Are the search statistics the same for the MultiReader? That is,
would a search on a MultiReader over several small indexes
necessarily return the same ranking as a single IndexReader on an
optimized reader? Would they return the same actual scores?
Just curious, I haven't tried MultiReader, but the code seems like it
should, at least based on my quick glance at it.
-Grant
On Dec 1, 2006, at 2:59 PM, Chris Hostetter wrote:
: I haven't tried it, but according to http://lucene.apache.org/java/
: docs/fileformats.html, each segment is a complete sub index. I
: _wonder_ if you couldn't manage your own merges by using
: IndexWriter.addIndexes() where you load each segment in separately
: (this may mean copying the segments to other directories, but I am
more specificly: opening an IndexReader on a an index with multiple
segments is functionally the same as opening a MultiReader on several
indexes with single segments.
so instead of having one index, and carefully controlling
maxMergeDocs,
you could manually create many small indexes, all of which you
continiously optimize (both to remove deletions, and to keep the
index at
a single segment) which you then explicly open a multi reader on.
-Hoss
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Grant Ingersoll
Center for Natural Language Processing
http://www.cnlp.org
Read the Lucene Java FAQ at http://wiki.apache.org/jakarta-lucene/
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