Contents

Class CacheDataIO

Inheritance Relationships

Base Type

Class Documentation

class ral::cache::CacheDataIO : public ral::cache::CacheData

A CacheData that stores is data in an ORC file. This allows us to cache onto filesystems to allow larger queries to run on limited resources. This is the least performant cache in most instances.

Public Functions

CacheDataIO(ral::io::data_handle handle, std::shared_ptr<ral::io::data_parser> parser, ral::io::Schema schema, ral::io::Schema file_schema, std::vector<int> row_group_ids, std::vector<int> projections)

Constructor

Parameters

  • table: The BlazingTable that is converted into an ORC file and stored on disk. @ param orc_files_path The path where the file should be stored.

virtual std::unique_ptr<ral::frame::BlazingTable> decache() override

Constructor

Parameters

  • table: The BlazingTable that is converted into an ORC file and stored on disk. @ param orc_files_path The path where the file should be stored.

virtual size_t sizeInBytes() const override

Get the amount of GPU memory that the decached BlazingTable WOULD consume. Having this function allows us to have one api for seeing how much GPU memory is necessary to decache the file from disk.

Return

The number of bytes needed for the BlazingTable decache would generate.

inline virtual void set_names(const std::vector<std::string> &names) override

Set the names of the columns from the schema.

Parameters

  • names: a vector of the column names.

inline virtual ~CacheDataIO()

Destructor

Class CacheData Class CacheDataLocalFile