On the previous version of Solr (started from 8.9) a new incremental backup support has been added. It was based on the following proposal https://cwiki.apache.org/confluence/display/SOLR/SIP-12%3A+Incremental+Backup+and+Restore. JIRA issue https://issues.apache.org/jira/browse/SOLR-15086 for the SIP that was used for managing subtasks is closed with the comment that all the included proposals are being implemented. I see some updates on documentation for using incremental backup for SolrCloud, but what about Standalone Solr? Is there a reason why it is not announced that incremental support is also added for Standalone Solr? I don't see any mentions about incremental backup on Standalone Solr documentation. I've checked the sources and it seems that everything is in place and support is included (subissue https://issues.apache.org/jira/browse/SOLR-13608 was closed at version 8.9). Is it still not reliable and incremental backups have some issues? Or maybe just forgot to update documentation files?
Best regards, Artem Abeleshev
