[jira] [Created] (CASSANDRA-6495) LOCAL_SERIAL use QUORAM consistency level to validate expected columns

["sankalp kohli (JIRA)" <ji...@apache.org>]

sankalp kohli created CASSANDRA-6495:
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             Summary: LOCAL_SERIAL  use QUORAM consistency level to validate expected columns
                 Key: CASSANDRA-6495
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6495
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: sankalp kohli
            Priority: Minor


If CAS is done at LOCAL_SERIAL consistency level, only the nodes from the local data center should be involved. 
Here we are using QUORAM to validate the expected columns. This will require nodes from more than one DC. 
We should use LOCAL_QUORAM here when CAS is done at LOCAL_SERIAL. 

Also if we have 2 DCs with DC1:3,DC2:3, a single DC down will cause CAS to not work even for LOCAL_SERIAL. 





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