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Reference Guide
ROOT::Experimental::Detail::RPageSinkFile Class Reference


Storage provider that write ntuple pages into a file

The written file can be either in ROOT format or in RNTuple bare format.

Definition at line 54 of file RPageStorageFile.hxx.

Public Member Functions

 RPageSinkFile (std::string_view ntupleName, std::string_view path, const RNTupleWriteOptions &options)
 
 RPageSinkFile (std::string_view ntupleName, std::string_view path, const RNTupleWriteOptions &options, std::unique_ptr< TFile > &file)
 
 RPageSinkFile (std::string_view ntupleName, TFile &file, const RNTupleWriteOptions &options)
 
virtual ~RPageSinkFile ()
 
RNTupleMetricsGetMetrics () final
 Page storage implementations usually have their own metrics. More...
 
void ReleasePage (RPage &page) final
 Every page store needs to be able to free pages it handed out. More...
 
RPage ReservePage (ColumnHandle_t columnHandle, std::size_t nElements=0) final
 Get a new, empty page for the given column that can be filled with up to nElements. More...
 
- Public Member Functions inherited from ROOT::Experimental::Detail::RPageSink
 RPageSink (std::string_view ntupleName, const RNTupleWriteOptions &options)
 
virtual ~RPageSink ()
 
ColumnHandle_t AddColumn (DescriptorId_t fieldId, const RColumn &column) final
 Register a new column. More...
 
void CommitCluster (NTupleSize_t nEntries)
 Finalize the current cluster and create a new one for the following data. More...
 
void CommitDataset ()
 Finalize the current cluster and the entrire data set. More...
 
void CommitPage (ColumnHandle_t columnHandle, const RPage &page)
 Write a page to the storage. The column must have been added before. More...
 
void Create (RNTupleModel &model)
 Physically creates the storage container to hold the ntuple (e.g., a keys a TFile or an S3 bucket) To do so, Create() calls CreateImpl() after updating the descriptor. More...
 
EPageStorageType GetType () final
 Whether the concrete implementation is a sink or a source. More...
 
- Public Member Functions inherited from ROOT::Experimental::Detail::RPageStorage
 RPageStorage (std::string_view name)
 
 RPageStorage (const RPageStorage &other)=delete
 
virtual ~RPageStorage ()
 
RPageStorageoperator= (const RPageStorage &other)=delete
 

Static Public Attributes

static constexpr std::size_t kDefaultElementsPerPage = 10000
 

Protected Member Functions

RClusterDescriptor::RLocator CommitClusterImpl (NTupleSize_t nEntries) final
 
void CommitDatasetImpl () final
 
RClusterDescriptor::RLocator CommitPageImpl (ColumnHandle_t columnHandle, const RPage &page) final
 
void CreateImpl (const RNTupleModel &model) final
 

Private Attributes

std::uint64_t fClusterMaxOffset = 0
 Byte offset of the end of the last page of the current cluster. More...
 
std::uint64_t fClusterMinOffset = std::uint64_t(-1)
 Byte offset of the first page of the current cluster. More...
 
RNTupleCompressor fCompressor
 Helper for zipping keys and header / footer; comprises a 16MB zip buffer. More...
 
RNTupleMetrics fMetrics
 
std::unique_ptr< RPageAllocatorHeapfPageAllocator
 
std::unique_ptr< Internal::RNTupleFileWriterfWriter
 

Additional Inherited Members

- Public Types inherited from ROOT::Experimental::Detail::RPageStorage
using ColumnHandle_t = RColumnHandle
 The column handle identifies a column with the current open page storage. More...
 
- Static Public Member Functions inherited from ROOT::Experimental::Detail::RPageSink
static std::unique_ptr< RPageSinkCreate (std::string_view ntupleName, std::string_view location, const RNTupleWriteOptions &options=RNTupleWriteOptions())
 Guess the concrete derived page source from the file name (location) More...
 
- Protected Attributes inherited from ROOT::Experimental::Detail::RPageSink
RNTupleDescriptorBuilder fDescriptorBuilder
 
DescriptorId_t fLastClusterId = 0
 
DescriptorId_t fLastColumnId = 0
 
DescriptorId_t fLastFieldId = 0
 Building the ntuple descriptor while writing is done in the same way for all the storage sink implementations. More...
 
std::vector< RClusterDescriptor::RColumnRangefOpenColumnRanges
 Keeps track of the number of elements in the currently open cluster. Indexed by column id. More...
 
std::vector< RClusterDescriptor::RPageRangefOpenPageRanges
 Keeps track of the written pages in the currently open cluster. Indexed by column id. More...
 
const RNTupleWriteOptions fOptions
 
NTupleSize_t fPrevClusterNEntries = 0
 
- Protected Attributes inherited from ROOT::Experimental::Detail::RPageStorage
std::string fNTupleName
 

#include <ROOT/RPageStorageFile.hxx>

Inheritance diagram for ROOT::Experimental::Detail::RPageSinkFile:
[legend]

Constructor & Destructor Documentation

◆ RPageSinkFile() [1/3]

ROOT::Experimental::Detail::RPageSinkFile::RPageSinkFile ( std::string_view  ntupleName,
std::string_view  path,
const RNTupleWriteOptions options 
)

Definition at line 37 of file RPageStorageFile.cxx.

