There is no meaning to the sequence. The segments are created concurrently by many threads and the merge process will merge them without regards to any ordering.
On Wed, May 3, 2023, 1:09 PM Patrick Zhai <zhai7...@gmail.com> wrote: > For that part I'm not entirely sure, if other folks know it please chime in > :) > > On Wed, May 3, 2023 at 8:48 AM Wei <weiwan...@gmail.com> wrote: > > > Thanks Patrick! In the default case when no LeafSorter is provided, are > the > > segments traversed in the order of creation time, i.e. the oldest segment > > is always visited first? > > > > Wei > > > > On Tue, May 2, 2023 at 7:22 PM Patrick Zhai <zhai7...@gmail.com> wrote: > > > > > Hi Wei, > > > Lucene in general iterate through the index in the order of what is > > > recorded in the SegmentInfos > > > < > > > > > > https://github.com/apache/lucene/blob/main/lucene/core/src/java/org/apache/lucene/index/SegmentInfos.java#L140 > > > > > > > And at search time, you can specify the order using LeafSorter > > > < > > > > > > https://github.com/apache/lucene/blob/main/lucene/core/src/java/org/apache/lucene/index/DirectoryReader.java#L75 > > > > > > > when you're opening the IndexReader > > > > > > Patrick > > > > > > On Tue, May 2, 2023 at 5:28 PM Wei <weiwan...@gmail.com> wrote: > > > > > > > Hello, > > > > > > > > We have a index that has multiple segments generated with continuous > > > > updates. Does Lucene have a specific order when iterate through the > > > > segments (assuming single query thread) ? Can the order be customized > > > that > > > > the latest generated segments are searched first? > > > > > > > > Thanks, > > > > Wei > > > > > > > > > >
