I'd go with 6.6.
Technically you do not have to re-index, although if you can it's
preferable. Solr (well, mostly Lucene) will allow reading "one major
version back", so any 6x Solr should work fine with a 5x index. As the
segments get merged, they'll be brought up to the 6x format. There's
also t
Hi,
We are currently running Solr 5.1 in production. We do not use SolrCloud now
. We plan to move to 6.x and use SolrCloud. Any specific recommendations on the
recommended Solr 6.x version to use in prod. We are open to reindex all the
collections during this migration. Outr major use is ful
