Class Lucene90PointsFormat

java.lang.Object
org.apache.lucene.codecs.PointsFormat
org.apache.lucene.codecs.lucene90.Lucene90PointsFormat

public final class Lucene90PointsFormat extends PointsFormat
Lucene 9.0 point format, which encodes dimensional values in a block KD-tree structure for fast 1D range and N dimensional shape intersection filtering. See this paper for details.

Data is stored across three files

  • A .kdm file that records metadata about the fields, such as numbers of dimensions or numbers of bytes per dimension.
  • A .kdi file that stores inner nodes of the tree.
  • A .kdd file that stores leaf nodes, where most of the data lives.
See this wiki for detailed data structures of the three files.