Support locality in consumer partition assignment algorithm
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                 Key: KAFKA-168
                 URL: https://issues.apache.org/jira/browse/KAFKA-168
             Project: Kafka
          Issue Type: New Feature
          Components: core
            Reporter: Jay Kreps


There are some use-cases where it makes sense to co-locate brokers and consumer 
processes. In this case it would be nice to optimize the assignment of 
partitions to consumers so that the consumer preferentially consumes from the 
broker with which it is co-located.

If we are going to do KAFKA-167, moving the assignment to the broker, it would 
make sense to do that first so we only have to change the logic in one place.

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