Zilliz Cloud supports 3 types of metrics.
Euclidean (L2) measures the distance between two vectors in a plane. The smaller the result, the more similar the two vectors are.
Inner Product (IP) multiplies two vectors. The more positive the result, the more similar the two vectors are.
[Beta] Cosine measures the cosine value of the angle between two vectors.
Note that the cosine metric type is still in Beta version. If you need to choose this metric type, you need to upgrade your cluster to Beta version first.