bq. You will have to migrate your indexes from 4 to 5, then 5 to 6, and finally 6 to 7. This actually has never been guaranteed. Lucene has guaranteed back-compat for 1 major version. Using the IndexUpgrader tool will rewrite the X-1 format in version X format, but cannot synthesize data from
About the migration strategy, you may have to choose between reindexing all the data or migrating your current indexes. the IndexUpgrader tool will be able to handle that. You will have to migrate your indexes from 4 to 5, then 5 to 6, and finally 6 to 7.
The Solr Ref Guide also has extensive sections (particularly for upgrading to Solr 6 and 7) describing summarizing major changes for various releases. Start at https://lucene.apache.org/solr/guide/solr-upgrade-notes.html and note the child pages from there. Cassandra On Dec 11, 2018, 10:30 AM
The CHANGES.txt file in both the Solr and Lucene directories have a section listing the differences between every Solr version, major and minor that you could review. The reference guide has an upgrade section as well that will be informative. That said, there are many changes. Lot and lots and
Bonjour , I am a project manager at La Poste française , I am managing a national project using SORL 4.9 and I want to migrate to SOLR 7 . Can you give me a summary of all the spots that need to be done to make this migration? Thank oyu your for help Fred