pointValue

pointValue

pointValue

pointValue

…

…

pointValue

pointValue

pointValue

pointValue

…

有序的点数据集合（维度数量：1）

Header

LeafNodeData

LeafNodeData

LeafNodeData

Footer

...

索引文件.kdd（Lucene 8.7.0）

u61_seg0 u61_seg1
u62_seg0 u62_seg1

leafNode

leafNode

leafNode

leafNode

leafNode

leafNode

leafNode

leafNode

innerNode

innerNode

innerNode

innerNode

innerNode

innerNode

根节点

u78_seg0
u79_seg0
u80_seg0
u81_seg0
u82_seg0
u83_seg0
u84_seg0
u85_seg0
u86_seg0
u87_seg0
u88_seg0
u89_seg0
u90_seg0
u91_seg0

BKD树

u93_seg0 u93_seg1
u94_seg0 u94_seg1