Yan Xu created MESOS-770:
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Summary: Rate control and randomization of Replicated Log
catching-up
Key: MESOS-770
URL: https://issues.apache.org/jira/browse/MESOS-770
Project: Mesos
Issue Type: Improvement
Reporter: Yan Xu
When the log is catching up either in the process of recovering or after
coordinator failover the Paxos protocol is run on multiple positions (possibly
the entire log) concurrently. Too much concurrency could have negative impact
on the network and the problem may be exacerbated by the contention among
between multiple recovering replicas and the coordinator.
Rate control helps limit the number of concurrent positions a proposer
(recoverer or coordinator) seeks consensus at a time. We can batch a number of
positions each time.
Randomly picking the positions in each batch reduces the possibility that
multiple proposers contend for the same position at the same time which causes
conflict and retries.
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