Also, is it worth considering a couple of things:

1. Do a build version release prior to committing (i.e. 2.2.1) that way we could isolate this change and do a separate release to 2.3. I don't want to do releases just for the sake of releases, but I think we should at least prepare people that the next release (i.e. the one containing 843) has a significant change. I don't think this patch warrants a major revision tick, but it does make sense to have people really scrutinize it and to have them know that there are significant gains to be had.

2. or, at a minimum, do a tag of the trunk right before committing. I just find explicit tags make it easier to rollback or compare diffs if need be

Note these suggestions are by no means a judgment of the quality of the patch, just some precautions before such a big change.

-Grant

On Jul 2, 2007, at 1:31 PM, Grant Ingersoll wrote:


On Jul 2, 2007, at 9:35 AM, Michael McCandless wrote:

Hi,

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.


+0 for now, I will try to review tonight or tomorrow night. From what I gather from reading the issue, etc. it sounds great and you and others have put a lot of hard work into it. Also, from some benchmarking I have done, it seems to sit well with the notion of optimizing merge factor, etc. based on the amount of memory available.


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