

[kacperlukawski]

Qdrant server normalizes vectors when Cosine distance is used. However, this is not done when Qdrant local in-memory mode is used. That might not be clear for a locally created application pointing to the Qdrant server in production.

How to reproduce?

import qdrant_client

client = qdrant_client.QdrantClient(":memory:")
client.create_collection("test", vectors_config={"size": 10, "distance": "Cosine"})
client.upsert("test", points=[models.PointStruct(id=1, vector=[1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0])])

Even though the point was stored in a collection using Cosine distance, it was not normalized.

client.scroll("test", with_vectors=True)
# out: ([Record(id=1, payload={}, vector=[1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0])], None)