Jason Gerlowski created SOLR-15087:
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             Summary: Allow backup restoration to existing collections
                 Key: SOLR-15087
                 URL: https://issues.apache.org/jira/browse/SOLR-15087
             Project: Solr
          Issue Type: Sub-task
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Jason Gerlowski


The "read-only" mode introduced by SOLR-13721 opens the door to our restoring 
backup snapshots to already-existing collections.
# Set read-only mode for the collection in question.
# Restore a backup to each shard
# Unset read-only mode for the collection.

See 
[SIP-12|https://cwiki.apache.org/confluence/display/SOLR/SIP-12%3A+Incremental+Backup+and+Restore]
 and the corresponding [discussion 
thread|http://mail-archives.apache.org/mod_mbox/lucene-dev/202012.mbox/%3cCAPCX2-LRxHMs55Mx249sSYLPWT-vb-fi=hifroa12wiwlis...@mail.gmail.com%3e]
 for more details.



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