31 aug 2007 kl. 10.04 skrev Andrzej Bialecki:
Karl Wettin wrote:
30 aug 2007 kl. 22.50 skrev Andrzej Bialecki:
I think this is possible to achieve by using a FilterIndexReader,
which keeps a map of updated documents, and re-maps old doc ids
to the new ones on the fly.
From time to time I'd like to optimize the "aux" index to get rid
of deleted docs. At this time I need to figure out how to
preserve the old->new mapping during the optimization.
Perhaps my experiment in LUCENE-879 could be of interest.
Thanks for the pointer. As far as I understand the patch, this
doesn't help me, because I want to remap a newly added document so
that it appears to be at the old position. Eventually, when the
index becomes full of deletions, I want to optimize it, i.e. get
rid of dead weight completely.
Please correct me if I'm wrong, but your patch replaces deleted
documents with empty documents, which over time leads to an
unchecked growth of the index, which is hardly equivalent to
optimize() ... so, the main benefit I can see from your patch is
that it fixes the tf / idf to account for deleted docs.
The first patch does only that. The second patch will also, at
optimization, update a document without changing the document number.
--
karl
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