I think running the upgrade tool would also be necessary to set you up for the next upgrade, when 9.0 comes along.
On Fri, Nov 20, 2020, 4:25 AM Uwe Schindler <u...@thetaphi.de> wrote: > Hi, > > > Currently I am using Lucene 7.3, I want to upgrade to lucene 8.5.1. > Should > > I do reindexing in this case ? > > No, you don't need that. > > > Can I make use of backward codec jar without a reindex? > > Yes, just add the JAR file to your classpath and it can read the indexes. > Updates written to the index will use the new codecs. To force a full > upgrade (rewrite all segments), invoke the IndexUpgrader class either from > your code or using the command line. But this is not needed, it just makes > sure that you can get rid of the backwards-codecs jar. > > Uwe > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
