Jack,
To demonstrate this, I had set up a simple test, measuring the impact of
search quality (Mean Average Precision) against % of an index filtered. The
test was setup by taking the TREC 2004 collection, breaking that up into
several smaller chunks of increasing size, then measured the MAP of th
The very definition of a "filter" in Lucene is that it doesn't influence
relevance/scoring in any way, so your question is a contradiction in terms.
If you are finding that the use of a filter is affecting the scores of
documents, then that is clearly a bug.
-- Jack Krupansky
-Original M
