Thanks for the clarification. I use
<config> <luceneMatchVersion>${lucene.version}</luceneMatchVersion> in the solrconfig.xml and pass -Dlucene.version when I launch solr, to keep the versions. > On Oct 12, 2017, at 11:01 PM, Erick Erickson <erickerick...@gmail.com> wrote: > > You can use the IndexUpgradeTool that ships with each version of Solr > (well, actually Lucene) to, well, upgrade your index. So you can use > the IndexUpgradeTool that ships with 5x to upgrade from 4x. And the > one that ships with 6x to upgrade from 5x. etc. > > That said, none of that is necessary _if_ you >> have the Lucene version in solrconfig.xml be the one that corresponds to >> your current Solr. I.e. a solrconfig for 6x should have a luceneMatchVersion >> of 6something. >> you update your index enough to rewrite all segments before moving to the >> _next_ version. When Lucene sees merges a segment, it writes the new segment >> according to the luceneMatchVersion in solrconfig.xml. So as long as you are >> on a version long enough for all segments to be merged into new segments, >> you don't have to worry. > > Best, > Erick > > On Thu, Oct 12, 2017 at 8:29 PM, Harry Yoo <hyunat...@gmail.com> wrote: >> I should have read this. My project has been running from apache solr 4.x, >> and moved to 5.x and recently migrated to 6.6.1. Do you think solr will take >> care of old version indexes as well? I wanted to make sure my indexes are >> updated with 6.x lucence version so that it will be supported when i move to >> solr 7.x >> >> Is there any best practice managing solr indexes? >> >> Harry >> >>> On Sep 22, 2015, at 8:21 PM, Walter Underwood <wun...@wunderwood.org> wrote: >>> >>> Don’t do anything. Solr will automatically clean up the deleted documents >>> for you. >>> >>> wunder >>> Walter Underwood >>> wun...@wunderwood.org >>> http://observer.wunderwood.org/ (my blog) >>> >>> >>>> On Sep 22, 2015, at 6:01 PM, CrazyDiamond <crazy_diam...@mail.ru> wrote: >>>> >>>> my index is updating frequently and i need to remove unused documents from >>>> index after update/reindex. >>>> Optimizaion is very expensive so what should i do? >>>> >>>> >>>> >>>> -- >>>> View this message in context: >>>> http://lucene.472066.n3.nabble.com/is-there-a-way-to-remove-deleted-documents-from-index-without-optimize-tp4230691.html >>>> Sent from the Solr - User mailing list archive at Nabble.com. >>> >>