The tool docs can be found here: http://goo.gl/TbbxC
----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Uwe Schindler [mailto:u...@thetaphi.de] > Sent: Wednesday, July 18, 2012 11:13 AM > To: java-user@lucene.apache.org > Subject: RE: Lucene 2.x to 4.x upgrade possible? > > Hi, > > You have to first "convert" your indexes with version 3.x to migrate from 2.x to > 4.0. This can be done with the new tool called "IndexUpgrader" > (available since Lucene 3.2 or like that). You can call it from command line, it > will upgrade all index segments to the latest version you are using to call this > tool. You might want to ship your product with a Lucene 3.6.x lucene-core.jar > file just to call the IndexUpgrader tool. > > If you are starting development, I would now use Lucene 4.0-ALPHA. The final > version will come out when you finish your product. As the API changed > completely (2 times 2.x->3.x, 3.x->4.0) it's better to not do the work two times. > > Uwe > > ----- > Uwe Schindler > H.-H.-Meier-Allee 63, D-28213 Bremen > http://www.thetaphi.de > eMail: u...@thetaphi.de > > > > -----Original Message----- > > From: Nilesh Vijaywargiay [mailto:nilesh.vi...@gmail.com] > > Sent: Tuesday, July 17, 2012 11:14 PM > > To: java-user@lucene.apache.org > > Subject: Lucene 2.x to 4.x upgrade possible? > > > > Hi Folks, > > > > I need your help in determining whether we upgrade to 3.6 or wait till > > 4.0 becomes stable. > > > > We are currently using 2.x version of lucene and would like to upgrade > > to 3.6(and 4.0 ultimately). But we were informed by few blogs that 4.0 > > will > not be > > backward compatible which means that the our customers who currently > > have 2.x will not be able to upgrade to our latest release which would > > have > 4.0. > > > > Another blog mentioned that people using 2.x and looking upgrade to > > 4.0 should wait till 4.0 becomes stable. We are kind of confused with > contracting > > thoughts here. Does it mean that 4.0 ALPHA doesn't support backward > > compatibility and recommendation is to use 4.0 stable for backward > > compatiblity? > > > > Basically, to embark on process of upgrading lucene to 3.6(and 4.0 > > later) depends on whether customer having 2.x can upgrade to 4.0 or not. > > > > Thanks > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
