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https://issues.apache.org/jira/browse/KAFKA-657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13537368#comment-13537368
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Jay Kreps commented on KAFKA-657:
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It probably makes sense to do this in two phases. Let's get the patch in that
adds the api, then make the changes to the consumers to make use of it as phase
2.
> Add an API to commit offsets
> ----------------------------
>
> Key: KAFKA-657
> URL: https://issues.apache.org/jira/browse/KAFKA-657
> Project: Kafka
> Issue Type: New Feature
> Reporter: Jay Kreps
> Labels: project
> Attachments: KAFKA-657v1.patch, KAFKA-657v2.patch, KAFKA-657v3.patch,
> KAFKA-657v4.patch
>
>
> Currently the consumer directly writes their offsets to zookeeper. Two
> problems with this: (1) This is a poor use of zookeeper, and we need to
> replace it with a more scalable offset store, and (2) it makes it hard to
> carry over to clients in other languages. A first step towards accomplishing
> that is to add a proper Kafka API for committing offsets. The initial version
> of this would just write to zookeeper as we do today, but in the future we
> would then have the option of changing this.
> This api likely needs to take a sequence of
> consumer-group/topic/partition/offset entries and commit them all.
> It would be good to do a wiki design on how this would work and consensus on
> that first.
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