Base class for a sink with a physical storage backend.

Definition at line 299 of file RPageStorage.hxx.

Classes
struct	RCounters
	Default I/O performance counters that get registered in fMetrics. More...

Public Member Functions
	RPagePersistentSink (const RPagePersistentSink &)=delete

	RPagePersistentSink (RPagePersistentSink &&)=default

	RPagePersistentSink (std::string_view ntupleName, const RNTupleWriteOptions &options)

	~RPagePersistentSink () override

ColumnHandle_t	AddColumn (DescriptorId_t fieldId, const RColumn &column) final
	Register a new column.

std::uint64_t	CommitCluster (NTupleSize_t nEntries) final
	Finalize the current cluster and create a new one for the following data.

void	CommitClusterGroup () final
	Write out the page locations (page list envelope) for all the committed clusters since the last call of CommitClusterGroup (or the beginning of writing).

void	CommitDataset () final
	Finalize the current cluster and the entrire data set.

void	CommitPage (ColumnHandle_t columnHandle, const RPage &page) final
	Write a page to the storage. The column must have been added before.

void	CommitSealedPage (DescriptorId_t physicalColumnId, const RPageStorage::RSealedPage &sealedPage) final
	Write a preprocessed page to storage. The column must have been added before.

void	CommitSealedPageV (std::span< RPageStorage::RSealedPageGroup > ranges) final
	Write a vector of preprocessed pages to storage. The corresponding columns must have been added before.

const RNTupleDescriptor &	GetDescriptor () const final
	Return the RNTupleDescriptor being constructed.

void	InitFromDescriptor (const RNTupleDescriptor &descriptor)
	Initialize sink based on an existing descriptor and fill into the descriptor builder.

void	InitImpl (RNTupleModel &model) final
	Updates the descriptor and calls InitImpl() that handles the backend-specific details (file, DAOS, etc.)

RPagePersistentSink &	operator= (const RPagePersistentSink &)=delete

RPagePersistentSink &	operator= (RPagePersistentSink &&)=default

void	UpdateSchema (const RNTupleModelChangeset &changeset, NTupleSize_t firstEntry) final
	Incorporate incremental changes to the model into the ntuple descriptor.

Public Member Functions inherited from ROOT::Experimental::Internal::RPageSink
	RPageSink (const RPageSink &)=delete

	RPageSink (RPageSink &&)=default

	RPageSink (std::string_view ntupleName, const RNTupleWriteOptions &options)

	~RPageSink () override

void	DropColumn (ColumnHandle_t) final
	Unregisters a column.

virtual RSinkGuard	GetSinkGuard ()

EPageStorageType	GetType () final
	Whether the concrete implementation is a sink or a source.

const RNTupleWriteOptions &	GetWriteOptions () const
	Returns the sink's write options.

void	Init (RNTupleModel &model)
	Physically creates the storage container to hold the ntuple (e.g., a keys a TFile or an S3 bucket) Init() associates column handles to the columns referenced by the model.

bool	IsInitialized () const

RPageSink &	operator= (const RPageSink &)=delete

RPageSink &	operator= (RPageSink &&)=default

virtual RPage	ReservePage (ColumnHandle_t columnHandle, std::size_t nElements)=0
	Get a new, empty page for the given column that can be filled with up to nElements.

Public Member Functions inherited from ROOT::Experimental::Internal::RPageStorage
	RPageStorage (const RPageStorage &other)=delete

	RPageStorage (RPageStorage &&other)=default

	RPageStorage (std::string_view name)

virtual	~RPageStorage ()

virtual Detail::RNTupleMetrics &	GetMetrics ()
	Returns the default metrics object.

const std::string &	GetNTupleName () const
	Returns the NTuple name.

RPageStorage &	operator= (const RPageStorage &other)=delete

RPageStorage &	operator= (RPageStorage &&other)=default

virtual void	ReleasePage (RPage &page)=0
	Every page store needs to be able to free pages it handed out.

void	SetTaskScheduler (RTaskScheduler *taskScheduler)

Static Public Member Functions
static std::unique_ptr< RPageSink >	Create (std::string_view ntupleName, std::string_view location, const RNTupleWriteOptions &options=RNTupleWriteOptions())
	Guess the concrete derived page source from the location.

