[jira] [Updated] (KAFKA-3062) Read from kafka replication to get data likely Version based

["Ray Chiang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-3062?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ray Chiang updated KAFKA-3062:
------------------------------
    Component/s: replication

> Read from kafka replication to get data likely Version based
> ------------------------------------------------------------
>
>                 Key: KAFKA-3062
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3062
>             Project: Kafka
>          Issue Type: Improvement
>          Components: replication
>            Reporter: xingang
>            Priority: Major
>
> Since Kafka require all the reading happen in the leader for the consistency.
> in case, for large volume data of a Topic have a number of consumers, among them, some consumers are Not latency-sensitive But Data-Loss sensitive have a consuming lag, then, it will pollute the Page cache as they are reading from the disk, hence, for other consumers which are latency-sensitive will be sad due to the pagecache miss
> If there could be possible for the reading can happen in replicas for a eventually consistent (likely version based), thus, consumers marked as "read from replica" can be separated from others 



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