Class CacheDataLocalFile¶
Defined in File CacheData.h
Inheritance Relationships¶
Base Type¶
public ral::cache::CacheData(Class CacheData)
Class Documentation¶
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class
ral::cache::CacheDataLocalFile: 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
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CacheDataLocalFile(std::unique_ptr<ral::frame::BlazingTable> table, std::string orc_files_path, std::string ctx_token)¶ 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. @ param ctx_id The context token to identify the query that generated the file.
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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.
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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.
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size_t
fileSizeInBytes() const¶ Get the amount of disk space consumed by this CacheData Having this function allows us to have one api for seeing the consumption of all the CacheData objects that are currently in Caches.
- Return
The number of bytes the ORC file consumes.
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inline virtual void
set_names(const std::vector<std::string> &names) override¶ Set the names of the columns to pass when decache if needed.
- Parameters
names: a vector of the column names.
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inline virtual
~CacheDataLocalFile()¶ Destructor
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inline std::string
filePath() const¶ Get the file path of the ORC file.
- Return
The path to the ORC file.
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