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From Jun Rao <jun...@gmail.com>
Subject Re: partition and consumer stream number
Date Wed, 19 Dec 2012 15:49:51 GMT
Did you get my previous answer? I am including it below.

Currently, partition is the smallest unit that we distribute data among
consumers (in the same consumer group). So, if the # of consumers is larger
than the total number of partitions in a Kafka cluster (across all
brokers), some consumers will never get any data.



On Wed, Dec 19, 2012 at 3:07 AM, 永辉 赵 <zhaoyonghui@gmail.com> wrote:

> Hi all,
> In consumer we use a topic count map to set how many stream we want to
> split
> the topic.
> What's the relation between kafka partition number and consumer stream
> number?
> Seems  stream number should be less or equal to partition number?
> Because if we set stream number bigger than partition number then some
> stream is empty or some partition is split.
> Thanks,
> Yonghui

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