Neil Conway created MESOS-3572:
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             Summary: Faster catchup protocol for "learned" replicated log 
entries
                 Key: MESOS-3572
                 URL: https://issues.apache.org/jira/browse/MESOS-3572
             Project: Mesos
          Issue Type: Bug
            Reporter: Neil Conway


Right now, the catchup protocol does a full Paxos round for every log entry 
missing from a recovering replica. This should be unnecessary for "learned" log 
entries, because there is no uncertainty about the status of such log entries. 
We'll probably only need to do a full Paxos round for entries near the tail of 
the log.

To motivate changing this, it would be good to first measure the performance of 
the catchup protocol to understand if/when performance improvements would be 
useful. There's also [MESOS-736], which is about how to do catchup in parallel.



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