Package org.apache.lucene.util.hnsw

Class ConcurrentHnswMerger

java.lang.Object

org.apache.lucene.util.hnsw.IncrementalHnswGraphMerger

org.apache.lucene.util.hnsw.ConcurrentHnswMerger

All Implemented Interfaces:

HnswGraphMerger

public class ConcurrentHnswMerger
extends IncrementalHnswGraphMerger

This merger merges graph in a concurrent manner, by using HnswConcurrentMergeBuilder

Field Summary

Fields inherited from class org.apache.lucene.util.hnsw.IncrementalHnswGraphMerger

beamWidth, fieldInfo, initDocMap, initGraphSize, initReader, M, scorerSupplier

Constructor Summary

Constructors

Constructor	Description
ConcurrentHnswMerger(FieldInfo fieldInfo, RandomVectorScorerSupplier scorerSupplier, int M, int beamWidth, TaskExecutor taskExecutor, int numWorker)

Method Summary

Modifier and Type	Method	Description
protected HnswBuilder	createBuilder(DocIdSetIterator mergedVectorIterator, int maxOrd)	Builds a new HnswGraphBuilder using the biggest graph from the merge state as a starting point.

Methods inherited from class org.apache.lucene.util.hnsw.IncrementalHnswGraphMerger

addReader, getNewOrdMapping, merge

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ConcurrentHnswMerger

public ConcurrentHnswMerger(FieldInfo fieldInfo,
                            RandomVectorScorerSupplier scorerSupplier,
                            int M,
                            int beamWidth,
                            TaskExecutor taskExecutor,
                            int numWorker)

Parameters:

fieldInfo - FieldInfo for the field being merged

Method Detail

createBuilder

protected HnswBuilder createBuilder(DocIdSetIterator mergedVectorIterator,
                                    int maxOrd)
                             throws IOException

Description copied from class: IncrementalHnswGraphMerger

Builds a new HnswGraphBuilder using the biggest graph from the merge state as a starting point. If no valid readers were added to the merge state, a new graph is created.

Overrides:

createBuilder in class IncrementalHnswGraphMerger

Parameters:

mergedVectorIterator - iterator over the vectors in the merged segment

maxOrd - max num of vectors that will be merged into the graph

Returns:

HnswGraphBuilder

Throws:

IOException - If an error occurs while reading from the merge state