Amrit Sarkar created SOLR-11003:
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             Summary: Enabling bi-directional CDCR active-active clusters
                 Key: SOLR-11003
                 URL: https://issues.apache.org/jira/browse/SOLR-11003
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
          Components: CDCR
            Reporter: Amrit Sarkar


The latest version of Solr CDCR across cluster in active-passive format, where 
we can index into source cluster and the updates gets forwarded to the passive 
one and vice-versa is not supported.

https://lucene.apache.org/solr/guide/6_6/cross-data-center-replication-cdcr.html
https://issues.apache.org/jira/browse/SOLR-6273

We are try to get a  design ready to index in both clusters and the updates 
gets reflected across the clusters in real-time. ClusterA => ClusterB | 
ClusterB => ClusterA.

The best use-case would be to we keep indexing in ClusterA which forwarded the 
updates to ClusterB. If ClusterA gets down, we point the indexer and searcher 
application to ClusterB. Once ClusterA is up, depending updates count, they 
will be bootstrapped or forwarded to ClusterA from ClusterB.



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