Strategy that assigns chunks to be read by processes within the same host that produced the chunk. More...

Inheritance diagram for openPMD::chunk_assignment::ByHostname:

Public Member Functions
	ByHostname (std::unique_ptr< Strategy > withinNode)

PartialAssignment	assign (PartialAssignment, RankMeta const &in, RankMeta const &out, size_t my_rank, size_t num_ranks) override
	Assign chunks to be loaded to reading processes.

virtual std::unique_ptr< PartialStrategy >	clone () const override

Public Member Functions inherited from openPMD::chunk_assignment::PartialStrategy
PartialAssignment	assign (ChunkTable table, RankMeta const &in, RankMeta const &out, size_t my_rank, size_t num_ranks)
	Assign chunks to be loaded to reading processes.

Detailed Description

Strategy that assigns chunks to be read by processes within the same host that produced the chunk.

The distribution strategy within one such chunk can be flexibly chosen.

Member Function Documentation

PartialAssignment openPMD::chunk_assignment::ByHostname::assign	(	PartialAssignment	partialAssignment,
		RankMeta const &	in,
		RankMeta const &	out,
		size_t	my_rank,
		size_t	num_ranks )

overridevirtual

Assign chunks to be loaded to reading processes.

To be defined by implementors.

Parameters

partialAssignment	Two chunktables, one of unassigned chunks and one of chunks that might have already been assigned previously. Merge the unassigned chunks into the partially assigned table.
in	Meta information on writing processes, e.g. hostnames.
out	Meta information on reading processes, e.g. hostnames.
my_rank	Rank identifier for the current process. Will be considered by some distribution strategies that may be called for only a subselection of the data space (e.g. for distributing data within processes on the same compute node in a cluster).
num_ranks	Number of processes among which chunks are to be distributed. Will be considered by some distribution strategies that may be called for only a subselection of the data space (e.g. for distributing data within processes on the same compute node in a cluster).

Returns: Two chunktables, one of leftover chunks that were not assigned and one that assigns chunks to reading processes. Assigned chunks are sorted by the destination process ID (MPI rank). Distribution strategies will in general only need to fill the chunks for the current (calling) process ID. Chunks assigned to another destination processes may be silently dropped.

std::unique_ptr< PartialStrategy > openPMD::chunk_assignment::ByHostname::clone ( ) const

overridevirtual

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