ROOT::Experimental::RClusterGroupDescriptor Class Reference

Clusters are stored in cluster groups.

Cluster groups span all the columns of a certain event range.

Very large ntuples or combined ntuples (chains, friends) contain multiple cluster groups. The cluster groups may contain sharded clusters. However, a cluster group must contain the clusters spanning all the columns for the given event range. Cluster groups must partition the entry range of an ntuple. Every ntuple has at least one cluster group. The clusters in a cluster group are ordered corresponding to the order of page locations in the page list envelope that belongs to the cluster group (see format specification)

Definition at line 331 of file RNTupleDescriptor.hxx.

Public Member Functions
	RClusterGroupDescriptor ()=default
	RClusterGroupDescriptor (const RClusterGroupDescriptor &other)=delete
	RClusterGroupDescriptor (RClusterGroupDescriptor &&other)=default
RClusterGroupDescriptor	Clone () const
bool	Contains (DescriptorId_t clusterId) const
const std::vector< DescriptorId_t > &	GetClusterIds () const
DescriptorId_t	GetId () const
std::uint64_t	GetNClusters () const
std::uint32_t	GetPageListLength () const
RNTupleLocator	GetPageListLocator () const
RClusterGroupDescriptor &	operator= (const RClusterGroupDescriptor &other)=delete
RClusterGroupDescriptor &	operator= (RClusterGroupDescriptor &&other)=default
bool	operator== (const RClusterGroupDescriptor &other) const

Private Attributes
DescriptorId_t	fClusterGroupId = kInvalidDescriptorId
std::vector< DescriptorId_t >	fClusterIds
std::uint32_t	fPageListLength = 0
	Uncompressed size of the page list.
RNTupleLocator	fPageListLocator
	The page list that corresponds to the cluster group.

Friends
class	RClusterGroupDescriptorBuilder

#include <ROOT/RNTupleDescriptor.hxx>

Constructor & Destructor Documentation

RClusterGroupDescriptor() [1/3]

ROOT::Experimental::RClusterGroupDescriptor::RClusterGroupDescriptor ( )

default

RClusterGroupDescriptor() [2/3]

ROOT::Experimental::RClusterGroupDescriptor::RClusterGroupDescriptor ( const RClusterGroupDescriptor &  other )

delete

RClusterGroupDescriptor() [3/3]

ROOT::Experimental::RClusterGroupDescriptor::RClusterGroupDescriptor ( RClusterGroupDescriptor &&  other )

default

Member Function Documentation

Clone()

ROOT::Experimental::RClusterGroupDescriptor ROOT::Experimental::RClusterGroupDescriptor::Clone

(

)

const

Definition at line 387 of file RNTupleDescriptor.cxx.

Contains()

bool ROOT::Experimental::RClusterGroupDescriptor::Contains ( DescriptorId_t  clusterId ) const

inline

Definition at line 357 of file RNTupleDescriptor.hxx.

GetClusterIds()

const std::vector< DescriptorId_t > & ROOT::Experimental::RClusterGroupDescriptor::GetClusterIds ( ) const

inline

Definition at line 361 of file RNTupleDescriptor.hxx.

GetId()

DescriptorId_t ROOT::Experimental::RClusterGroupDescriptor::GetId ( ) const

inline

Definition at line 353 of file RNTupleDescriptor.hxx.

GetNClusters()

std::uint64_t ROOT::Experimental::RClusterGroupDescriptor::GetNClusters ( ) const

inline

Definition at line 354 of file RNTupleDescriptor.hxx.

GetPageListLength()

std::uint32_t ROOT::Experimental::RClusterGroupDescriptor::GetPageListLength ( ) const

inline

Definition at line 356 of file RNTupleDescriptor.hxx.

GetPageListLocator()

RNTupleLocator ROOT::Experimental::RClusterGroupDescriptor::GetPageListLocator ( ) const

inline

Definition at line 355 of file RNTupleDescriptor.hxx.

operator=() [1/2]

RClusterGroupDescriptor & ROOT::Experimental::RClusterGroupDescriptor::operator= ( const RClusterGroupDescriptor &  other )

delete

operator=() [2/2]

RClusterGroupDescriptor & ROOT::Experimental::RClusterGroupDescriptor::operator= ( RClusterGroupDescriptor &&  other )

default

operator==()

bool ROOT::Experimental::RClusterGroupDescriptor::operator==

(

const RClusterGroupDescriptor &

other

)

const

Definition at line 382 of file RNTupleDescriptor.cxx.

Friends And Related Symbol Documentation

RClusterGroupDescriptorBuilder

friend class RClusterGroupDescriptorBuilder

friend

Definition at line 332 of file RNTupleDescriptor.hxx.

Member Data Documentation

fClusterGroupId

DescriptorId_t ROOT::Experimental::RClusterGroupDescriptor::fClusterGroupId = kInvalidDescriptorId

private

Definition at line 335 of file RNTupleDescriptor.hxx.

fClusterIds

std::vector<DescriptorId_t> ROOT::Experimental::RClusterGroupDescriptor::fClusterIds

private

Definition at line 336 of file RNTupleDescriptor.hxx.

fPageListLength

std::uint32_t ROOT::Experimental::RClusterGroupDescriptor::fPageListLength = 0

private

Uncompressed size of the page list.

Definition at line 340 of file RNTupleDescriptor.hxx.

fPageListLocator

RNTupleLocator ROOT::Experimental::RClusterGroupDescriptor::fPageListLocator

private

The page list that corresponds to the cluster group.

Definition at line 338 of file RNTupleDescriptor.hxx.

Libraries for ROOT::Experimental::RClusterGroupDescriptor:

---

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

• tree/ntuple/v7/inc/ROOT/RNTupleDescriptor.hxx
• tree/ntuple/v7/src/RNTupleDescriptor.cxx