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From Christian Carollo <ccaro...@gmail.com>
Subject Re: Kafka/ZK Cluster Example
Date Wed, 11 Jan 2012 22:06:14 GMT

I don't think I ask my question the right way. 

What I am trying to understand is what are the minimum constituent parts of a kafka cluster?

Based on your last email, I am now wondering what are the minimum constituent parts of a ZK
cluster as well as a Kafka cluster?

For example, can I have one ZK instance and one broker on one machine and that is enough to
define a ZK cluster and a Kafka Cluster?


On Jan 11, 2012, at 1:50 PM, Jun Rao <junrao@gmail.com> wrote:

> Chrsitan,
> A Kafka cluster containers a ZK cluster and a list of brokers. When a
> consumer subscribes to a topic in a kafka cluster, it consumes data stored
> in all brokers in that cluster.
> Thanks,
> Jun
> On Tue, Jan 10, 2012 at 11:28 PM, Christian Carollo <ccarollo@gmail.com>wrote:
>> Thank you Jun that is quite helpful.  I have a question about Kafka
>> Clusters.  What are the minimum number and types of services that must be
>> running to make up a Kafka Cluster?
>> I ask this because the diagrams (in the Kafka Mirroring document) allude
>> to a multiple broker environment, however, since each broker does not
>> appear to provide redundancy (as of today) to any of the other brokers in a
>> given zookeeper service, it seems like a Kafka Cluster is nothing more than
>> a grouping of a single zookeeper instance with a single Kafka broker, is
>> this the correct understanding?
>> Thanks,
>> Christian
>> On Jan 10, 2012, at 8:47 AM, Jun Rao wrote:
>>> With 0.7, you can set up inter-cluster replication (
>>> https://cwiki.apache.org/confluence/display/KAFKA/Kafka+mirroring).
>>> For the future 0.8 release, we are working on intra-cluster replication
>>> support and details can be found at
>>> https://issues.apache.org/jira/browse/KAFKA-50
>>> Thanks,
>>> Jun
>>> On Mon, Jan 9, 2012 at 9:52 PM, Christian Carollo <ccarollo@gmail.com
>>> wrote:
>>>> I am looking to implement Kafka in a production environment, however, I
>>>> haven't found in documentation or examples that
>>>> discuss how to build a redundant implementation.  Is there any
>>>> documentation out their (blogs, articles, etc.) that describes
>>>> how we can implement such a system with Kafka 0.6 or 0.7.
>>>> Also, is there a timeframe the community is shooting for, to release
>> 0.8 w/
>>>> replication?
>>>> Thanks
>>>> Christian

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