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From Anshum <>
Subject Re: Index maintaining/updating
Date Tue, 10 Nov 2009 07:35:38 GMT
Hi Wenhao,
Its generally better to incrementally buld your index and at the same
Considering by this time you'd be a little aware of implementing/using
luceneAPI, here is what you could do.
Open the existing index using 'createnew' set to false

*IndexWriter(Directory d, Analyzer a, boolean create) *
*This way, the indexwriter would append the new documents to the existing
index (as specified in the IndexWriter constructor).*
*This way you could incrementally build the index.*
*Also note, you may wish to optimize the index at times.*
*Hope this solves your issue (and doubt).*
Anshum Gupta
Naukri Labs!

The facts expressed here belong to everybody, the opinions to me. The
distinction is yours to draw............

On Tue, Nov 10, 2009 at 12:09 PM, Wenhao Xu <> wrote:

> Hi, everybody,
>   I am new to Lucene and have a question about how to update my index. The
> following is my situation:
>   1) I create indexes for each text (or varchar) field of a relational
> database;
>   2) This database will be continuously inserted into by new records; and I
> need to add indexes of these new records to the index;
>   So therefore, I just need to incrementally update my index. Should I
> delete the original index an rebuild a new one? Or just update the new one?
> Which method is better for my situation?
>    I searched google, but I did not get a good answer. So I posted the
> question here. Looking forward to your reply.
> Thanks,
> W.
> --
> ~_~

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