Small correction here: you are able to "write" to a 3.x index using 4.0. It's just that the newly created segments will be written using the Lucene4x codec.
Mike McCandless http://blog.mikemccandless.com On Mon, Aug 27, 2012 at 2:35 PM, Stephen Howe <silentgun...@gmail.com> wrote: > Paul, > > So long as you are not writing to the 3.x index, it appears Lucene 4.0 can > read the indexes in a read only format. See Mike McCandle's blog post > http://blog.mikemccandless.com/2012/07/lucene-400-alpha-at-long-last.html > about > the alpha release codecs. As to whether or not that codec allows you to > leverage the Lucene 4.0 performance gains, I'll defer to someone wiser on > the subject. I would imagine it does, but I'm not sure. > > Sincerely, > Stephen > > On Wed, Aug 22, 2012 at 1:31 PM, Sitowitz, Paul <psitow...@verisign.com>wrote: > >> Hello, >> >> I have two products that are using Lucene: The first product creates the >> Lucene indexes for some data using Lucene version 3.01. The second product >> utilizes the indexes created by the first product for text search purposes >> and is also using Lucene 3.01. I understand that the latest version of >> Lucene 4.0 has made several performance enhancements of which we would like >> to be able to leverage by our second product. >> >> Question: If we upgrade the second product to use Lucene 4.0, will we >> still be able to take advantage of search related performance gains while >> still using the index created using Lucene 3.01 by our first product? OR, >> will we have to "bite the bullet" and upgrade BOTH products to use the >> latest version of Lucene? >> >> Thanks in advance for you response. >> >> Sincerely, >> >> Paul Sitowitz >> >> >> ________________________________ >> P a u l S i t o w i t z >> Core Engineering >> VeriSign Naming Services >> >> 12061 Bluemont Way >> Reston, VA 20190 >> >> psitow...@verisign.com (email) >> 703-948-3298 (office) >> 703-626-3593 (mobile) >> >> This message is intended for the use of the individual or entity to which >> it is addressed, and may contain information that is privileged, >> Confidential and exempt from disclosure under applicable law. Any >> unauthorized use, distribution, or disclosure is strictly prohibited. If >> you have received this message in error, please notify sender immediately >> and destroy/delete the original transmission >> >> --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
