AscendIndexIVFPQConfig

inline AscendIndexIVFPQConfig(std::vector<int> devices, int64_t resourceSize = IVFFPQ_DEFAULT_MEM)

Constructor of AscendIndexIVFPQConfig, which is used to generate AscendIndexIVFPQConfig. The processor resources on the NPU and the resource pool size are configured based on the value configured in devices.

std::vector<int> devices: processor resources on the NPU.

int resourceSize: preset memory pool size on the device, in bytes. It is the memory space for storing intermediate results during computing to prevent performance fluctuation caused by dynamic memory allocation. The default parameter is IVFPQ_DEFAULT_MEM in the header file. This parameter is determined by the base library capacity and the number of search batches. If the base library has 10 million records or more and the number of the batches is greater than or equal to 16, set this parameter to 1024 MB.

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• The value of devices must be a valid processor ID.
• The value of resourceSize cannot exceed 1024 MB (1024 x 1024 x 1024 bytes).