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From "Canes Kelly (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KAFKA-5808) The Preferred Replica should be global and dynamic
Date Wed, 30 Aug 2017 05:58:00 GMT
Canes Kelly created KAFKA-5808:
----------------------------------

             Summary: The Preferred Replica should be global and dynamic
                 Key: KAFKA-5808
                 URL: https://issues.apache.org/jira/browse/KAFKA-5808
             Project: Kafka
          Issue Type: New Feature
          Components: core
    Affects Versions: 0.11.0.0
            Reporter: Canes Kelly
             Fix For: 0.11.0.0


When we create a topic in kafka, broker assigns replicas for partitions in this topic, and
the First Replica will be the Preferred Replica which means that kafka cluster will migrate
partition leader to Preferred Replica on the basis of ''imbalance rate''.

Consider that with the increasing of the brokers, the partitions Preferred Replicas are always
the one assigned when created those topic. So the load balancing is not scalable with the
change of the scale of the brokers.

So I would like to propose to modify the assignment of the Preferred Replica when brokers
increase with appropriate consideration of performance declining.





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