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https://issues.apache.org/jira/browse/KAFKA-2528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14739886#comment-14739886
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Dong Lin commented on KAFKA-2528:
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Yeah I think that is a reasonable expectation.
We have done something similar to what you have described -- in experiment 2,
when 4 producers produce to a cluster of 4 brokers configured with 10 MBps
quota per clientId, the broker with most traffic does have ~10 MBps total
throughput. And when quota is 50 MBps the highest throughput is ~50 MBps as
well. I didn't record the precision here, but I am pretty sure the deviation is
< 0.5 MBps. The error is <5% for 10 MBps total traffic and < 1% for 50 MBps
total traffic. I think we can say that quota enforcement is accurate when quota
>= 10 MBps.
However, it does appear problematic that the measured broker throughput can be
2 MBps when quota is only 1 MBps. I don't have definitive explanation yet. I
will try replicate this experiment and let you know.
> Quota Performance Evaluation
> ----------------------------
>
> Key: KAFKA-2528
> URL: https://issues.apache.org/jira/browse/KAFKA-2528
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Dong Lin
> Assignee: Dong Lin
> Attachments: QuotaPerformanceEvaluation.pdf
>
>
> In this document we present the results of experiments we did at LinkedIn, to
> validate the basic functionality of quota, as well as the performances
> benefits of using quota in a heterogeneous multi-tenant environment.
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