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Posted to common-dev@hadoop.apache.org by "Steve Loughran (Jira)" <ji...@apache.org> on 2023/02/02 18:46:00 UTC

[jira] [Resolved] (HADOOP-18246) Remove lower limit on s3a prefetching/caching block size

     [ https://issues.apache.org/jira/browse/HADOOP-18246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran resolved HADOOP-18246.
-------------------------------------
    Fix Version/s: 3.4.0
       Resolution: Fixed

> Remove lower limit on s3a prefetching/caching block size
> --------------------------------------------------------
>
>                 Key: HADOOP-18246
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18246
>             Project: Hadoop Common
>          Issue Type: Sub-task
>    Affects Versions: 3.4.0
>            Reporter: Daniel Carl Jones
>            Assignee: Ankit Saurabh
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 3.4.0
>
>
> The minimum allowed block size currently is {{PREFETCH_BLOCK_DEFAULT_SIZE}} (8MB).
> {code:java}
> this.prefetchBlockSize = intOption(
>                     conf, PREFETCH_BLOCK_SIZE_KEY, PREFETCH_BLOCK_DEFAULT_SIZE, PREFETCH_BLOCK_DEFAULT_SIZE);{code}
> [https://github.com/apache/hadoop/blob/3aa03e0eb95bbcb066144706e06509f0e0549196/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java#L487-L488]
> Why is this the case and should we lower or remove it?



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