Protected Member Functions
virtual RNTupleLocator	CommitClusterGroupImpl (unsigned char *serializedPageList, std::uint32_t length)=0
	Returns the locator of the page list envelope of the given buffer that contains the serialized page list.

virtual std::uint64_t	CommitClusterImpl ()=0
	Returns the number of bytes written to storage (excluding metadata)

virtual void	CommitDatasetImpl (unsigned char *serializedFooter, std::uint32_t length)=0

virtual RNTupleLocator	CommitPageImpl (ColumnHandle_t columnHandle, const RPage &page)=0

virtual RNTupleLocator	CommitSealedPageImpl (DescriptorId_t physicalColumnId, const RPageStorage::RSealedPage &sealedPage)=0

virtual std::vector< RNTupleLocator >	CommitSealedPageVImpl (std::span< RPageStorage::RSealedPageGroup > ranges)
	Vector commit of preprocessed pages.

void	EnableDefaultMetrics (const std::string &prefix)
	Enables the default set of metrics provided by RPageSink.

virtual void	InitImpl (unsigned char *serializedHeader, std::uint32_t length)=0

Protected Member Functions inherited from ROOT::Experimental::Internal::RPageSink
RSealedPage	SealPage (const RPage &page, const RColumnElementBase &element, int compressionSetting)
	Helper for streaming a page.

Protected Member Functions inherited from ROOT::Experimental::Internal::RPageStorage
void	WaitForAllTasks ()

Protected Attributes
std::unique_ptr< RCounters >	fCounters

Internal::RNTupleDescriptorBuilder	fDescriptorBuilder

Protected Attributes inherited from ROOT::Experimental::Internal::RPageSink
std::unique_ptr< RNTupleCompressor >	fCompressor
	Helper to zip pages and header/footer; includes a 16MB (kMAXZIPBUF) zip buffer.

std::unique_ptr< RNTupleWriteOptions >	fOptions

Protected Attributes inherited from ROOT::Experimental::Internal::RPageStorage
Detail::RNTupleMetrics	fMetrics

std::string	fNTupleName

RTaskScheduler *	fTaskScheduler = nullptr

Private Attributes
std::uint64_t	fNextClusterInGroup = 0
	Remembers the starting cluster id for the next cluster group.

std::vector< RClusterDescriptor::RColumnRange >	fOpenColumnRanges
	Keeps track of the number of elements in the currently open cluster. Indexed by column id.

std::vector< RClusterDescriptor::RPageRange >	fOpenPageRanges
	Keeps track of the written pages in the currently open cluster. Indexed by column id.

NTupleSize_t	fPrevClusterNEntries = 0
	Used to calculate the number of entries in the current cluster.

RNTupleSerializer::RContext	fSerializationContext
	Used to map the IDs of the descriptor to the physical IDs issued during header/footer serialization.

Additional Inherited Members
Public Types inherited from ROOT::Experimental::Internal::RPageStorage
using	ColumnHandle_t = RColumnHandle
	The column handle identifies a column with the current open page storage.

using	SealedPageSequence_t = std::deque< RSealedPage >

Static Protected Member Functions inherited from ROOT::Experimental::Internal::RPageSink
static RSealedPage	SealPage (const RPage &page, const RColumnElementBase &element, int compressionSetting, void *buf, bool allowAlias=true)
	Seal a page using the provided buffer.

#include <ROOT/RPageStorage.hxx>

Inheritance diagram for ROOT::Experimental::Internal::RPagePersistentSink:

[legend]

Constructor & Destructor Documentation

◆ RPagePersistentSink() [1/3]

ROOT::Experimental::Internal::RPagePersistentSink::RPagePersistentSink	(	std::string_view	ntupleName,
		const RNTupleWriteOptions &	options
	)

Definition at line 387 of file RPageStorage.cxx.

◆ RPagePersistentSink() [2/3]

ROOT::Experimental::Internal::RPagePersistentSink::RPagePersistentSink ( const RPagePersistentSink & )

delete

◆ RPagePersistentSink() [3/3]

ROOT::Experimental::Internal::RPagePersistentSink::RPagePersistentSink ( RPagePersistentSink && )

default

◆ ~RPagePersistentSink()

ROOT::Experimental::Internal::RPagePersistentSink::~RPagePersistentSink ( )

override

Definition at line 393 of file RPageStorage.cxx.

