Cassandra change replication factor hive datastore
By Default cql will convert the table/keyspace/column name in lowercase.
If you have table/keyspace/column in uppercase you have to enclose it in double quotes.

alter KEYSPACE "HiveMetaStore" with replication = 
    {'class': 'NetworkTopologyStrategy', 'DCassandra1': 1};


Opscenter handled it for you:)

CQL UpperCase/lowercase