Bhuvan Rawal created CASSANDRA-12663:

             Summary: Allowing per DC segregation of schema, allowing user to 
create different indices per datacenter on tables
                 Key: CASSANDRA-12663
             Project: Cassandra
          Issue Type: New Feature
          Components: Core
            Reporter: Bhuvan Rawal

For analytics & auditing purposes it becomes essential to serve different 
access patterns than that modeled from a partition key fetch perspective, 
although a limited reads are needed by users but if enabled cluster wide it 
will require index write for every row written on that table on every single 
node on every DC even the one which may be serving read operations. A user may 
not want to have indices built on Transactional DC on every write, that 
computation and disk utilization may not be useful as the Analytics may 
possibly be performed on other DC.

It will be a plus to have analytics / auditing workload built inside Cassandra 
itself using native secondary indices / SASI indices / Stratio by creating 
indices for a specific datacenter and not having to ship off data to other 
index stores like Elasticsearch through application.

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