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From "Michael McCandless" <>
Subject [VOTE] Commit LUCENE-843 (IndexWriter performance gains)
Date Mon, 02 Jul 2007 13:35:11 GMT

I'd like to commit LUCENE-843.

The patch has gone through a number of iterations but the final
version that's there now (take9) is quite a bit cleaner & simpler than
the ones leading up to it and I believe ready.

It provides solid indexing performance gains (between 2X-8X), but, it
is somewhat more complex than the current "single doc per segment"
approach and it does introduce a change to the index format (only when
autoCommit=false) whereby multiple segments can share a single set of
term vector & stored fields files.

Given that it's such a big change I think (?) it's appropriate to ask
for a vote (only PMC member votes are binding) to make sure we have
consensus that this is net/net a good change for Lucene.


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