Member Function Documentation

◆ AddColumn()

ROOT::Experimental::Internal::RPageStorage::ColumnHandle_t ROOT::Experimental::Internal::RPagePersistentSink::AddColumn	(	DescriptorId_t	fieldId,
		const RColumn &	column
	)

finalvirtual

Register a new column.

When reading, the column must exist in the ntuple on disk corresponding to the meta-data. When writing, every column can only be attached once.

Implements ROOT::Experimental::Internal::RPageStorage.

Definition at line 396 of file RPageStorage.cxx.

◆ CommitCluster()

std::uint64_t ROOT::Experimental::Internal::RPagePersistentSink::CommitCluster ( NTupleSize_t nNewEntries )

finalvirtual

Finalize the current cluster and create a new one for the following data.

Returns the number of bytes written to storage (excluding meta-data).

Implements ROOT::Experimental::Internal::RPageSink.

Definition at line 574 of file RPageStorage.cxx.

◆ CommitClusterGroup()

void ROOT::Experimental::Internal::RPagePersistentSink::CommitClusterGroup ( )

finalvirtual

Write out the page locations (page list envelope) for all the committed clusters since the last call of CommitClusterGroup (or the beginning of writing).

Implements ROOT::Experimental::Internal::RPageSink.

Definition at line 596 of file RPageStorage.cxx.

◆ CommitClusterGroupImpl()

virtual RNTupleLocator ROOT::Experimental::Internal::RPagePersistentSink::CommitClusterGroupImpl	(	unsigned char *	serializedPageList,
		std::uint32_t	length
	)

protectedpure virtual

Returns the locator of the page list envelope of the given buffer that contains the serialized page list.

Typically, the implementation takes care of compressing and writing the provided buffer.

Implemented in ROOT::Experimental::Internal::RPageSinkDaos, and ROOT::Experimental::Internal::RPageSinkFile.

◆ CommitClusterImpl()

virtual std::uint64_t ROOT::Experimental::Internal::RPagePersistentSink::CommitClusterImpl ( )

protectedpure virtual

Returns the number of bytes written to storage (excluding metadata)

Implemented in ROOT::Experimental::Internal::RPageSinkDaos, and ROOT::Experimental::Internal::RPageSinkFile.

◆ CommitDataset()

void ROOT::Experimental::Internal::RPagePersistentSink::CommitDataset ( )

finalvirtual

Finalize the current cluster and the entrire data set.

Implements ROOT::Experimental::Internal::RPageSink.

Definition at line 635 of file RPageStorage.cxx.

◆ CommitDatasetImpl()

virtual void ROOT::Experimental::Internal::RPagePersistentSink::CommitDatasetImpl	(	unsigned char *	serializedFooter,
		std::uint32_t	length
	)

protectedpure virtual

Implemented in ROOT::Experimental::Internal::RPageSinkDaos, and ROOT::Experimental::Internal::RPageSinkFile.

◆ CommitPage()

void ROOT::Experimental::Internal::RPagePersistentSink::CommitPage	(	ColumnHandle_t	columnHandle,
		const RPage &	page
	)

finalvirtual

Write a page to the storage. The column must have been added before.

Implements ROOT::Experimental::Internal::RPageSink.

Definition at line 522 of file RPageStorage.cxx.

◆ CommitPageImpl()

virtual RNTupleLocator ROOT::Experimental::Internal::RPagePersistentSink::CommitPageImpl	(	ColumnHandle_t	columnHandle,
		const RPage &	page
	)

protectedpure virtual

Implemented in ROOT::Experimental::Internal::RPageSinkDaos, and ROOT::Experimental::Internal::RPageSinkFile.

◆ CommitSealedPage()

void ROOT::Experimental::Internal::RPagePersistentSink::CommitSealedPage	(	DescriptorId_t	physicalColumnId,
		const RPageStorage::RSealedPage &	sealedPage
	)

finalvirtual

Write a preprocessed page to storage. The column must have been added before.

Implements ROOT::Experimental::Internal::RPageSink.

Definition at line 532 of file RPageStorage.cxx.

