Structure Description

The parameters used by the KVecTurbo APIs 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	If the value is too large, the memory allocation may fail due to insufficient system memory resources.
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 Interface