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From Mark Miller <>
Subject Re: Approximate release date for Lucene 2.9
Date Fri, 19 Dec 2008 04:57:59 GMT
Well look at the issues and see for yourself :)

Its a subjective call I think. Heres my take:

There are not going to be too many sweeping changes in the next release. 
There are tons of little bug fixes and improvements, but not a lot of 
the bullet point type stuff that you mention in your wishlist. Its a 
whole lot of little steps forward.

When it comes to sorting, there a couple possible goodies coming in the 
next release:

TrieRangeQuery has been added to contrib. Super awesome, super 
efficient, large scale sorting.

Work is ongoing to change searching semantics so that sorting is much 
faster in many cases. In fact, their may be search speed improvements 
across the board in many cases (don't quote me <g>). Sort fieldcache 
loading in the multi segment case will likely also be *blazingly* 
faster. Also, Filters and Fieldcaches may be pushed down to a single 
segment, making reopening sort fieldcaches *much* more efficient. Thats 
a nice step towards realtime.

RangeQuery, PrefixQuery and WildcardQuery will all have a constant score 
mode as well - this avoids maxclause limits and is often much faster on 
very large indexes.

Locallucene, a very cool bit of code that allows geo search, might make 
contrib for the next release.

Beyond that, there are a few more little gems, but its a lot of little 
fixes and improvements more than big features.

Column stride fields and flexible indexing will not be in the next 
release in my opinion, but a lot of progress towards flexible indexing 
has been made.

Keep in mind thats a biased view of the next release - I worked on two 
of those issues. Be sure to take it all with a healthy grain of salt.

- Mark

Ganesh wrote:
> Does Lucene 2.9 has real time search? Any improvements in sorting? Any 
> facility to store a payload per document (without updating document)?
> Please highlight the important feature?
> Regards
> Ganesh
> ----- Original Message ----- From: "Michael McCandless" 
> <>
> To: <>
> Sent: Friday, December 19, 2008 3:40 AM
> Subject: Re: Approximate release date for Lucene 2.9
>> Well... there are a couple threads on java-dev discussing this "now":
>> though they seem to have petered out.
>> Also we have 29 open issues for 2.9:

>> For 2.4 it took at least a month to whittle the list down to 0.
>> So it's hard to say?  I'd love to see 2.9 out earlyish next year though.
>> Mike
>> Kay Kay wrote:
>>> Hi -
>>> I am just curious - what is the approximate release target date 
>>> that  we have for Lucene 2.9 ( currently in beta in dev).
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