Tyler Hobbs created CASSANDRA-8085:
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             Summary: Make PasswordAuthenticator number of hashing rounds 
configurable
                 Key: CASSANDRA-8085
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8085
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Tyler Hobbs
            Assignee: Aleksey Yeschenko
             Fix For: 2.0.11, 2.1.1


Running 2^10 rounds of bcrypt can take a while.  In environments (like PHP) 
where connections are not typically long-lived, authenticating can add 
substantial overhead.  On IRC, one user saw the time to connect, authenticate, 
and execute a query jump from 5ms to 150ms with authentication enabled ([debug 
logs|http://pastebin.com/bSUufbr0]).

CASSANDRA-7715 is a more complete fix for this, but in the meantime (and even 
after 7715), this is a good option.



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