--- Michael Steiger <[EMAIL PROTECTED]> wrote:
Hello Lucene Users,
I have a web application using Oracle as the database and I want to
add fulltext query capablities. My idea was to extend the existing
insert, update and delete methods of my backend classes to add, delete/add
and delete respectively.
I'm new to Lucene and after a bit of googling and reading I found a
few issues which I do not know how to resolve in the moment.
1. Concurrency of IndexWriter and IndexReader
It seems that it is not allowed to open an IndexWriter and an IndexReader at the same time. But if one user is changing records in
the database (and therefore changing documents in the Lucene index) and another user is querying the index, I would need to open them both.
This problem should be easily solvable through synchronizing on an object that is used as a shared lock.
Misunderstanding solved due another response. Should be no problem anymore.
2. Optimizing the index
This is maybe related to my first issue.
I assume that while optimizing the index no queries are allowed. How often should the index be optimized?
Queries are allowed while an index is being optimized. You can optimize as often as you'd like, but the recommended approach is to optimize only when you know your index won't change for a while, or if you are running out of file descriptors.
This is covered in at least one of the Lucene articles (links on the site).
Otis, thanks for your help Michael
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