◆ RPageSinkFile() [2/3]

ROOT::Experimental::Detail::RPageSinkFile::RPageSinkFile ( std::string_view  ntupleName,
std::string_view  path,
const RNTupleWriteOptions options,
std::unique_ptr< TFile > &  file 
)

Definition at line 64 of file RPageStorageFile.cxx.

◆ RPageSinkFile() [3/3]

ROOT::Experimental::Detail::RPageSinkFile::RPageSinkFile ( std::string_view  ntupleName,
TFile file,
const RNTupleWriteOptions options 
)

Definition at line 51 of file RPageStorageFile.cxx.

◆ ~RPageSinkFile()

ROOT::Experimental::Detail::RPageSinkFile::~RPageSinkFile ( )
virtual

Definition at line 77 of file RPageStorageFile.cxx.

Member Function Documentation

◆ CommitClusterImpl()

ROOT::Experimental::RClusterDescriptor::RLocator ROOT::Experimental::Detail::RPageSinkFile::CommitClusterImpl ( NTupleSize_t  nEntries)
finalprotectedvirtual

Implements ROOT::Experimental::Detail::RPageSink.

Definition at line 136 of file RPageStorageFile.cxx.

◆ CommitDatasetImpl()

void ROOT::Experimental::Detail::RPageSinkFile::CommitDatasetImpl ( )
finalprotectedvirtual

Implements ROOT::Experimental::Detail::RPageSink.

Definition at line 147 of file RPageStorageFile.cxx.

◆ CommitPageImpl()

ROOT::Experimental::RClusterDescriptor::RLocator ROOT::Experimental::Detail::RPageSinkFile::CommitPageImpl ( ColumnHandle_t  columnHandle,
const RPage page 
)
finalprotectedvirtual

Implements ROOT::Experimental::Detail::RPageSink.

Definition at line 97 of file RPageStorageFile.cxx.

◆ CreateImpl()

void ROOT::Experimental::Detail::RPageSinkFile::CreateImpl ( const RNTupleModel model)
finalprotectedvirtual

Implements ROOT::Experimental::Detail::RPageSink.

Definition at line 82 of file RPageStorageFile.cxx.

◆ GetMetrics()

RNTupleMetrics& ROOT::Experimental::Detail::RPageSinkFile::GetMetrics ( )
inlinefinalvirtual

Page storage implementations usually have their own metrics.

Implements ROOT::Experimental::Detail::RPageStorage.

Definition at line 86 of file RPageStorageFile.hxx.

◆ ReleasePage()

void ROOT::Experimental::Detail::RPageSinkFile::ReleasePage ( RPage page)
finalvirtual

Every page store needs to be able to free pages it handed out.

But Sinks and sources have different means of allocating pages.

Implements ROOT::Experimental::Detail::RPageStorage.

Definition at line 171 of file RPageStorageFile.cxx.

◆ ReservePage()

ROOT::Experimental::Detail::RPage ROOT::Experimental::Detail::RPageSinkFile::ReservePage ( ColumnHandle_t  columnHandle,
std::size_t  nElements = 0 
)
finalvirtual

Get a new, empty page for the given column that can be filled with up to nElements.

If nElements is zero, the page sink picks an appropriate size.

Implements ROOT::Experimental::Detail::RPageSink.

Definition at line 163 of file RPageStorageFile.cxx.

Member Data Documentation

◆ fClusterMaxOffset

std::uint64_t ROOT::Experimental::Detail::RPageSinkFile::fClusterMaxOffset = 0
private

Byte offset of the end of the last page of the current cluster.

Definition at line 66 of file RPageStorageFile.hxx.

◆ fClusterMinOffset

std::uint64_t ROOT::Experimental::Detail::RPageSinkFile::fClusterMinOffset = std::uint64_t(-1)
private

Byte offset of the first page of the current cluster.

Definition at line 64 of file RPageStorageFile.hxx.

◆ fCompressor

RNTupleCompressor ROOT::Experimental::Detail::RPageSinkFile::fCompressor
private

Helper for zipping keys and header / footer; comprises a 16MB zip buffer.

Definition at line 68 of file RPageStorageFile.hxx.

◆ fMetrics

RNTupleMetrics ROOT::Experimental::Detail::RPageSinkFile::fMetrics
private

Definition at line 59 of file RPageStorageFile.hxx.

◆ fPageAllocator

std::unique_ptr<RPageAllocatorHeap> ROOT::Experimental::Detail::RPageSinkFile::fPageAllocator
private

Definition at line 60 of file RPageStorageFile.hxx.

◆ fWriter

std::unique_ptr<Internal::RNTupleFileWriter> ROOT::Experimental::Detail::RPageSinkFile::fWriter
private

Definition at line 62 of file RPageStorageFile.hxx.

◆ kDefaultElementsPerPage

constexpr std::size_t ROOT::Experimental::Detail::RPageSinkFile::kDefaultElementsPerPage = 10000
static

Definition at line 56 of file RPageStorageFile.hxx.


The documentation for this class was generated from the following files: