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https://issues.apache.org/jira/browse/KAFKA-6020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17419571#comment-17419571
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King Jin commented on KAFKA-6020:
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How about broker side filtering by Kafka Headers? The consumer sent filtering
header when request more messages from broker, the broker filtering message by
header before response message back to consumer.
> Broker side filtering
> ---------------------
>
> Key: KAFKA-6020
> URL: https://issues.apache.org/jira/browse/KAFKA-6020
> Project: Kafka
> Issue Type: New Feature
> Components: consumer
> Reporter: Pavel Micka
> Priority: Major
> Labels: needs-kip
>
> Currently, it is not possible to filter messages on broker side. Filtering
> messages on broker side is convenient for filter with very low selectivity
> (one message in few thousands). In my case it means to transfer several GB of
> data to consumer, throw it away, take one message and do it again...
> While I understand that filtering by message body is not feasible (for
> performance reasons), I propose to filter just by message key prefix. This
> can be achieved even without any deserialization, as the prefix to be matched
> can be passed as an array (hence the broker would do just array prefix
> compare).
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