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From Otis Gospodnetic <otis_gospodne...@yahoo.com>
Subject RE: Stress/scalability testing Lucene
Date Wed, 20 Nov 2002 22:16:14 GMT
Reding and writing at the same time is okay.  Only one thread can
modify the index at a time.

Otis

--- roy-lucene-user@xemaps.com wrote:
> Ah, for some reason i thought none of the Lucene methods were thread
> safe,
> or is this only in the case of reading and writing at the same time? 
> I
> thought I read this in the FAQ.
> 
> Roy.
> 
> -----Original Message-----
> From: Doug Cutting [mailto:cutting@lucene.com]
> Sent: Wednesday, November 20, 2002 5:04 PM
> To: Lucene Users List
> Subject: Re: Stress/scalability testing Lucene
> 
> 
> * Replies will be sent through Spamex to
> lucene-user@jakarta.apache.org
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> 
> Justin Greene wrote:
> > We created a thread pool to read and parse the email
> > messages.  10 threads seems to be the magic number here for us.  We
> then
> > created a queue of messages to be indexed onto which we push the
> parsed
> > messages and have a single thread adding messages to the index.
> 
> IndexWriter.addDocument(Document) is thread safe, so you don't need a
> 
> separate indexing thread.  So long as your analyzer is thread safe,
> you 
> can index each messages in the thread that parses it, for even
> greater 
> parallelism.
> 
> Doug
> 
> 
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