◆ CommitSealedPageImpl()

virtual RNTupleLocator ROOT::Experimental::Internal::RPagePersistentSink::CommitSealedPageImpl	(	DescriptorId_t	physicalColumnId,
		const RPageStorage::RSealedPage &	sealedPage
	)

protectedpure virtual

Implemented in ROOT::Experimental::Internal::RPageSinkDaos, and ROOT::Experimental::Internal::RPageSinkFile.

◆ CommitSealedPageV()

void ROOT::Experimental::Internal::RPagePersistentSink::CommitSealedPageV ( std::span< RPageStorage::RSealedPageGroup > ranges )

finalvirtual

Write a vector of preprocessed pages to storage. The corresponding columns must have been added before.

Implements ROOT::Experimental::Internal::RPageSink.

Definition at line 555 of file RPageStorage.cxx.

◆ CommitSealedPageVImpl()

std::vector< ROOT::Experimental::RNTupleLocator > ROOT::Experimental::Internal::RPagePersistentSink::CommitSealedPageVImpl ( std::span< RPageStorage::RSealedPageGroup > ranges )

protectedvirtual

Vector commit of preprocessed pages.

The ranges array specifies a range of sealed pages to be committed for each column. The returned vector contains, in order, the RNTupleLocator for each page on each range in ranges, i.e. the first N entries refer to the N pages in ranges[0], followed by M entries that refer to the M pages in ranges[1], etc. The default is to call CommitSealedPageImpl for each page; derived classes may provide an optimized implementation though.

Reimplemented in ROOT::Experimental::Internal::RPageSinkDaos, and ROOT::Experimental::Internal::RPageSinkFile.

Definition at line 544 of file RPageStorage.cxx.

◆ Create()

std::unique_ptr< ROOT::Experimental::Internal::RPageSink > ROOT::Experimental::Internal::RPagePersistentSink::Create	(	std::string_view	ntupleName,
		std::string_view	location,
		const RNTupleWriteOptions &	options = `RNTupleWriteOptions()`
	)

static

Guess the concrete derived page source from the location.

Definition at line 366 of file RPageStorage.cxx.

◆ EnableDefaultMetrics()

void ROOT::Experimental::Internal::RPagePersistentSink::EnableDefaultMetrics ( const std::string & prefix )

protected

Enables the default set of metrics provided by RPageSink.

prefix will be used as the prefix for the counters registered in the internal RNTupleMetrics object. This set of counters can be extended by a subclass by calling fMetrics.MakeCounter<...>().

A subclass using the default set of metrics is always responsible for updating the counters appropriately, e.g. fCounters->fNPageCommited.Inc()

Definition at line 646 of file RPageStorage.cxx.

◆ GetDescriptor()

const RNTupleDescriptor & ROOT::Experimental::Internal::RPagePersistentSink::GetDescriptor ( ) const

inlinefinalvirtual

Return the RNTupleDescriptor being constructed.

Implements ROOT::Experimental::Internal::RPageSink.

Definition at line 370 of file RPageStorage.hxx.

◆ InitFromDescriptor()

void ROOT::Experimental::Internal::RPagePersistentSink::InitFromDescriptor ( const RNTupleDescriptor & descriptor )

Initialize sink based on an existing descriptor and fill into the descriptor builder.

Definition at line 487 of file RPageStorage.cxx.

◆ InitImpl() [1/2]

void ROOT::Experimental::Internal::RPagePersistentSink::InitImpl ( RNTupleModel & model )

finalvirtual

Updates the descriptor and calls InitImpl() that handles the backend-specific details (file, DAOS, etc.)

Implements ROOT::Experimental::Internal::RPageSink.

Reimplemented in ROOT::Experimental::Internal::RPageSinkDaos, and ROOT::Experimental::Internal::RPageSinkFile.

Definition at line 462 of file RPageStorage.cxx.

◆ InitImpl() [2/2]

virtual void ROOT::Experimental::Internal::RPagePersistentSink::InitImpl	(	unsigned char *	serializedHeader,
		std::uint32_t	length
	)

protectedpure virtual

Implemented in ROOT::Experimental::Internal::RPageSinkDaos, ROOT::Experimental::Internal::RPageSinkFile, ROOT::Experimental::Internal::RPageSinkDaos, and ROOT::Experimental::Internal::RPageSinkFile.

