thank you.
so if I want to use new compress/decompress algorithm, I must use
lucene 4.0 in svn? Is there any patch for old release such as
2.9?because I need solr 1.4 which based on lucene 2.9
2010/11/8 Simon Willnauer <[email protected]>:
> Li Li,
>
> there is no official / unofficial release date for lucene 4.0 if you
> want to use the latest and greatest features you need to checkout
> trunk of use a nightly build. My guess would be that there is at least
> 6 to 8 month to the next release but I can be wrong (more likely it
> might take even longer) .
>
> For PFoR etc you should look into:
> https://issues.apache.org/jira/browse/LUCENE-1410
> https://issues.apache.org/jira/browse/LUCENE-2723
>
> to get started - and read mikes blog
> http://chbits.blogspot.com/2010/08/lucene-performance-with-pfordelta-codec.html
>
> There is also S9
> https://issues.apache.org/jira/browse/LUCENE-2189
> and GroupVInt impls
> https://issues.apache.org/jira/browse/LUCENE-2735
>
> simon
>
> On Mon, Nov 8, 2010 at 4:59 AM, Li Li <[email protected]> wrote:
>> hi all,
>> When will lucene 4.0 be released?
>> I want to replace VInt compression with fast ones such as
>> PForDelta. In my application, decompressing a docList of 10M will use
>> about 300ms. In "Performance of Compressed Inverted List Caching in
>> Search Engines. With J. Zhang and X.Long. 17th International World
>> Wide Web Conference (WWW), April 2008." , the author says PForDelta is
>> much faster than VInt. And I also found a java implementation in
>> http://code.google.com/p/integer-array-compress-kit/ it's speed is 500
>> (M int / sec). But to achieve, I have to modify index file format. And
>> I found http://wiki.apache.org/lucene-java/FlexibleIndexing in lucene
>> 4.0, it will support fore flexible index format. I want to know when
>> it will be released so as to decide whether wait it or doing it
>> myself. Thank you.
>>
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