The following files are originally created files (upon an initial indexing):
_0.fdt
_0.fdx
_0.fnm
_0.si
_0_Lucene40_0.frq
_0_Lucene40_0.prx
_0_Lucene40_0.tim
_0_Lucene40_0.tip
_0_nrm.cfe
_0_nrm.cfs
index.v0008
segments.gen
segments_1
But when I added a new document, in one case, I got several other files that
got generated apart from the above:
_0.fdt
_0.fdx
_0.fnm
_0.si
_0_Lucene40_0.frq
_0_Lucene40_0.prx
_0_Lucene40_0.tim
_0_Lucene40_0.tip
_0_nrm.cfe
_0_nrm.cfs
* _2.fdx // what is the significance of
these _2 prefix files.
_2.fnm
_2.si
_2_Lucene40_0.frq
_2_Lucene40_0.prx
_2_Lucene40_0.tim
_2_Lucene40_0.tip
_2_nrm.cfe
_2_nrm.cfs*
segments_3
Sometimes, it does create the _2 prefix files apart from incrementing the
segement_<N> version. Could anyone please let me know why those files (_2
prefix files are there in the index directory) are generated in the first
place and its importance/significance.
I haven't seen it generated for other updates hence would like to understand
the concept behind.
Thanks,
Sai.
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