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 > >
