When I had to move from differ solr 4.8.1to solr 7.3.1 I wrote this https://github.com/freedev/solr-import-export-json/
Still useful when you had to move from different versions of solr. And in general, pay attention to not export fields that are created with *copyField *Solr, in my experience this could lead to duplicate fields data during the import. On Thu, Jul 1, 2021 at 3:21 PM Eric Pugh <[email protected]> wrote: > https://github.com/o19s/solr_dump might help. Also investigate if > bin/solr export will work for you. > > > On Thu, Jul 1, 2021 at 8:48 AM Dominique Bejean <[email protected] > > > wrote: > > > Hi Prashanth, > > > > Please consider upgrading JDK to version 11. > > > > If all your fields are stored, maybe you can write a script in order to > > dump your data to json files and so reindex them in Solr 8. If your > indexes > > were created with Solr 7, you can try the IndexUpgraderTool > > https://solr.apache.org/guide/8_5/indexupgrader-tool.html. > > > > Dominique > > > > > > > > > > Le mer. 30 juin 2021 à 05:24, Prash Inc <[email protected]> a écrit : > > > > > Hi, > > > > > > 1. > > > I have apache solr 7.7.3 version. > > > > > > Want to upgrade to 8.5.2 version > > > > > > want to upgrade JDK to version 8 from 6 > > > > > > Please advise the steps for the same. > > > > > > 2. How to take backup of Solr data? > > > > > > 3. How to Export the entire data from version 7.7.3 to csv file ? > > > > > > 4. How to import that CSV file to upgraded 8.5.2 version ? > > > > > > > > > Thanks and Regards > > > Prashanth > > > +91-9686334920 > > > > > > -- Vincenzo D'Amore
