Canes Kelly created KAFKA-5808:
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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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