SegName

SegID

SegCodec

DelGen

DeletionCount

FieldInfosGen

DocValuesGen

SoftDelCount

FieldInfosFiles

UpdatesFiles

Header

LuceneVersion

IndexCreatedVersionMajor

Version

NameCounter

SegCount

MinSegmentLuceneVersion

SegmentCommitInfo

SegmentCommitInfo

CommitUserData

Footer

... ...

索引文件之Segment_N(Lucene 7.5.0)