Structure Description

The parameters used by the APIs provided by KVecturbo involve the VectorArray and PQParams structures. For details, see Table 1 and Table 2.

**Table 1** VectorArray field description
Field	Description	Data Type	Value Range
maxLen	Maximum number of vectors.	int	[1,10000000]
length	Number of vectors.	int	[1, maxLen], where maxLen is a field in the VectorArray structure, indicating the maximum number of vectors.
dim	Vector dimension.	int	[1,2000]
itemSize	Length of a single vector.	size_t	The value cannot be 0.
items	Start addresses of length vectors.	char*	The value cannot be null.

**Table 2** PQParams field description
Field	Description	Data Type	Value Range
dim	Dimension.	int	[1,2000]
pqM	Number of subspaces.	int	[1,dim], where dim is a field in the PQParams structure, indicating the vector dimension.
pqKsub	Number of cluster centroids in the subspace.	int	[1,256]
functype	Distance type.	int	[1,3] 1: L2 type. 2: IP type. 3: Cosine type.
subItemSize	Codeword size.	size_t	The value cannot be 0.
pqTable	Codebook.	char*	The value cannot be null.

Parent topic: KVecturbo APIs