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From Michael McCandless <luc...@mikemccandless.com>
Subject Re: Lucene File Formats web page
Date Fri, 01 Feb 2008 19:36:21 GMT

Woops, you are correct, the file formats doc is out of date.

It should be #1.

I'll fix it -- thank you for raising it!

Mike

Ivan Vasilev wrote:

> Hi Guys,
>
> In the File Formats web page (http://lucene.apache.org/java/2_3_0/ 
> fileformats.html) there is section describing Segments File, where  
> we read:
>
> Segments --> Format, Version, NameCounter, ...
> ...
> Format is -1 as of Lucene 1.4 and -3  
> (SemgentInfos.FORMAT_SINGLE_NORM_FILE) as of Lucene 2.1.
> ...
>
> On my opinion the last sentence is not completely right. I mean it  
> should contain addition somthing like this:
> 1) "and -4 (SemgentInfos.FORMAT_SHARED_DOC_STORE) as of Lucene 2.3."
> or like this:
> 2) "and as of Lucene 2.3 -4 (SemgentInfos.FORMAT_SHARED_DOC_STORE)  
> in cases when shared stored fields and term vectors exist or -3  
> (SemgentInfos.FORMAT_SINGLE_NORM_FILE) when no sharing exists."
>
> So my question is what of the two suggestions is correct?
> According to my tests with our IndexRecoverer tool the 1) is  
> correct. Here I will have to mention what does this tool. It  
> creates segments file out of given set of segments. I did not made  
> a lot of tests yet but in one single case when I created segments  
> file for a segments set that does not contain any shared data when  
> I use Format=SemgentInfos.FORMAT_SINGLE_NORM_FILE Luke can not open  
> it using Lucene 2.3, but when  
> Format=SemgentInfos.FORMAT_SHARED_DOC_STORE it opens it correctly.
>
> Best Regards,
> Ivan
>
>
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