[jira] [Commented] (STORM-1015) Store Kafka offsets with Kafka's consumer offset management api

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/STORM-1015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14942549#comment-14942549 ] 

ASF GitHub Bot commented on STORM-1015:
---------------------------------------

Github user hsun-cnnxty commented on the pull request:

    https://github.com/apache/storm/pull/705#issuecomment-145317404
  
    Hi Chi,
    
    Storm stores more than just offset/partition data in the "state",  would it be necessary to declare?
    
    public interface StateStore {
      public void write(Partition p, Map<Object, Object> state);
      public Map<Object, Object> state read(Partition p);
    }
    
    -thanks
    



> Store Kafka offsets with Kafka's consumer offset management api
> ---------------------------------------------------------------
>
>                 Key: STORM-1015
>                 URL: https://issues.apache.org/jira/browse/STORM-1015
>             Project: Apache Storm
>          Issue Type: Improvement
>          Components: storm-kafka
>    Affects Versions: 0.11.0
>            Reporter: Hang Sun
>            Priority: Minor
>              Labels: consumer, kafka, offset
>   Original Estimate: 72h
>  Remaining Estimate: 72h
>
> Current Kafka spout stores the offsets (and some other states) inside ZK with its proprietary format. This does not work well with other Kafka offset monitoring tools such as Burrow, KafkaOffsetMonitor etc. In addition, the performance does not scale well compared with offsets managed by Kafka's built-in offset management api. I have added a new option for Kafka to store the same data using Kafka's built-in offset management capability. The change is completely backward compatible with the current ZK storage option. The feature can be turned on by a single configuration option. Hope this will help people who wants to explore the option of using Kafka's built-in offset management api.
> References:
> https://cwiki.apache.org/confluence/display/KAFKA/Committing+and+fetching+consumer+offsets+in+Kafka
> https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-OffsetCommit/FetchAPI
> -thanks



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