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https://issues.apache.org/jira/browse/KAFKA-1464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15121706#comment-15121706
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Jay Kreps commented on KAFKA-1464:
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Another issue this raises is that a partition might have a natural rate of new
data coming in that is higher than the catch-up rate in which case if it ever
falls out of sync it can never catch up. This is possible today to some extent
but not a common problem since the followers are, if anything, a bit faster
than the leader and have no throttle.
> Add a throttling option to the Kafka replication tool
> -----------------------------------------------------
>
> Key: KAFKA-1464
> URL: https://issues.apache.org/jira/browse/KAFKA-1464
> Project: Kafka
> Issue Type: New Feature
> Components: replication
> Affects Versions: 0.8.0
> Reporter: mjuarez
> Assignee: Ismael Juma
> Priority: Minor
> Labels: replication, replication-tools
> Fix For: 0.9.1.0
>
>
> When performing replication on new nodes of a Kafka cluster, the replication
> process will use all available resources to replicate as fast as possible.
> This causes performance issues (mostly disk IO and sometimes network
> bandwidth) when doing this in a production environment, in which you're
> trying to serve downstream applications, at the same time you're performing
> maintenance on the Kafka cluster.
> An option to throttle the replication to a specific rate (in either MB/s or
> activities/second) would help production systems to better handle maintenance
> tasks while still serving downstream applications.
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