Sure - read all the release notes, migration guides, everything, test and test again.
-- Ian. On Tue, Nov 20, 2012 at 10:24 AM, Danil ŢORIN <torin...@gmail.com> wrote: > However behavior of some analyzers changed. > > So even after upgrade the old index is readable with 4.0, it doesn't mean > everything still works as before. > > On Tue, Nov 20, 2012 at 12:20 PM, Ian Lea <ian....@gmail.com> wrote: > > > You can upgrade the indexes with org.apache.lucene.index.IndexUpgrader. > > You'll need to do it in steps, from 2.x to 3.x to 4.x, but should work > > fine as far as I know. > > > > > > -- > > Ian. > > > > > > > > On Tue, Nov 20, 2012 at 10:16 AM, Ramprakash Ramamoorthy < > > youngestachie...@gmail.com> wrote: > > > > > I understand lucene 2.x indexes are not compatible with the latest > > version > > > of lucene 4.0. However we have all our indexes indexed with lucene 2.3. > > > > > > Now that we are planning to migrate to Lucene 4.0, is there any work > > > around/hack I can do, so that I can still read the 2.3 indices? Or is > > > forgoing the older indices the only option? > > > > > > P.S : Am afraid, Re-indexing is not feasible. > > > > > > -- > > > With Thanks and Regards, > > > Ramprakash Ramamoorthy, > > > Chennai, > > > India. > > > > > >
