I recommend checking what has changed between the versions and ensuring that all the configs used are still valid and supported. I would also carefully change the constants such as the Lucene match version (https://sease.io/2021/04/lucenematchversion-in-apache-solr.html). So, in short, there's no need to start from the new default, but also I strongly don't recommend copying and pasting the old solrconfig.xml and schema because stuff may not work as expected or something could silently stop working.
Cheers -------------------------- *Alessandro Benedetti* Director @ Sease Ltd. *Apache Lucene/Solr Committer* *Apache Solr PMC Member* e-mail: [email protected] *Sease* - Information Retrieval Applied Consulting | Training | Open Source Website: Sease.io <http://sease.io/> LinkedIn <https://linkedin.com/company/sease-ltd> | Twitter <https://twitter.com/seaseltd> | Youtube <https://www.youtube.com/channel/UCDx86ZKLYNpI3gzMercM7BQ> | Github <https://github.com/seaseltd> On Wed, 13 Mar 2024 at 18:21, Shawn Heisey <[email protected]> wrote: > On 3/13/24 03:06, Isabella Trevisan wrote: > > Hi , > > I am plannig to migrate from solr 8.11.3 to 9.5.0 in solrcloud > > architecture. > > > > The idea is to create a new line of solrcloud 9.5 where to create the > > collections present in solrcloud 8.11.3 and reindex all the content on > the > > new platform. > > My doubt is about the config with which to create the collections in > > solr9.5. > > Can I keep the config present in solr 8.11.3 or do I necessarily have to > > adopt the new one present in the default configs and report in this what > we > > defined in solr8.11.3? > > I assume here that you are talking about solrconfig.xml and the schema. > > Without seeing the config, it's difficult to answer that question. If > the config is not using anything that is deprecated in 8.11.3, it SHOULD > work just fine in 9.x. Anything that is deprecated in 8.x will be > removed in 9.x. > > Thanks, > Shawn > >
