Depends.
0) optimize big index
1) on big index delete all documents except those for a part of index
2) use AddIndexes on IndexWriter on destination dir (empty)
3) delete segments.del in big index directory (the segments.del is a
just serialized BitVector)
4) repeat for another set
do not make optimize or any other action if segments.del lives- that
will delete your documents
I searched the mail list archives for an answer to that question;
The closest (and perhaps the only) thread in this regard that I found is:
http://www.gossamer-threads.com/lists/lucene/java-user/9928
So the answer was "No", but this is way back in the mid 2004 (2 years
ago).
Is there a solution to that problem now?
Stanislav
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