Package org.apache.lucene.util.hnsw

Interface HnswGraphMerger

All Known Implementing Classes:

ConcurrentHnswMerger, IncrementalHnswGraphMerger

public interface HnswGraphMerger

Abstraction of merging multiple graphs into one on-heap graph

WARNING: This API is experimental and might change in incompatible ways in the next release.

Method Summary

Modifier and Type	Method	Description
HnswGraphMerger	addReader(KnnVectorsReader reader, MergeState.DocMap docMap, Bits liveDocs)	Adds a reader to the graph merger to record the state
OnHeapHnswGraph	merge(DocIdSetIterator mergedVectorIterator, InfoStream infoStream, int maxOrd)	Merge and produce the on heap graph

Method Details

addReader

HnswGraphMerger addReader(KnnVectorsReader reader,
 MergeState.DocMap docMap,
 Bits liveDocs)
                   throws IOException

Adds a reader to the graph merger to record the state

Parameters:

reader - KnnVectorsReader to add to the merger

docMap - MergeState.DocMap for the reader

liveDocs - Bits representing live docs, can be null

Returns:

this

Throws:

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

merge

OnHeapHnswGraph merge(DocIdSetIterator mergedVectorIterator,
 InfoStream infoStream,
 int maxOrd)
               throws IOException

Merge and produce the on heap graph

Parameters:

mergedVectorIterator - iterator over the vectors in the merged segment

infoStream - optional info stream to set to builder

maxOrd - max number of vectors that will be added to the graph

Returns:

merged graph

Throws:

IOException - during merge