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Update qdrant-fundamentals.md

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Andrey Vasnetsov
2025-04-30 17:08:25 +02:00
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@@ -46,6 +46,14 @@ Make sure to check that the collection status is `green` and that the number of
Collection info API in Qdrant returns an approximate number of points in the collection.
If you need an exact number, you can use the [count](/documentation/concepts/points/#counting-points) API.
### Vectors in the collection don't match what I uploaded.
There are two possible reasons for this:
- You used the `Cosine` distance metric in the [collection settings](/concepts/collections/#collections). In this case, Qdrant pre-normalizes your vectors for faster distance computation. If you strictly need the original vectors to be preserved, consider using the `Dot` distance metric instead.
- You used the `uint8` [datatype](/documentation/concepts/vectors/#datatypes) to store vectors. `uint8` requires a special format for input values, which might not be compatible with the typical output of embedding models.
## Search
### How does Qdrant handle real-time data updates and search?