Function mindspore::dataset::CreateDatasetCache

Function Documentation

inline std::shared_ptr<DatasetCache> mindspore::dataset::CreateDatasetCache(session_id_type id, uint64_t mem_sz, bool spill, const std::optional<std::string> &hostname = std::nullopt, const std::optional<int32_t> &port = std::nullopt, const std::optional<int32_t> &num_connections = std::nullopt, const std::optional<int32_t> &prefetch_sz = std::nullopt)

Function the create a cache to be attached to a dataset.

Parameters

  • id – [in] A user assigned session id for the current pipeline.

  • mem_sz – [in] Size of the memory set aside for the row caching (default=0 which means unlimited, note that it might bring in the risk of running out of memory on the machine).

  • spill – [in] Spill to disk if out of memory.

  • hostname – [in] optional host name (default=std::nullopt, means to use “127.0.0.1”).

  • port – [in] optional port (default=std::nullopt, means to use 50052).

  • num_connections – [in] optional number of connections (default=std::nullopt, means to use 12).

  • prefetch_sz – [in] optional prefetch size (default=std::nullopt, means to use 20).

Returns

Shared pointer to DatasetCache. If error, nullptr is returned.

样例
/* Define a Cache object */
std::shared_ptr<DatasetCache> cache = CreateDatasetCache(233, 0, false, "127.0.0.1", 50053, 1, 1);

/* Define dataset path and MindData object */
std::string folder_path = "/path/to/image_directory";
std::shared_ptr<Dataset> ds = ImageFolder(folder_path, false, nullptr, {}, {}, cache);

/* Create iterator to read dataset */
std::shared_ptr<Iterator> iter = ds->CreateIterator();