[Xapian-devel] chert vs flint vs lucene

[towel moist]

Hi,

What's the main difference between chert and flint?  What above vs lucene?

I am mainly asking about data structure (lexicon, posting list, document
data), what's in memory, what's on disk, hash vs b-tree and reasons behind
them.

Any pointer is appreciated.

Thanks!
Crystal
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