Namespace Lucene.Net.Index

Misc index tools and index support.

Classes

CompoundFileExtractor

Command-line tool for extracting sub-files out of a compound file.

IndexSplitter

Command-line tool that enables listing segments in an index, copying specific segments to another index, and deleting segments from an index.

This tool does file-level copying of segments files. This means it's unable to split apart a single segment into multiple segments. For example if your index is a single segment, this tool won't help. Also, it does basic file-level copying (using simple Stream) so it will not work with non FSDirectory Directory impls.

@lucene.experimental You can easily accidentally remove segments from your index so be careful!

MultiPassIndexSplitter

This tool splits input index into multiple equal parts. The method employed here uses AddIndexes(IndexReader[]) where the input data comes from the input index with artificially applied deletes to the document id-s that fall outside the selected partition.

Note 1: Deletes are only applied to a buffered list of deleted docs and don't affect the source index - this tool works also with read-only indexes.

Note 2: the disadvantage of this tool is that source index needs to be read as many times as there are parts to be created, hence the name of this tool.

NOTE: this tool is unaware of documents added atomically via or , which means it can easily break up such document groups.

PKIndexSplitter

Split an index based on a Filter.