Lucene 5.X version Index file format

Original link: https://my.oschina.net/rickylau/blog/527602

　　

Name	File Expansion Name	Describe
Segment file	Segments_n	Saves the number of segments that the index contains, and how many documents each segment contains.
Duan Yuancan Villager Data	, s+	Saved metadata information for an index segment
Lock file	Write.lock	Prevents multiple IndexWriter from being written to an index file at the same time.
Compound index File	. CFS,. CFE	Stores all index information in a composite index file.
Domain Information for index segments	. FNM	Save the domain that this segment contains, as well as the name of the domain and the index type of the domain.
Document information for an index segment	. FDX,. FDT	Save the documents contained in this section, the fields contained in each document, and the information for each domain.
Index segment Term Information	. Tim,. Tip	The. Tim file stores the statistics for the term in each domain and holds a pointer to the. doc,. Pos, and. Pay index files. The. Tip file holds the index information for the term dictionary and can support random access.
Term word frequency and skip table information in documents	. doc	Save the term frequency information for each document in this paragraph.
Position information for term in the document	. Pos	Save the term location information for each document in this paragraph.
Payload and partial location information for a document	. Pay	The location information (offsets) of the valid carrier (payload) and term for each document in this paragraph is saved. One part of the term location information is stored in the. pos file.
Index field weighting factor	. NVD,. NVM	. nvm files Save metadata for index field weighting factor . nvd File Save index field weighted data
Index document weighting Factor	. DVD,. DVM	. dvm files Save metadata for index document weighting factor . dvd File Save index document weighted data
Index vector data	. TVX,. TVD,. TVF	. TVD stores information such as term, term frequency, location information, payload, and so on for this document. The. TVX index file that is used to load specific documents into memory. . TVF Save the vector information for the indexed field.
Valid documents	. Liv	Save index file information for a valid document

Lucene 5.X version Index file format