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From "Jason Gustafson (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (KAFKA-8717) Use cached hw/lso offset metadata when reading from log
Date Tue, 30 Jul 2019 15:52:00 GMT

     [ https://issues.apache.org/jira/browse/KAFKA-8717?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Gustafson resolved KAFKA-8717.
------------------------------------
       Resolution: Fixed
    Fix Version/s: 2.4.0

> Use cached hw/lso offset metadata when reading from log
> -------------------------------------------------------
>
>                 Key: KAFKA-8717
>                 URL: https://issues.apache.org/jira/browse/KAFKA-8717
>             Project: Kafka
>          Issue Type: Improvement
>            Reporter: Jason Gustafson
>            Assignee: Jason Gustafson
>            Priority: Major
>             Fix For: 2.4.0
>
>
> The broker caches log offset metadata (e.g. segment position) for the high watermark
and last stable offset in order to avoid additional index lookups when handling fetches. Currently
this metadata is only used when determining delayed fetch satisfaction. We can also use it
when reading from the log in order to avoid additional redundant index lookups.



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