On Aug 3, 2007, at 9:47 AM, tierecke wrote:
Hi,
Can I know in how many documents a term appears (DF - Document
Frequency)?
Does Lucene keep it? Can I retrieve it?
See the TermEnum class (IndexReader.terms()
Now - an even more advanced question:
Since I have a 77GB index, I cut it into 25 smaller indices of 3GB
each and
I query them using MultiSearcher. Is there a possibility to know
the DF of a
term throughout the whole collection or do I need to ask each index
for the
DF of a specific term (supposing that my first question is solvable).
See the MultiReader and MultiReader.terms()
And the last question: Is there a way to know the total number of
documents
in a Lucene Index? Is there a way to know the total number of
documents in
multiple indexes together?
IndexReader.numDocs()
MultiReader.numDocs()
I hope it's not too much. Suddenly I find myself dealing with stuff
I never
dealt before.
Much better than doing the same stuff day after day for life, ain't
it? :-)
--------------------------
Grant Ingersoll
http://lucene.grantingersoll.com
Lucene Helpful Hints:
http://wiki.apache.org/lucene-java/BasicsOfPerformance
http://wiki.apache.org/lucene-java/LuceneFAQ
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