◆ operator=() [1/2]

RPagePersistentSink & ROOT::Experimental::Internal::RPagePersistentSink::operator= ( const RPagePersistentSink & )

delete

◆ operator=() [2/2]

RPagePersistentSink & ROOT::Experimental::Internal::RPagePersistentSink::operator= ( RPagePersistentSink && )

default

◆ UpdateSchema()

void ROOT::Experimental::Internal::RPagePersistentSink::UpdateSchema	(	const RNTupleModelChangeset &	changeset,
		NTupleSize_t	firstEntry
	)

finalvirtual

Incorporate incremental changes to the model into the ntuple descriptor.

This happens, e.g. if new fields were added after the initial call to RPageSink::Init(RNTupleModel &). firstEntry specifies the global index for the first stored element in the added columns.

Implements ROOT::Experimental::Internal::RPageSink.

Definition at line 404 of file RPageStorage.cxx.

Member Data Documentation

◆ fCounters

std::unique_ptr<RCounters> ROOT::Experimental::Internal::RPagePersistentSink::fCounters

protected

Definition at line 326 of file RPageStorage.hxx.

◆ fDescriptorBuilder

Internal::RNTupleDescriptorBuilder ROOT::Experimental::Internal::RPagePersistentSink::fDescriptorBuilder

protected

Definition at line 314 of file RPageStorage.hxx.

◆ fNextClusterInGroup

std::uint64_t ROOT::Experimental::Internal::RPagePersistentSink::fNextClusterInGroup = 0

private

Remembers the starting cluster id for the next cluster group.

Definition at line 305 of file RPageStorage.hxx.

◆ fOpenColumnRanges

std::vector<RClusterDescriptor::RColumnRange> ROOT::Experimental::Internal::RPagePersistentSink::fOpenColumnRanges

private

Keeps track of the number of elements in the currently open cluster. Indexed by column id.

Definition at line 309 of file RPageStorage.hxx.

◆ fOpenPageRanges

std::vector<RClusterDescriptor::RPageRange> ROOT::Experimental::Internal::RPagePersistentSink::fOpenPageRanges

private

Keeps track of the written pages in the currently open cluster. Indexed by column id.

Definition at line 311 of file RPageStorage.hxx.

◆ fPrevClusterNEntries

NTupleSize_t ROOT::Experimental::Internal::RPagePersistentSink::fPrevClusterNEntries = 0

private

Used to calculate the number of entries in the current cluster.

Definition at line 307 of file RPageStorage.hxx.

◆ fSerializationContext

RNTupleSerializer::RContext ROOT::Experimental::Internal::RPagePersistentSink::fSerializationContext

private

Used to map the IDs of the descriptor to the physical IDs issued during header/footer serialization.

Definition at line 302 of file RPageStorage.hxx.

Libraries for ROOT::Experimental::Internal::RPagePersistentSink:

[legend]

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

tree/ntuple/v7/inc/ROOT/RPageStorage.hxx
tree/ntuple/v7/src/RPageStorage.cxx

Classes

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ RPagePersistentSink() [1/3]

◆ RPagePersistentSink() [2/3]

◆ RPagePersistentSink() [3/3]

◆ ~RPagePersistentSink()

Member Function Documentation

◆ AddColumn()

◆ CommitCluster()

◆ CommitClusterGroup()

◆ CommitClusterGroupImpl()

◆ CommitClusterImpl()

◆ CommitDataset()

◆ CommitDatasetImpl()

◆ CommitPage()

◆ CommitPageImpl()

◆ CommitSealedPage()

◆ CommitSealedPageImpl()

◆ CommitSealedPageV()

◆ CommitSealedPageVImpl()

◆ Create()

◆ EnableDefaultMetrics()

◆ GetDescriptor()

◆ InitFromDescriptor()

◆ InitImpl() [1/2]

◆ InitImpl() [2/2]

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ UpdateSchema()

Member Data Documentation

◆ fCounters

◆ fDescriptorBuilder

◆ fNextClusterInGroup

◆ fOpenColumnRanges

◆ fOpenPageRanges

◆ fPrevClusterNEntries

◆ fSerializationContext