On May 18, 2006, at 5:22 PM, Günther Starnberger wrote:
On Thu, May 18, 2006 at 10:53:23PM +0200, Marcus Falck wrote:
Hello,
The term scorer will give higher score on documents containing both
terms. This is a problem (in our application) since in this case want
the same score on documents as long as they contain 1 of the terms
(since we are dealing with newsletter observation for companies they
want to get the hits ordered by date to get the complete
overview). I
tested to rewrite the TermScorer to give me the same score with
success. So my question is.
What exactly do you want to achieve with your application?
You speak of "immediate alerts". I understand this as: Your users
specify keywords or queries and when you receive a new document which
matches a query you alert the user.
Is this what you want to do? If so I don't think that Lucene is useful
for this kind of realtime queries. Instead of using an inverted index
it would make more sense to use a normal index which contains the
terms you search for. If you receive a new document make a lookup on
each term of the document using the index. It _might_ be possible to
do this with Lucene by storing the search-terms as documents and using
the documents which you receive as queries, but i guess this it isn't
that trivial.
If you need a combination of traditional search and real-time alerts a
hybrid solution may make sense. But using Lucene for real-time search
isn't a good idea (at least IMO).
Actually there is contrib/memory's MemoryIndex that is specifically
designed for this type of single document high performance querying.
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