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Posted to commits@cassandra.apache.org by "Carl Yeksigian (JIRA)" <ji...@apache.org> on 2016/07/20 18:49:20 UTC

[jira] [Created] (CASSANDRA-12252) Support RR and Speculative Retry for EACH_QUORUM reads

Carl Yeksigian created CASSANDRA-12252:
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             Summary: Support RR and Speculative Retry for EACH_QUORUM reads
                 Key: CASSANDRA-12252
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12252
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Carl Yeksigian


We should properly support read repair and speculative retry for EACH_QUORUM reads.

To support these, we need to make sure that we count responses for each DC separately, so that we can properly monitor the number of responses from each. For speculative retry, we should try to replace each host that we are retrying with one in the same DC; that will make sure that we actually have the correct responses at the end if the speculative retries are successful.



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