SVN Head does.  Has not been released yet.      

See http://issues.apache.org/jira/browse/LUCENE-545
and
http://issues.apache.org/jira/browse/LUCENE-609

for some of the issues with it.

On Aug 11, 2006, at 8:19 AM, Dragon Fly wrote:

Mike, which version of Lucene supports lazy loading? Thanks.

From: Michael McCandless <[EMAIL PROTECTED]>
Reply-To: java-user@lucene.apache.org
To: java-user@lucene.apache.org
Subject: Re: Field compression too slow
Date: Fri, 11 Aug 2006 06:59:58 -0400


I can share the data.. but it would be quicker for you to just pull out some
random text from anywhere you like.

OK, I hear you.  I'll pull together some test data ... thanks.

Also.. upon reflection I'm not certain using compression inside the index is really a valuable process without lazy loading anyway. The time- cost of decompression when iterating hits reduces the overall effectiveness of the index. This is obviously solved by lazy loading (for searches) and I am
excited about this feature being added.  Obviously it depends on the
use-case, but in mine I realised that storing large amounts of data in the index is just not the right way to do things. So I changed my architecture so that the larger amounts of data are stored (and compressed) elsewhere,
then brought back in when I need to update a document.

Of course all my problems would be solved if I had lazy loading AND field
updating :)

Compleletely agreed! Lazy loading & specific field selection on loading a doc, have been addressed ... but field updating in the presence of compressed fields hasn't yet been addressed (I think). I'll raise this use case on the java-dev list.

Mike

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